drivers/media/video/cx88/cx88-alsa.c

   1 /*
   2  *
   3  *  Support for audio capture
   4  *  PCI function #1 of the cx2388x.
   5  *
   6  *    (c) 2005,2006 Ricardo Cerqueira <v4l@cerqueira.org>
   7  *    (c) 2005 Mauro Carvalho Chehab <mchehab@infradead.org>
   8  *    Based on a dummy cx88 module by Gerd Knorr <kraxel@bytesex.org>
   9  *    Based on dummy.c by Jaroslav Kysela <perex@suse.cz>
  10  *
  11  *  This program is free software; you can redistribute it and/or modify
  12  *  it under the terms of the GNU General Public License as published by
  13  *  the Free Software Foundation; either version 2 of the License, or
  14  *  (at your option) any later version.
  15  *
  16  *  This program is distributed in the hope that it will be useful,
  17  *  but WITHOUT ANY WARRANTY; without even the implied warranty of
  18  *  MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
  19  *  GNU General Public License for more details.
  20  *
  21  *  You should have received a copy of the GNU General Public License
  22  *  along with this program; if not, write to the Free Software
  23  *  Foundation, Inc., 675 Mass Ave, Cambridge, MA 02139, USA.
  24  */
  25
  26 #include <linux/module.h>
  27 #include <linux/init.h>
  28 #include <linux/device.h>
  29 #include <linux/interrupt.h>
  30 #include <linux/dma-mapping.h>
  31
  32 #include <asm/delay.h>
  33 #include <sound/driver.h>
  34 #include <sound/core.h>
  35 #include <sound/pcm.h>
  36 #include <sound/pcm_params.h>
  37 #include <sound/control.h>
  38 #include <sound/initval.h>
  39
  40 #include "cx88.h"
  41 #include "cx88-reg.h"
  42
  43 #define dprintk(level,fmt, arg...)      if (debug >= level) \
  44         printk(KERN_INFO "%s/1: " fmt, chip->core->name , ## arg)
  45
  46 #define dprintk_core(level,fmt, arg...) if (debug >= level) \
  47         printk(KERN_DEBUG "%s/1: " fmt, chip->core->name , ## arg)
  48
  49
  50 /****************************************************************************
  51         Data type declarations - Can be moded to a header file later
  52  ****************************************************************************/
  53
  54 /* These can be replaced after done */
  55 #define MIXER_ADDR_LAST MAX_CX88_INPUT
  56
  57 struct cx88_audio_dev {
  58         struct cx88_core           *core;
  59         struct cx88_dmaqueue       q;
  60
  61         /* pci i/o */
  62         struct pci_dev             *pci;
  63         unsigned char              pci_rev,pci_lat;
  64
  65         /* audio controls */
  66         int                        irq;
  67
  68         struct snd_card            *card;
  69
  70         spinlock_t                 reg_lock;
  71
  72         unsigned int               dma_size;
  73         unsigned int               period_size;
  74         unsigned int               num_periods;
  75
  76         struct videobuf_dmabuf dma_risc;
  77
  78         int                        mixer_volume[MIXER_ADDR_LAST+1][2];
  79         int                        capture_source[MIXER_ADDR_LAST+1][2];
  80
  81         long int read_count;
  82         long int read_offset;
  83
  84         struct cx88_buffer   *buf;
  85
  86         long opened;
  87         struct snd_pcm_substream *substream;
  88
  89 };
  90 typedef struct cx88_audio_dev snd_cx88_card_t;
  91
  92
  93
  94 /****************************************************************************
  95                         Module global static vars
  96  ****************************************************************************/
  97
  98 static int index[SNDRV_CARDS] = SNDRV_DEFAULT_IDX;      /* Index 0-MAX */
