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@brturbo.com.br>
   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 <asm/delay.h>
  31 #include <sound/driver.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
  38 #include "cx88.h"
  39 #include "cx88-reg.h"
  40
  41 #define dprintk(level,fmt, arg...)      if (debug >= level) \
  42         printk(KERN_INFO "%s/1: " fmt, chip->core->name , ## arg)
  43
  44 #define dprintk_core(level,fmt, arg...) if (debug >= level) \
  45         printk(KERN_DEBUG "%s/1: " fmt, chip->core->name , ## arg)
  46
  47
  48 /****************************************************************************
  49         Data type declarations - Can be moded to a header file later
  50  ****************************************************************************/
  51
  52 /* These can be replaced after done */
  53 #define MIXER_ADDR_LAST MAX_CX88_INPUT
  54
  55 struct cx88_audio_dev {
  56         struct cx88_core           *core;
  57         struct cx88_dmaqueue       q;
  58
  59         /* pci i/o */
  60         struct pci_dev             *pci;
  61         unsigned char              pci_rev,pci_lat;
  62
  63         /* audio controls */
  64         int                        irq;
  65
  66         snd_card_t                 *card;
  67
  68         spinlock_t                 reg_lock;
  69
  70         unsigned int               dma_size;
  71         unsigned int               period_size;
  72         unsigned int               num_periods;
  73
  74         struct videobuf_dmabuf dma_risc;
  75
  76         int                        mixer_volume[MIXER_ADDR_LAST+1][2];
  77         int                        capture_source[MIXER_ADDR_LAST+1][2];
  78
  79         long int read_count;
  80         long int read_offset;
  81
  82         struct cx88_buffer   *buf;
  83
  84         long opened;
  85         snd_pcm_substream_t *substream;
  86
  87 };
  88 typedef struct cx88_audio_dev snd_cx88_card_t;
  89
  90
  91
  92 /****************************************************************************
  93                         Module global static vars
  94  ****************************************************************************/
  95
  96 static int index[SNDRV_CARDS] = SNDRV_DEFAULT_IDX;      /* Index 0-MAX */
  97 static char *id[SNDRV_CARDS] = SNDRV_DEFAULT_STR;       /* ID for this card */
  98 static int enable[SNDRV_CARDS] = {1, [1 ... (SNDRV_CARDS - 1)] = 1};
  99 static snd_card_t *snd_cx88_cards[SNDRV_CARDS];
 100
 101 module_param_array(enable, bool, NULL, 0444);
 102 MODULE_PARM_DESC(enable, "Enable cx88x soundcard. default enabled.");
 103
 104 module_param_array(index, int, NULL, 0444);
 105 MODULE_PARM_DESC(index, "Index value for cx88x capture interface(s).");
 106
 107
 108 /****************************************************************************
 109                                 Module macros
 110  ****************************************************************************/
 111
 112 MODULE_DESCRIPTION("ALSA driver module for cx2388x based TV cards");
 113 MODULE_AUTHOR("Ricardo Cerqueira");
 114 MODULE_AUTHOR("Mauro Carvalho Chehab <mchehab@brturbo.com.br>");
 115 MODULE_LICENSE("GPL");
 116 MODULE_SUPPORTED_DEVICE("{{Conexant,23881},"
 117                         "{{Conexant,23882},"
 118                         "{{Conexant,23883}");
 119 static unsigned int debug;
 120 module_param(debug,int,0644);
 121 MODULE_PARM_DESC(debug,"enable debug messages");
 122
 123 /****************************************************************************
 124                         Module specific funtions
 125  ****************************************************************************/
 126
 127 /*
 128  * BOARD Specific: Sets audio DMA
 129  */
 130
 131 static int _cx88_start_audio_dma(snd_cx88_card_t *chip)
 132 {
 133         struct cx88_buffer   *buf = chip->buf;
 134         struct cx88_core *core=chip->core;
 135         struct sram_channel *audio_ch = &cx88_sram_channels[SRAM_CH25];
 136
 137
 138         dprintk(1, "Starting audio DMA for %i bytes/line and %i (%i) lines at address %08x\n",buf->bpl, chip->num_periods, audio_ch->fifo_size / buf->bpl, audio_ch->fifo_start);
 139
 140         /* setup fifo + format - out channel */
 141         cx88_sram_channel_setup(chip->core, &cx88_sram_channels[SRAM_CH25],
 142                                 buf->bpl, buf->risc.dma);
 143
 144         /* sets bpl size */
 145         cx_write(MO_AUDD_LNGTH, buf->bpl);
 146
 147         /* reset counter */
 148         cx_write(MO_AUDD_GPCNTRL,GP_COUNT_CONTROL_RESET);
 149
 150         dprintk(1,"Enabling IRQ, setting mask from 0x%x to 0x%x\n",chip->core->pci_irqmask,(chip->core->pci_irqmask | 0x02));
 151         /* enable irqs */
 152         cx_set(MO_PCI_INTMSK, chip->core->pci_irqmask | 0x02);
 153
 154
 155         /* Enables corresponding bits at AUD_INT_STAT */
 156         cx_write(MO_AUD_INTMSK,
 157                         (1<<16)|
 158                         (1<<12)|
 159                         (1<<4)|
 160                         (1<<0)
 161                         );
 162
 163         /* start dma */
 164         cx_set(MO_DEV_CNTRL2, (1<<5)); /* Enables Risc Processor */
 165         cx_set(MO_AUD_DMACNTRL, 0x11); /* audio downstream FIFO and RISC enable */
 166
 167         if (debug)
 168                 cx88_sram_channel_dump(chip->core, &cx88_sram_channels[SRAM_CH25]);
 169
 170         return 0;
 171 }
 172
 173 /*
 174  * BOARD Specific: Resets audio DMA
 175  */
 176 static int _cx88_stop_audio_dma(snd_cx88_card_t *chip)
 177 {
 178         struct cx88_core *core=chip->core;
 179         dprintk(1, "Stopping audio DMA\n");
 180
 181         /* stop dma */
 182         cx_clear(MO_AUD_DMACNTRL, 0x11);
 183
 184         /* disable irqs */
 185         cx_clear(MO_PCI_INTMSK, 0x02);
 186         cx_clear(MO_AUD_INTMSK,
 187                         (1<<16)|
 188                         (1<<12)|
 189                         (1<<4)|
 190                         (1<<0)
 191                         );
 192
 193         if (debug)
 194                 cx88_sram_channel_dump(chip->core, &cx88_sram_channels[SRAM_CH25]);
 195
 196         return 0;
 197 }
 198
 199 #define MAX_IRQ_LOOP 10
 200
 201 /*
 202  * BOARD Specific: IRQ dma bits
 203  */
 204 static char *cx88_aud_irqs[32] = {
 205         "dn_risci1", "up_risci1", "rds_dn_risc1", /* 0-2 */
 206         NULL,                                     /* reserved */
 207         "dn_risci2", "up_risci2", "rds_dn_risc2", /* 4-6 */
 208         NULL,                                     /* reserved */
 209         "dnf_of", "upf_uf", "rds_dnf_uf",         /* 8-10 */
 210         NULL,                                     /* reserved */
 211         "dn_sync", "up_sync", "rds_dn_sync",      /* 12-14 */
 212         NULL,                                     /* reserved */
 213         "opc_err", "par_err", "rip_err",          /* 16-18 */
 214         "pci_abort", "ber_irq", "mchg_irq"        /* 19-21 */
 215 };
 216
 217 /*
 218  * BOARD Specific: Threats IRQ audio specific calls
 219  */
 220 static void cx8801_aud_irq(snd_cx88_card_t *chip)
 221 {
 222         struct cx88_core *core = chip->core;
 223         u32 status, mask;
 224         u32 count;
 225
 226         status = cx_read(MO_AUD_INTSTAT);
 227         mask   = cx_read(MO_AUD_INTMSK);
 228         if (0 == (status & mask)) {
 229                 spin_unlock(&chip->reg_lock);
 230                 return;
 231         }
 232         cx_write(MO_AUD_INTSTAT, status);
 233         if (debug > 1  ||  (status & mask & ~0xff))
 234                 cx88_print_irqbits(core->name, "irq aud",
 235                                    cx88_aud_irqs, status, mask);
 236         /* risc op code error */