  99 static char *id[SNDRV_CARDS] = SNDRV_DEFAULT_STR;       /* ID for this card */
 100 static int enable[SNDRV_CARDS] = {1, [1 ... (SNDRV_CARDS - 1)] = 1};
 101 static struct snd_card *snd_cx88_cards[SNDRV_CARDS];
 102
 103 module_param_array(enable, bool, NULL, 0444);
 104 MODULE_PARM_DESC(enable, "Enable cx88x soundcard. default enabled.");
 105
 106 module_param_array(index, int, NULL, 0444);
 107 MODULE_PARM_DESC(index, "Index value for cx88x capture interface(s).");
 108
 109
 110 /****************************************************************************
 111                                 Module macros
 112  ****************************************************************************/
 113
 114 MODULE_DESCRIPTION("ALSA driver module for cx2388x based TV cards");
 115 MODULE_AUTHOR("Ricardo Cerqueira");
 116 MODULE_AUTHOR("Mauro Carvalho Chehab <mchehab@infradead.org>");
 117 MODULE_LICENSE("GPL");
 118 MODULE_SUPPORTED_DEVICE("{{Conexant,23881},"
 119                         "{{Conexant,23882},"
 120                         "{{Conexant,23883}");
 121 static unsigned int debug;
 122 module_param(debug,int,0644);
 123 MODULE_PARM_DESC(debug,"enable debug messages");
 124
 125 /****************************************************************************
 126                         Module specific funtions
 127  ****************************************************************************/
 128
 129 /*
 130  * BOARD Specific: Sets audio DMA
 131  */
 132
 133 static int _cx88_start_audio_dma(snd_cx88_card_t *chip)
 134 {
 135         struct cx88_buffer   *buf = chip->buf;
 136         struct cx88_core *core=chip->core;
 137         struct sram_channel *audio_ch = &cx88_sram_channels[SRAM_CH25];
 138
 139         /* Make sure RISC/FIFO are off before changing FIFO/RISC settings */
 140         cx_clear(MO_AUD_DMACNTRL, 0x11);
 141
 142         /* setup fifo + format - out channel */
 143         cx88_sram_channel_setup(chip->core, audio_ch, buf->bpl, buf->risc.dma);
 144
 145         /* sets bpl size */
 146         cx_write(MO_AUDD_LNGTH, buf->bpl);
 147
 148         /* reset counter */
 149         cx_write(MO_AUDD_GPCNTRL,GP_COUNT_CONTROL_RESET);
 150
 151         dprintk(1, "Start audio DMA, %d B/line, %d lines/FIFO, %d lines/irq, "
 152                 "%d B/irq\n", buf->bpl, cx_read(audio_ch->cmds_start + 8)>>1,
 153                 chip->num_periods, buf->bpl * chip->num_periods);
 154
 155         dprintk(1, "Enabling IRQ, setting mask from 0x%x to 0x%x\n",
 156                 chip->core->pci_irqmask,
 157                 chip->core->pci_irqmask | PCI_INT_AUDINT);
 158
 159         /* Enables corresponding bits at AUD_INT_STAT */
 160         cx_write(MO_AUD_INTMSK, AUD_INT_OPC_ERR | AUD_INT_DN_SYNC |
 161                                 AUD_INT_DN_RISCI2 | AUD_INT_DN_RISCI1);
 162
 163         /* Clean any pending interrupt bits already set */
 164         cx_write(MO_AUD_INTSTAT, ~0);
 165
 166         /* enable audio irqs */
 167         cx_set(MO_PCI_INTMSK, chip->core->pci_irqmask | PCI_INT_AUDINT);
 168
 169         /* start dma */
 170         cx_set(MO_DEV_CNTRL2, (1<<5)); /* Enables Risc Processor */
 171         cx_set(MO_AUD_DMACNTRL, 0x11); /* audio downstream FIFO and RISC enable */
 172
 173         if (debug)
 174                 cx88_sram_channel_dump(chip->core, audio_ch);
 175
 176         return 0;
 177 }
 178
 179 /*
 180  * BOARD Specific: Resets audio DMA
 181  */
 182 static int _cx88_stop_audio_dma(snd_cx88_card_t *chip)
 183 {
 184         struct cx88_core *core=chip->core;
 185         dprintk(1, "Stopping audio DMA\n");
 186
 187         /* stop dma */
 188         cx_clear(MO_AUD_DMACNTRL, 0x11);
 189
 190         /* disable irqs */
 191         cx_clear(MO_PCI_INTMSK, PCI_INT_AUDINT);
 192         cx_clear(MO_AUD_INTMSK, AUD_INT_OPC_ERR | AUD_INT_DN_SYNC |
 193                                 AUD_INT_DN_RISCI2 | AUD_INT_DN_RISCI1);
 194
 195         if (debug)
 196                 cx88_sram_channel_dump(chip->core, &cx88_sram_channels[SRAM_CH25]);
 197
 198         return 0;
 199 }
 200
 201 #define MAX_IRQ_LOOP 10
 202
 203 /*
 204  * BOARD Specific: IRQ dma bits
 205  */
 206 static char *cx88_aud_irqs[32] = {
 207         "dn_risci1", "up_risci1", "rds_dn_risc1", /* 0-2 */
 208         NULL,                                     /* reserved */
 209         "dn_risci2", "up_risci2", "rds_dn_risc2", /* 4-6 */
 210         NULL,                                     /* reserved */
 211         "dnf_of", "upf_uf", "rds_dnf_uf",         /* 8-10 */
 212         NULL,                                     /* reserved */
 213         "dn_sync", "up_sync", "rds_dn_sync",      /* 12-14 */
 214         NULL,                                     /* reserved */
 215         "opc_err", "par_err", "rip_err",          /* 16-18 */
 216         "pci_abort", "ber_irq", "mchg_irq"        /* 19-21 */
 217 };
 218
 219 /*
 220  * BOARD Specific: Threats IRQ audio specific calls
 221  */
 222 static void cx8801_aud_irq(snd_cx88_card_t *chip)
 223 {
 224         struct cx88_core *core = chip->core;
 225         u32 status, mask;
 226         u32 count;
 227
 228         status = cx_read(MO_AUD_INTSTAT);
 229         mask   = cx_read(MO_AUD_INTMSK);
 230         if (0 == (status & mask)) {
 231                 spin_unlock(&chip->reg_lock);
 232                 return;
 233         }
 234         cx_write(MO_AUD_INTSTAT, status);
 235         if (debug > 1  ||  (status & mask & ~0xff))
 236                 cx88_print_irqbits(core->name, "irq aud",
 237                                    cx88_aud_irqs, ARRAY_SIZE(cx88_aud_irqs),
 238                                    status, mask);
 239         /* risc op code error */
 240         if (status & AUD_INT_OPC_ERR) {
 241                 printk(KERN_WARNING "%s/0: audio risc op code error\n",core->name);
 242                 cx_clear(MO_AUD_DMACNTRL, 0x11);
 243                 cx88_sram_channel_dump(core, &cx88_sram_channels[SRAM_CH25]);
 244         }
 245
 246         /* risc1 downstream */
 247         if (status & AUD_INT_DN_RISCI1) {
 248                 spin_lock(&chip->reg_lock);
 249                 count = cx_read(MO_AUDD_GPCNT);
 250                 spin_unlock(&chip->reg_lock);
 251                 if (chip->read_count == 0)
 252                         chip->read_count += chip->dma_size;
 253         }
 254
 255         if  (chip->read_count >= chip->period_size) {
 256                 dprintk(2, "Elapsing period\n");
 257                 snd_pcm_period_elapsed(chip->substream);
 258         }
 259
 260         dprintk(3,"Leaving audio IRQ handler...\n");
 261
 262         /* FIXME: Any other status should deserve a special handling? */
 263 }
 264
 265 /*
 266  * BOARD Specific: Handles IRQ calls
 267  */
 268 static irqreturn_t cx8801_irq(int irq, void *dev_id)
 269 {
 270         snd_cx88_card_t *chip = dev_id;
 271         struct cx88_core *core = chip->core;
 272         u32 status;
 273         int loop, handled = 0;
 274
 275         for (loop = 0; loop < MAX_IRQ_LOOP; loop++) {
 276                 status = cx_read(MO_PCI_INTSTAT) &
 277                         (core->pci_irqmask | PCI_INT_AUDINT);
 278                 if (0 == status)
 279                         goto out;
 280                 dprintk( 3, "cx8801_irq\n" );