 237         if (status & (1 << 16)) {
 238                 printk(KERN_WARNING "%s/0: audio risc op code error\n",core->name);
 239                 cx_clear(MO_AUD_DMACNTRL, 0x11);
 240                 cx88_sram_channel_dump(core, &cx88_sram_channels[SRAM_CH25]);
 241         }
 242
 243         /* risc1 downstream */
 244         if (status & 0x01) {
 245                 spin_lock(&chip->reg_lock);
 246                 count = cx_read(MO_AUDD_GPCNT);
 247                 spin_unlock(&chip->reg_lock);
 248                 if (chip->read_count == 0)
 249                         chip->read_count += chip->dma_size;
 250         }
 251
 252         if  (chip->read_count >= chip->period_size) {
 253                 dprintk(2, "Elapsing period\n");
 254                 snd_pcm_period_elapsed(chip->substream);
 255         }
 256
 257         dprintk(3,"Leaving audio IRQ handler...\n");
 258
 259         /* FIXME: Any other status should deserve a special handling? */
 260 }
 261
 262 /*
 263  * BOARD Specific: Handles IRQ calls
 264  */
 265 static irqreturn_t cx8801_irq(int irq, void *dev_id, struct pt_regs *regs)
 266 {
 267         snd_cx88_card_t *chip = dev_id;
 268         struct cx88_core *core = chip->core;
 269         u32 status;
 270         int loop, handled = 0;
 271
 272         for (loop = 0; loop < MAX_IRQ_LOOP; loop++) {
 273                 status = cx_read(MO_PCI_INTSTAT) & (core->pci_irqmask | 0x02);
 274                 if (0 == status)
 275                         goto out;
 276                 dprintk( 3, "cx8801_irq\n" );
 277                 dprintk( 3, "    loop: %d/%d\n", loop, MAX_IRQ_LOOP );
 278                 dprintk( 3, "    status: %d\n", status );
 279                 handled = 1;
 280                 cx_write(MO_PCI_INTSTAT, status);
 281
 282                 if (status & 0x02)
 283                 {
 284                         dprintk( 2, "    ALSA IRQ handling\n" );
 285                         cx8801_aud_irq(chip);
 286                 }
 287         };
 288
 289         if (MAX_IRQ_LOOP == loop) {
 290                 dprintk( 0, "clearing mask\n" );
 291                 dprintk(1,"%s/0: irq loop -- clearing mask\n",
 292                        core->name);
 293                 cx_clear(MO_PCI_INTMSK,0x02);
 294         }
 295
 296  out:
 297         return IRQ_RETVAL(handled);
 298 }
 299
 300
 301 static int dsp_buffer_free(snd_cx88_card_t *chip)
 302 {
 303         BUG_ON(!chip->dma_size);
 304
 305         dprintk(2,"Freeing buffer\n");
 306         videobuf_dma_pci_unmap(chip->pci, &chip->dma_risc);
 307         videobuf_dma_free(&chip->dma_risc);
 308         btcx_riscmem_free(chip->pci,&chip->buf->risc);
 309         kfree(chip->buf);
 310
 311         chip->dma_size = 0;
 312
 313        return 0;
 314 }
 315
 316 /****************************************************************************
 317                                 ALSA PCM Interface
 318  ****************************************************************************/
 319
 320 /*
 321  * Digital hardware definition
 322  */
 323 static snd_pcm_hardware_t snd_cx88_digital_hw = {
 324         .info = SNDRV_PCM_INFO_MMAP |
 325                 SNDRV_PCM_INFO_INTERLEAVED |
 326                 SNDRV_PCM_INFO_BLOCK_TRANSFER |
 327                 SNDRV_PCM_INFO_MMAP_VALID,
 328         .formats = SNDRV_PCM_FMTBIT_S16_LE,
 329
 330         .rates =                SNDRV_PCM_RATE_48000,
 331         .rate_min =             48000,
 332         .rate_max =             48000,
 333         .channels_min = 1,
 334         .channels_max = 2,
 335         .buffer_bytes_max = (2*2048),
 336         .period_bytes_min = 2048,
 337         .period_bytes_max = 2048,
 338         .periods_min = 2,
 339         .periods_max = 2,
 340 };
 341
 342 /*
 343  * audio pcm capture runtime free
 344  */
 345 static void snd_card_cx88_runtime_free(snd_pcm_runtime_t *runtime)