 281                 dprintk( 3, "    loop: %d/%d\n", loop, MAX_IRQ_LOOP );
 282                 dprintk( 3, "    status: %d\n", status );
 283                 handled = 1;
 284                 cx_write(MO_PCI_INTSTAT, status);
 285
 286                 if (status & core->pci_irqmask)
 287                         cx88_core_irq(core, status);
 288                 if (status & PCI_INT_AUDINT) {
 289                         dprintk( 2, "    ALSA IRQ handling\n" );
 290                         cx8801_aud_irq(chip);
 291                 }
 292         };
 293
 294         if (MAX_IRQ_LOOP == loop) {
 295                 dprintk( 0, "clearing mask\n" );
 296                 dprintk(1,"%s/0: irq loop -- clearing mask\n",
 297                        core->name);
 298                 cx_clear(MO_PCI_INTMSK, PCI_INT_AUDINT);
 299         }
 300
 301  out:
 302         return IRQ_RETVAL(handled);
 303 }
 304
 305
 306 static int dsp_buffer_free(snd_cx88_card_t *chip)
 307 {
 308         BUG_ON(!chip->dma_size);
 309
 310         dprintk(2,"Freeing buffer\n");
 311         videobuf_pci_dma_unmap(chip->pci, &chip->dma_risc);
 312         videobuf_dma_free(&chip->dma_risc);
 313         btcx_riscmem_free(chip->pci,&chip->buf->risc);
 314         kfree(chip->buf);
 315
 316         chip->dma_size = 0;
 317
 318        return 0;
 319 }
 320
 321 /****************************************************************************
 322                                 ALSA PCM Interface
 323  ****************************************************************************/
 324
 325 /*
 326  * Digital hardware definition
 327  */
 328 static struct snd_pcm_hardware snd_cx88_digital_hw = {
 329         .info = SNDRV_PCM_INFO_MMAP |
 330                 SNDRV_PCM_INFO_INTERLEAVED |
 331                 SNDRV_PCM_INFO_BLOCK_TRANSFER |
 332                 SNDRV_PCM_INFO_MMAP_VALID,
 333         .formats = SNDRV_PCM_FMTBIT_S16_LE,
 334
 335         .rates =                SNDRV_PCM_RATE_48000,
 336         .rate_min =             48000,
 337         .rate_max =             48000,
 338         .channels_min = 1,
 339         .channels_max = 2,
 340         .buffer_bytes_max = (2*2048),
 341         .period_bytes_min = 2048,
 342         .period_bytes_max = 2048,
 343         .periods_min = 2,
 344         .periods_max = 2,
 345 };
 346
 347 /*
 348  * audio pcm capture runtime free
 349  */
 350 static void snd_card_cx88_runtime_free(struct snd_pcm_runtime *runtime)
 351 {
 352 }
 353 /*
 354  * audio pcm capture open callback
 355  */
 356 static int snd_cx88_pcm_open(struct snd_pcm_substream *substream)
 357 {
 358         snd_cx88_card_t *chip = snd_pcm_substream_chip(substream);
 359         struct snd_pcm_runtime *runtime = substream->runtime;
 360         int err;
 361
 362         if (test_and_set_bit(0, &chip->opened))
 363                 return -EBUSY;
 364
 365         err = snd_pcm_hw_constraint_integer(runtime, SNDRV_PCM_HW_PARAM_PERIODS);
 366         if (err < 0)
 367                 goto _error;
 368
 369         chip->substream = substream;
 370
 371         chip->read_count = 0;
 372         chip->read_offset = 0;
 373
 374         runtime->private_free = snd_card_cx88_runtime_free;
 375         runtime->hw = snd_cx88_digital_hw;
 376
 377         return 0;
 378 _error:
 379         dprintk(1,"Error opening PCM!\n");
 380         clear_bit(0, &chip->opened);
 381         smp_mb__after_clear_bit();
 382         return err;
 383 }
 384
 385 /*
 386  * audio close callback
 387  */
 388 static int snd_cx88_close(struct snd_pcm_substream *substream)
 389 {
 390         snd_cx88_card_t *chip = snd_pcm_substream_chip(substream);
 391
 392         clear_bit(0, &chip->opened);
 393         smp_mb__after_clear_bit();
 394
 395         return 0;
 396 }
 397
 398 /*
 399  * hw_params callback
 400  */
 401 static int snd_cx88_hw_params(struct snd_pcm_substream * substream,
 402                               struct snd_pcm_hw_params * hw_params)
 403 {
 404         snd_cx88_card_t *chip = snd_pcm_substream_chip(substream);
 405         struct cx88_buffer *buf;
 406
 407         if (substream->runtime->dma_area) {
 408                 dsp_buffer_free(chip);
 409                 substream->runtime->dma_area = NULL;
 410         }
 411
 412
 413         chip->period_size = params_period_bytes(hw_params);
 414         chip->num_periods = params_periods(hw_params);
 415         chip->dma_size = chip->period_size * params_periods(hw_params);
 416
 417         BUG_ON(!chip->dma_size);
 418
 419         dprintk(1,"Setting buffer\n");
 420
 421         buf = kzalloc(sizeof(*buf),GFP_KERNEL);
 422         if (NULL == buf)
 423                 return -ENOMEM;
 424
 425         buf->vb.memory = V4L2_MEMORY_MMAP;
 426         buf->vb.width  = chip->period_size;
 427         buf->vb.height = chip->num_periods;
 428         buf->vb.size   = chip->dma_size;
 429         buf->vb.field  = V4L2_FIELD_NONE;
 430
 431         videobuf_dma_init(&buf->vb.dma);
 432         videobuf_dma_init_kernel(&buf->vb.dma,PCI_DMA_FROMDEVICE,
 433                         (PAGE_ALIGN(buf->vb.size) >> PAGE_SHIFT));
 434
 435         videobuf_pci_dma_map(chip->pci,&buf->vb.dma);
 436
 437
 438         cx88_risc_databuffer(chip->pci, &buf->risc,
 439                         buf->vb.dma.sglist,
 440                         buf->vb.width, buf->vb.height);
 441
 442         buf->risc.jmp[0] = cpu_to_le32(RISC_JUMP | RISC_IRQ1 | RISC_CNT_INC);
 443         buf->risc.jmp[1] = cpu_to_le32(buf->risc.dma);
 444
 445         buf->vb.state = STATE_PREPARED;
 446
 447         buf->bpl = chip->period_size;
 448         chip->buf = buf;
 449         chip->dma_risc = buf->vb.dma;
 450
 451         dprintk(1,"Buffer ready at %u\n",chip->dma_risc.nr_pages);
 452         substream->runtime->dma_area = chip->dma_risc.vmalloc;
 453         return 0;
 454 }
 455
 456 /*
 457  * hw free callback
 458  */
 459 static int snd_cx88_hw_free(struct snd_pcm_substream * substream)
 460 {
 461
 462         snd_cx88_card_t *chip = snd_pcm_substream_chip(substream);
 463
 464         if (substream->runtime->dma_area) {
 465                 dsp_buffer_free(chip);
 466                 substream->runtime->dma_area = NULL;
 467         }
 468
 469         return 0;
 470 }
 471
 472 /*
 473  * prepare callback
 474  */
 475 static int snd_cx88_prepare(struct snd_pcm_substream *substream)
 476 {
 477         return 0;
 478 }
 479
 480
 481 /*
 482  * trigger callback
 483  */
 484 static int snd_cx88_card_trigger(struct snd_pcm_substream *substream, int cmd)
 485 {
 486         snd_cx88_card_t *chip = snd_pcm_substream_chip(substream);
 487         int err;
 488
 489         spin_lock(&chip->reg_lock);
 490
 491         switch (cmd) {
 492         case SNDRV_PCM_TRIGGER_START:
 493                 err=_cx88_start_audio_dma(chip);
 494                 break;
 495         case SNDRV_PCM_TRIGGER_STOP:
 496                 err=_cx88_stop_audio_dma(chip);
 497                 break;
 498         default:
 499                 err=-EINVAL;
 500                 break;
 501         }
 502
 503         spin_unlock(&chip->reg_lock);
 504
 505         return err;
 506 }
 507
 508 /*
 509  * pointer callback
 510  */
 511 static snd_pcm_uframes_t snd_cx88_pointer(struct snd_pcm_substream *substream)
 512 {