 346 {
 347 }
 348 /*
 349  * audio pcm capture open callback
 350  */
 351 static int snd_cx88_pcm_open(snd_pcm_substream_t *substream)
 352 {
 353         snd_cx88_card_t *chip = snd_pcm_substream_chip(substream);
 354         snd_pcm_runtime_t *runtime = substream->runtime;
 355         int err;
 356
 357         if (test_and_set_bit(0, &chip->opened))
 358                 return -EBUSY;
 359
 360         err = snd_pcm_hw_constraint_integer(runtime, SNDRV_PCM_HW_PARAM_PERIODS);
 361         if (err < 0)
 362                 goto _error;
 363
 364         chip->substream = substream;
 365
 366         chip->read_count = 0;
 367         chip->read_offset = 0;
 368
 369         runtime->private_free = snd_card_cx88_runtime_free;
 370         runtime->hw = snd_cx88_digital_hw;
 371
 372         return 0;
 373 _error:
 374         dprintk(1,"Error opening PCM!\n");
 375         clear_bit(0, &chip->opened);
 376         smp_mb__after_clear_bit();
 377         return err;
 378 }
 379
 380 /*
 381  * audio close callback
 382  */
 383 static int snd_cx88_close(snd_pcm_substream_t *substream)
 384 {
 385         snd_cx88_card_t *chip = snd_pcm_substream_chip(substream);
 386
 387         clear_bit(0, &chip->opened);
 388         smp_mb__after_clear_bit();
 389
 390         return 0;
 391 }
 392
 393 /*
 394  * hw_params callback
 395  */
 396 static int snd_cx88_hw_params(snd_pcm_substream_t * substream,
 397                                  snd_pcm_hw_params_t * hw_params)
 398 {
 399         snd_cx88_card_t *chip = snd_pcm_substream_chip(substream);
 400         struct cx88_buffer *buf;
 401
 402         if (substream->runtime->dma_area) {
 403                 dsp_buffer_free(chip);
 404                 substream->runtime->dma_area = NULL;
 405         }
 406
 407
 408         chip->period_size = params_period_bytes(hw_params);
 409         chip->num_periods = params_periods(hw_params);
 410         chip->dma_size = chip->period_size * params_periods(hw_params);
 411
 412         BUG_ON(!chip->dma_size);
 413
 414         dprintk(1,"Setting buffer\n");
 415
 416         buf = kmalloc(sizeof(*buf),GFP_KERNEL);
 417         if (NULL == buf)
 418                 return -ENOMEM;
 419         memset(buf,0,sizeof(*buf));
 420
 421
 422         buf->vb.memory = V4L2_MEMORY_MMAP;
 423         buf->vb.width  = chip->period_size;
 424         buf->vb.height = chip->num_periods;
 425         buf->vb.size   = chip->dma_size;
 426         buf->vb.field  = V4L2_FIELD_NONE;
 427
 428         videobuf_dma_init(&buf->vb.dma);
 429         videobuf_dma_init_kernel(&buf->vb.dma,PCI_DMA_FROMDEVICE,
 430                         (PAGE_ALIGN(buf->vb.size) >> PAGE_SHIFT));
 431
 432         videobuf_dma_pci_map(chip->pci,&buf->vb.dma);
 433
 434
 435         cx88_risc_databuffer(chip->pci, &buf->risc,
 436                         buf->vb.dma.sglist,
 437                         buf->vb.width, buf->vb.height);
 438
 439         buf->risc.jmp[0] = cpu_to_le32(RISC_JUMP | RISC_IRQ1 | RISC_CNT_INC);
 440         buf->risc.jmp[1] = cpu_to_le32(buf->risc.dma);
 441
 442         buf->vb.state = STATE_PREPARED;
 443
 444         buf->bpl = chip->period_size;
 445         chip->buf = buf;
 446         chip->dma_risc = buf->vb.dma;
 447
 448         dprintk(1,"Buffer ready at %u\n",chip->dma_risc.nr_pages);
 449         substream->runtime->dma_area = chip->dma_risc.vmalloc;
 450         return 0;
 451 }
 452
 453 /*
 454  * hw free callback
 455  */
 456 static int snd_cx88_hw_free(snd_pcm_substream_t * substream)
 457 {
 458
 459         snd_cx88_card_t *chip = snd_pcm_substream_chip(substream);
 460
 461         if (substream->runtime->dma_area) {
 462                 dsp_buffer_free(chip);
 463                 substream->runtime->dma_area = NULL;
 464         }
 465
 466         return 0;
 467 }
 468
 469 /*
 470  * prepare callback
 471  */