 513         snd_cx88_card_t *chip = snd_pcm_substream_chip(substream);
 514         struct snd_pcm_runtime *runtime = substream->runtime;
 515
 516         if (chip->read_count) {
 517                 chip->read_count -= snd_pcm_lib_period_bytes(substream);
 518                 chip->read_offset += snd_pcm_lib_period_bytes(substream);
 519                 if (chip->read_offset == chip->dma_size)
 520                         chip->read_offset = 0;
 521         }
 522
 523         dprintk(2, "Pointer time, will return %li, read %li\n",chip->read_offset,chip->read_count);
 524         return bytes_to_frames(runtime, chip->read_offset);
 525
 526 }
 527
 528 /*
 529  * operators
 530  */
 531 static struct snd_pcm_ops snd_cx88_pcm_ops = {
 532         .open = snd_cx88_pcm_open,
 533         .close = snd_cx88_close,
 534         .ioctl = snd_pcm_lib_ioctl,
 535         .hw_params = snd_cx88_hw_params,
 536         .hw_free = snd_cx88_hw_free,
 537         .prepare = snd_cx88_prepare,
 538         .trigger = snd_cx88_card_trigger,
 539         .pointer = snd_cx88_pointer,
 540 };
 541
 542 /*
 543  * create a PCM device
 544  */
 545 static int __devinit snd_cx88_pcm(snd_cx88_card_t *chip, int device, char *name)
 546 {
 547         int err;
 548         struct snd_pcm *pcm;
 549
 550         err = snd_pcm_new(chip->card, name, device, 0, 1, &pcm);
 551         if (err < 0)
 552                 return err;
 553         pcm->private_data = chip;
 554         strcpy(pcm->name, name);
 555         snd_pcm_set_ops(pcm, SNDRV_PCM_STREAM_CAPTURE, &snd_cx88_pcm_ops);
 556
 557         return 0;
 558 }
 559
 560 /****************************************************************************
 561                                 CONTROL INTERFACE
 562  ****************************************************************************/
 563 static int snd_cx88_capture_volume_info(struct snd_kcontrol *kcontrol,
 564                                         struct snd_ctl_elem_info *info)
 565 {
 566         info->type = SNDRV_CTL_ELEM_TYPE_INTEGER;
 567         info->count = 1;
 568         info->value.integer.min = 0;
 569         info->value.integer.max = 0x3f;
 570
 571         return 0;
 572 }
 573
 574 /* OK - TODO: test it */
 575 static int snd_cx88_capture_volume_get(struct snd_kcontrol *kcontrol,
 576                                        struct snd_ctl_elem_value *value)
 577 {
 578         snd_cx88_card_t *chip = snd_kcontrol_chip(kcontrol);
 579         struct cx88_core *core=chip->core;
 580
 581         value->value.integer.value[0] = 0x3f - (cx_read(AUD_VOL_CTL) & 0x3f);
 582
 583         return 0;
 584 }
 585
 586 /* OK - TODO: test it */
 587 static int snd_cx88_capture_volume_put(struct snd_kcontrol *kcontrol,
 588                                        struct snd_ctl_elem_value *value)
 589 {
 590         snd_cx88_card_t *chip = snd_kcontrol_chip(kcontrol);
 591         struct cx88_core *core=chip->core;
 592         int v;
 593         u32 old_control;
 594
 595         spin_lock_irq(&chip->reg_lock);
 596         old_control = 0x3f - (cx_read(AUD_VOL_CTL) & 0x3f);
 597         v = 0x3f - (value->value.integer.value[0] & 0x3f);
 598         cx_andor(AUD_VOL_CTL, 0x3f, v);
 599         spin_unlock_irq(&chip->reg_lock);
 600
 601         return v != old_control;
 602 }
 603
 604 static struct snd_kcontrol_new snd_cx88_capture_volume = {
 605         .iface = SNDRV_CTL_ELEM_IFACE_MIXER,
 606         .name = "Capture Volume",
 607         .info = snd_cx88_capture_volume_info,
 608         .get = snd_cx88_capture_volume_get,
 609         .put = snd_cx88_capture_volume_put,
 610 };
 611
 612
 613 /****************************************************************************
 614                         Basic Flow for Sound Devices
 615  ****************************************************************************/
 616
 617 /*
 618  * PCI ID Table - 14f1:8801 and 14f1:8811 means function 1: Audio
 619  * Only boards with eeprom and byte 1 at eeprom=1 have it
 620  */
 621
 622 static struct pci_device_id cx88_audio_pci_tbl[] __devinitdata = {
 623         {0x14f1,0x8801,PCI_ANY_ID,PCI_ANY_ID,0,0,0},
 624         {0x14f1,0x8811,PCI_ANY_ID,PCI_ANY_ID,0,0,0},
 625         {0, }
 626 };
 627 MODULE_DEVICE_TABLE(pci, cx88_audio_pci_tbl);
 628
 629 /*
 630  * Chip-specific destructor
 631  */
 632
 633 static int snd_cx88_free(snd_cx88_card_t *chip)
 634 {
 635
 636         if (chip->irq >= 0){
 637                 synchronize_irq(chip->irq);
 638                 free_irq(chip->irq, chip);
 639         }
 640
 641         cx88_core_put(chip->core,chip->pci);
 642
 643         pci_disable_device(chip->pci);
 644         return 0;
 645 }
 646
 647 /*
 648  * Component Destructor
 649  */
 650 static void snd_cx88_dev_free(struct snd_card * card)
 651 {
 652         snd_cx88_card_t *chip = card->private_data;
 653
 654         snd_cx88_free(chip);
 655 }
 656
 657
 658 /*
 659  * Alsa Constructor - Component probe
 660  */
 661
 662 static int devno;
 663 static int __devinit snd_cx88_create(struct snd_card *card,
 664                                      struct pci_dev *pci,
 665                                      snd_cx88_card_t **rchip)
 666 {
 667         snd_cx88_card_t   *chip;
 668         struct cx88_core  *core;
 669         int               err;
 670
 671         *rchip = NULL;
 672
 673         err = pci_enable_device(pci);
 674         if (err < 0)
 675                 return err;
 676
 677         pci_set_master(pci);
 678
 679         chip = (snd_cx88_card_t *) card->private_data;
 680
 681         core = cx88_core_get(pci);
 682         if (NULL == core) {
 683                 err = -EINVAL;
 684                 kfree (chip);
 685                 return err;
 686         }
 687
 688         if (!pci_dma_supported(pci,DMA_32BIT_MASK)) {
 689                 dprintk(0, "%s/1: Oops: no 32bit PCI DMA ???\n",core->name);
 690                 err = -EIO;
 691                 cx88_core_put(core,pci);
 692                 return err;
 693         }
 694
 695
 696         /* pci init */
 697         chip->card = card;
 698         chip->pci = pci;
 699         chip->irq = -1;
 700         spin_lock_init(&chip->reg_lock);
 701
 702         chip->core = core;
 703
 704         /* get irq */
 705         err = request_irq(chip->pci->irq, cx8801_irq,
 706                           IRQF_SHARED | IRQF_DISABLED, chip->core->name, chip);
 707         if (err < 0) {
 708                 dprintk(0, "%s: can't get IRQ %d\n",
 709                        chip->core->name, chip->pci->irq);
 710                 return err;
 711         }
 712
 713         /* print pci info */
 714         pci_read_config_byte(pci, PCI_CLASS_REVISION, &chip->pci_rev);
 715         pci_read_config_byte(pci, PCI_LATENCY_TIMER,  &chip->pci_lat);
 716
 717         dprintk(1,"ALSA %s/%i: found at %s, rev: %d, irq: %d, "
 718                "latency: %d, mmio: 0x%llx\n", core->name, devno,
 719                pci_name(pci), chip->pci_rev, pci->irq,
 720                chip->pci_lat,(unsigned long long)pci_resource_start(pci,0));
 721
 722         chip->irq = pci->irq;
 723         synchronize_irq(chip->irq);
 724
 725         snd_card_set_dev(card, &pci->dev);
 726
 727         *rchip = chip;
 728
 729         return 0;
 730 }
 731
 732 static int __devinit cx88_audio_initdev(struct pci_dev *pci,