 472 static int snd_cx88_prepare(snd_pcm_substream_t *substream)
 473 {
 474         return 0;
 475 }
 476
 477
 478 /*
 479  * trigger callback
 480  */
 481 static int snd_cx88_card_trigger(snd_pcm_substream_t *substream, int cmd)
 482 {
 483         snd_cx88_card_t *chip = snd_pcm_substream_chip(substream);
 484         int err;
 485
 486         spin_lock(&chip->reg_lock);
 487
 488         switch (cmd) {
 489         case SNDRV_PCM_TRIGGER_START:
 490                 err=_cx88_start_audio_dma(chip);
 491                 break;
 492         case SNDRV_PCM_TRIGGER_STOP:
 493                 err=_cx88_stop_audio_dma(chip);
 494                 break;
 495         default:
 496                 err=-EINVAL;
 497                 break;
 498         }
 499
 500         spin_unlock(&chip->reg_lock);
 501
 502         return err;
 503 }
 504
 505 /*
 506  * pointer callback
 507  */
 508 static snd_pcm_uframes_t snd_cx88_pointer(snd_pcm_substream_t *substream)
 509 {
 510         snd_cx88_card_t *chip = snd_pcm_substream_chip(substream);
 511         snd_pcm_runtime_t *runtime = substream->runtime;
 512
 513         if (chip->read_count) {
 514                 chip->read_count -= snd_pcm_lib_period_bytes(substream);
 515                 chip->read_offset += snd_pcm_lib_period_bytes(substream);
 516                 if (chip->read_offset == chip->dma_size)
 517                         chip->read_offset = 0;
 518         }
 519
 520         dprintk(2, "Pointer time, will return %li, read %li\n",chip->read_offset,chip->read_count);
 521         return bytes_to_frames(runtime, chip->read_offset);
 522
 523 }
 524
 525 /*
 526  * operators
 527  */
 528 static snd_pcm_ops_t snd_cx88_pcm_ops = {
 529         .open = snd_cx88_pcm_open,
 530         .close = snd_cx88_close,
 531         .ioctl = snd_pcm_lib_ioctl,
 532         .hw_params = snd_cx88_hw_params,
 533         .hw_free = snd_cx88_hw_free,
 534         .prepare = snd_cx88_prepare,
 535         .trigger = snd_cx88_card_trigger,
 536         .pointer = snd_cx88_pointer,
 537 };
 538
 539 /*
 540  * create a PCM device
 541  */
 542 static int __devinit snd_cx88_pcm(snd_cx88_card_t *chip, int device, char *name)
 543 {
 544         int err;
 545         snd_pcm_t *pcm;
 546
 547         err = snd_pcm_new(chip->card, name, device, 0, 1, &pcm);
 548         if (err < 0)
 549                 return err;
 550         pcm->private_data = chip;
 551         strcpy(pcm->name, name);
 552         snd_pcm_set_ops(pcm, SNDRV_PCM_STREAM_CAPTURE, &snd_cx88_pcm_ops);
 553
 554         return 0;
 555 }
 556
 557 /****************************************************************************
 558                                 CONTROL INTERFACE
 559  ****************************************************************************/
 560 static int snd_cx88_capture_volume_info(snd_kcontrol_t *kcontrol, snd_ctl_elem_info_t *info)
 561 {
 562         info->type = SNDRV_CTL_ELEM_TYPE_INTEGER;
 563         info->count = 1;
 564         info->value.integer.min = 0;
 565         info->value.integer.max = 0x3f;
 566
 567         return 0;
 568 }
 569
 570 /* OK - TODO: test it */
 571 static int snd_cx88_capture_volume_get(snd_kcontrol_t *kcontrol, snd_ctl_elem_value_t *value)
 572 {
 573         snd_cx88_card_t *chip = snd_kcontrol_chip(kcontrol);
 574         struct cx88_core *core=chip->core;
 575
 576         value->value.integer.value[0] = 0x3f - (cx_read(AUD_VOL_CTL) & 0x3f);
 577
 578         return 0;
 579 }
 580
 581 /* OK - TODO: test it */
 582 static int snd_cx88_capture_volume_put(snd_kcontrol_t *kcontrol, snd_ctl_elem_value_t *value)
 583 {
 584         snd_cx88_card_t *chip = snd_kcontrol_chip(kcontrol);
 585         struct cx88_core *core=chip->core;
 586         int v;
 587         u32 old_control;
 588
 589         spin_lock_irq(&chip->reg_lock);
 590         old_control = 0x3f - (cx_read(AUD_VOL_CTL) & 0x3f);
 591         v = 0x3f - (value->value.integer.value[0] & 0x3f);
 592         cx_andor(AUD_VOL_CTL, 0x3f, v);
 593         spin_unlock_irq(&chip->reg_lock);
 594
 595         return v != old_control;
 596 }
 597
 598 static snd_kcontrol_new_t snd_cx88_capture_volume = {
 599         .iface = SNDRV_CTL_ELEM_IFACE_MIXER,
 600         .name = "Capture Volume",
 601         .info = snd_cx88_capture_volume_info,
 602         .get = snd_cx88_capture_volume_get,
 603         .put = snd_cx88_capture_volume_put,
 604 };
 605
 606
 607 /****************************************************************************
 608                         Basic Flow for Sound Devices
 609  ****************************************************************************/
 610
 611 /*
 612  * PCI ID Table - 14f1:8801 and 14f1:8811 means function 1: Audio
 613  * Only boards with eeprom and byte 1 at eeprom=1 have it
 614  */
 615
 616 static struct pci_device_id cx88_audio_pci_tbl[] = {
 617         {0x14f1,0x8801,PCI_ANY_ID,PCI_ANY_ID,0,0,0},
 618         {0x14f1,0x8811,PCI_ANY_ID,PCI_ANY_ID,0,0,0},
 619         {0, }
 620 };
 621 MODULE_DEVICE_TABLE(pci, cx88_audio_pci_tbl);
 622
 623 /*
 624  * Chip-specific destructor
 625  */
 626
 627 static int snd_cx88_free(snd_cx88_card_t *chip)
 628 {
 629
 630         if (chip->irq >= 0){
 631                 synchronize_irq(chip->irq);
 632                 free_irq(chip->irq, chip);
 633         }
 634
 635         cx88_core_put(chip->core,chip->pci);
 636
 637         pci_disable_device(chip->pci);
 638         return 0;
 639 }
 640
 641 /*
 642  * Component Destructor
 643  */
 644 static void snd_cx88_dev_free(snd_card_t * card)
 645 {
 646         snd_cx88_card_t *chip = card->private_data;
 647
 648         snd_cx88_free(chip);
 649 }
 650
 651
 652 /*
 653  * Alsa Constructor - Component probe
 654  */
 655
 656 static int devno;
 657 static int __devinit snd_cx88_create(snd_card_t *card, struct pci_dev *pci,
 658                                     snd_cx88_card_t **rchip)
 659 {
 660         snd_cx88_card_t   *chip;
 661         struct cx88_core  *core;
 662         int               err;
 663
 664         *rchip = NULL;
 665
 666         err = pci_enable_device(pci);
 667         if (err < 0)
 668                 return err;
 669
 670         pci_set_master(pci);
 671
 672         chip = (snd_cx88_card_t *) card->private_data;
 673
 674         core = cx88_core_get(pci);
 675
 676         if (!pci_dma_supported(pci,0xffffffff)) {
 677                 dprintk(0, "%s/1: Oops: no 32bit PCI DMA ???\n",core->name);
 678                 err = -EIO;
 679                 cx88_core_put(core,pci);
 680                 return err;
 681         }
 682
 683
 684         /* pci init */
 685         chip->card = card;
 686         chip->pci = pci;
 687         chip->irq = -1;
 688         spin_lock_init(&chip->reg_lock);
 689
 690         cx88_reset(core);
 691         if (NULL == core) {
 692                 err = -EINVAL;
 693                 kfree (chip);
 694                 return err;
 695         }
 696         chip->core = core;
 697
 698         /* get irq */
 699         err = request_irq(chip->pci->irq, cx8801_irq,
 700                           SA_SHIRQ | SA_INTERRUPT, chip->core->name, chip);
 701         if (err < 0) {
 702                 dprintk(0, "%s: can't get IRQ %d\n",
 703                        chip->core->name, chip->pci->irq);
 704                 return err;
 705         }
 706
 707         /* print pci info */
 708         pci_read_config_byte(pci, PCI_CLASS_REVISION, &chip->pci_rev);
 709         pci_read_config_byte(pci, PCI_LATENCY_TIMER,  &chip->pci_lat);
 710
 711         dprintk(1,"ALSA %s/%i: found at %s, rev: %d, irq: %d, "
 712                "latency: %d, mmio: 0x%lx\n", core->name, devno,
 713                pci_name(pci), chip->pci_rev, pci->irq,
 714                chip->pci_lat,pci_resource_start(pci,0));
 715