 733                                     const struct pci_device_id *pci_id)
 734 {
 735         struct snd_card  *card;
 736         snd_cx88_card_t  *chip;
 737         int              err;
 738
 739         if (devno >= SNDRV_CARDS)
 740                 return (-ENODEV);
 741
 742         if (!enable[devno]) {
 743                 ++devno;
 744                 return (-ENOENT);
 745         }
 746
 747         card = snd_card_new(index[devno], id[devno], THIS_MODULE, sizeof(snd_cx88_card_t));
 748         if (!card)
 749                 return (-ENOMEM);
 750
 751         card->private_free = snd_cx88_dev_free;
 752
 753         err = snd_cx88_create(card, pci, &chip);
 754         if (err < 0)
 755                 return (err);
 756
 757         err = snd_cx88_pcm(chip, 0, "CX88 Digital");
 758
 759         if (err < 0) {
 760                 snd_card_free(card);
 761                 return (err);
 762         }
 763
 764         err = snd_ctl_add(card, snd_ctl_new1(&snd_cx88_capture_volume, chip));
 765         if (err < 0) {
 766                 snd_card_free(card);
 767                 return (err);
 768         }
 769
 770         strcpy (card->driver, "CX88x");
 771         sprintf(card->shortname, "Conexant CX%x", pci->device);
 772         sprintf(card->longname, "%s at %#llx",
 773                 card->shortname,(unsigned long long)pci_resource_start(pci, 0));
 774         strcpy (card->mixername, "CX88");
 775
 776         dprintk (0, "%s/%i: ALSA support for cx2388x boards\n",
 777                card->driver,devno);
 778
 779         err = snd_card_register(card);
 780         if (err < 0) {
 781                 snd_card_free(card);
 782                 return (err);
 783         }
 784         snd_cx88_cards[devno] = card;
 785
 786         pci_set_drvdata(pci,card);
 787
 788         devno++;
 789         return 0;
 790 }
 791 /*
 792  * ALSA destructor
 793  */
 794 static void __devexit cx88_audio_finidev(struct pci_dev *pci)
 795 {
 796         struct cx88_audio_dev *card = pci_get_drvdata(pci);
 797
 798         snd_card_free((void *)card);
 799
 800         pci_set_drvdata(pci, NULL);
 801
 802         devno--;
 803 }
 804
 805 /*
 806  * PCI driver definition
 807  */
 808
 809 static struct pci_driver cx88_audio_pci_driver = {
 810         .name     = "cx88_audio",
 811         .id_table = cx88_audio_pci_tbl,
 812         .probe    = cx88_audio_initdev,
 813         .remove   = cx88_audio_finidev,
 814 };
 815
 816 /****************************************************************************
 817                                 LINUX MODULE INIT
 818  ****************************************************************************/
 819
 820 /*
 821  * module init
 822  */
 823 static int cx88_audio_init(void)
 824 {
 825         printk(KERN_INFO "cx2388x alsa driver version %d.%d.%d loaded\n",
 826                (CX88_VERSION_CODE >> 16) & 0xff,
 827                (CX88_VERSION_CODE >>  8) & 0xff,
 828                CX88_VERSION_CODE & 0xff);
 829 #ifdef SNAPSHOT
 830         printk(KERN_INFO "cx2388x: snapshot date %04d-%02d-%02d\n",
 831                SNAPSHOT/10000, (SNAPSHOT/100)%100, SNAPSHOT%100);
 832 #endif
 833         return pci_register_driver(&cx88_audio_pci_driver);
 834 }
 835
 836 /*
 837  * module remove
 838  */
 839 static void cx88_audio_fini(void)
 840 {
 841
 842         pci_unregister_driver(&cx88_audio_pci_driver);
 843 }
 844
 845 module_init(cx88_audio_init);
 846 module_exit(cx88_audio_fini);
 847
 848 /* ----------------------------------------------------------- */
 849 /*
 850  * Local variables:
 851  * c-basic-offset: 8
 852  * End:
 853  */