 716         chip->irq = pci->irq;
 717         synchronize_irq(chip->irq);
 718
 719         snd_card_set_dev(card, &pci->dev);
 720
 721         *rchip = chip;
 722
 723         return 0;
 724 }
 725
 726 static int __devinit cx88_audio_initdev(struct pci_dev *pci,
 727                                     const struct pci_device_id *pci_id)
 728 {
 729         snd_card_t       *card;
 730         snd_cx88_card_t  *chip;
 731         int              err;
 732
 733         if (devno >= SNDRV_CARDS)
 734                 return (-ENODEV);
 735
 736         if (!enable[devno]) {
 737                 ++devno;
 738                 return (-ENOENT);
 739         }
 740
 741         card = snd_card_new(index[devno], id[devno], THIS_MODULE, sizeof(snd_cx88_card_t));
 742         if (!card)
 743                 return (-ENOMEM);
 744
 745         card->private_free = snd_cx88_dev_free;
 746
 747         err = snd_cx88_create(card, pci, &chip);
 748         if (err < 0)
 749                 return (err);
 750
 751         err = snd_cx88_pcm(chip, 0, "CX88 Digital");
 752
 753         if (err < 0) {
 754                 snd_card_free(card);
 755                 return (err);
 756         }
 757
 758         err = snd_ctl_add(card, snd_ctl_new1(&snd_cx88_capture_volume, chip));
 759         if (err < 0) {
 760                 snd_card_free(card);
 761                 return (err);
 762         }
 763
 764         strcpy (card->driver, "CX88x");
 765         sprintf(card->shortname, "Conexant CX%x", pci->device);
 766         sprintf(card->longname, "%s at %#lx",
 767                 card->shortname, pci_resource_start(pci, 0));
 768         strcpy (card->mixername, "CX88");
 769
 770         dprintk (0, "%s/%i: ALSA support for cx2388x boards\n",
 771                card->driver,devno);
 772
 773         err = snd_card_register(card);
 774         if (err < 0) {
 775                 snd_card_free(card);
 776                 return (err);
 777         }
 778         snd_cx88_cards[devno] = card;
 779
 780         pci_set_drvdata(pci,card);
 781
 782         devno++;
 783         return 0;
 784 }
 785 /*
 786  * ALSA destructor
 787  */
 788 static void __devexit cx88_audio_finidev(struct pci_dev *pci)
 789 {
 790         struct cx88_audio_dev *card = pci_get_drvdata(pci);
 791
 792         snd_card_free((void *)card);
 793
 794         pci_set_drvdata(pci, NULL);
 795
 796         devno--;
 797 }
 798
 799 /*
 800  * PCI driver definition
 801  */
 802
 803 static struct pci_driver cx88_audio_pci_driver = {
 804         .name     = "cx88_audio",
 805         .id_table = cx88_audio_pci_tbl,
 806         .probe    = cx88_audio_initdev,
 807         .remove   = cx88_audio_finidev,
 808 };
 809
 810 /****************************************************************************
 811                                 LINUX MODULE INIT
 812  ****************************************************************************/
 813
 814 /*
 815  * module init
 816  */
 817 static int cx88_audio_init(void)
 818 {
 819         printk(KERN_INFO "cx2388x alsa driver version %d.%d.%d loaded\n",
 820                (CX88_VERSION_CODE >> 16) & 0xff,
 821                (CX88_VERSION_CODE >>  8) & 0xff,
 822                CX88_VERSION_CODE & 0xff);
 823 #ifdef SNAPSHOT
 824         printk(KERN_INFO "cx2388x: snapshot date %04d-%02d-%02d\n",
 825                SNAPSHOT/10000, (SNAPSHOT/100)%100, SNAPSHOT%100);
 826 #endif
 827         return pci_register_driver(&cx88_audio_pci_driver);
 828 }
 829
 830 /*
 831  * module remove
 832  */
 833 static void cx88_audio_fini(void)
 834 {
 835
 836         pci_unregister_driver(&cx88_audio_pci_driver);
 837 }
 838
 839 module_init(cx88_audio_init);
 840 module_exit(cx88_audio_fini);
 841
 842 /* ----------------------------------------------------------- */
 843 /*
 844  * Local variables:
 845  * c-basic-offset: 8
 846  * End:
 847  */