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

   1 /*
   2  *
   3  *  Support for audio capture
   4  *  PCI function #1 of the cx2388x.
   5  *
   6  *    (c) 2007 Trent Piepho <xyzzy@speakeasy.org>
   7  *    (c) 2005,2006 Ricardo Cerqueira <v4l@cerqueira.org>
   8  *    (c) 2005 Mauro Carvalho Chehab <mchehab@infradead.org>
   9  *    Based on a dummy cx88 module by Gerd Knorr <kraxel@bytesex.org>
  10  *    Based on dummy.c by Jaroslav Kysela <perex@perex.cz>
  11  *
  12  *  This program is free software; you can redistribute it and/or modify
  13  *  it under the terms of the GNU General Public License as published by
  14  *  the Free Software Foundation; either version 2 of the License, or
  15  *  (at your option) any later version.
  16  *
  17  *  This program is distributed in the hope that it will be useful,
  18  *  but WITHOUT ANY WARRANTY; without even the implied warranty of
  19  *  MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
  20  *  GNU General Public License for more details.
  21  *
  22  *  You should have received a copy of the GNU General Public License
  23  *  along with this program; if not, write to the Free Software
  24  *  Foundation, Inc., 675 Mass Ave, Cambridge, MA 02139, USA.
  25  */
  26
  27 #include <linux/module.h>
  28 #include <linux/init.h>
  29 #include <linux/device.h>
  30 #include <linux/interrupt.h>
  31 #include <linux/vmalloc.h>
  32 #include <linux/dma-mapping.h>
  33 #include <linux/pci.h>
  34
  35 #include <asm/delay.h>
  36 #include <sound/driver.h>
  37 #include <sound/core.h>
  38 #include <sound/pcm.h>
  39 #include <sound/pcm_params.h>
  40 #include <sound/control.h>
  41 #include <sound/initval.h>
  42 #include <sound/tlv.h>
  43
  44 #include "cx88.h"
  45 #include "cx88-reg.h"
  46
  47 #define dprintk(level,fmt, arg...)      if (debug >= level) \
  48         printk(KERN_INFO "%s/1: " fmt, chip->core->name , ## arg)
  49
  50 #define dprintk_core(level,fmt, arg...) if (debug >= level) \
  51         printk(KERN_DEBUG "%s/1: " fmt, chip->core->name , ## arg)
  52
  53 /****************************************************************************
  54         Data type declarations - Can be moded to a header file later
  55  ****************************************************************************/
  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
  64         /* audio controls */
  65         int                        irq;
  66
  67         struct snd_card            *card;
  68
  69         spinlock_t                 reg_lock;
  70         atomic_t                   count;
  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         struct cx88_buffer         *buf;
  79
  80         struct snd_pcm_substream   *substream;
  81 };
  82 typedef struct cx88_audio_dev snd_cx88_card_t;
  83
  84
  85
  86
  87 /****************************************************************************
  88                         Module global static vars
  89  ****************************************************************************/
  90
  91 static int index[SNDRV_CARDS] = SNDRV_DEFAULT_IDX;      /* Index 0-MAX */
  92 static char *id[SNDRV_CARDS] = SNDRV_DEFAULT_STR;       /* ID for this card */
  93 static int enable[SNDRV_CARDS] = {1, [1 ... (SNDRV_CARDS - 1)] = 1};
  94
  95 module_param_array(enable, bool, NULL, 0444);
  96 MODULE_PARM_DESC(enable, "Enable cx88x soundcard. default enabled.");
  97
  98 module_param_array(index, int, NULL, 0444);
  99 MODULE_PARM_DESC(index, "Index value for cx88x capture interface(s).");
 100
 101
 102 /****************************************************************************
 103                                 Module macros
 104  ****************************************************************************/
 105
 106 MODULE_DESCRIPTION("ALSA driver module for cx2388x based TV cards");
 107 MODULE_AUTHOR("Ricardo Cerqueira");
 108 MODULE_AUTHOR("Mauro Carvalho Chehab <mchehab@infradead.org>");
 109 MODULE_LICENSE("GPL");
 110 MODULE_SUPPORTED_DEVICE("{{Conexant,23881},"
 111                         "{{Conexant,23882},"
 112                         "{{Conexant,23883}");
 113 static unsigned int debug;
 114 module_param(debug,int,0644);
 115 MODULE_PARM_DESC(debug,"enable debug messages");
 116
 117 /****************************************************************************
 118                         Module specific funtions
 119  ****************************************************************************/
 120
 121 /*
 122  * BOARD Specific: Sets audio DMA
 123  */
 124
 125 static int _cx88_start_audio_dma(snd_cx88_card_t *chip)
 126 {
 127         struct cx88_buffer   *buf = chip->buf;
 128         struct cx88_core *core=chip->core;
 129         struct sram_channel *audio_ch = &cx88_sram_channels[SRAM_CH25];
 130
 131         /* Make sure RISC/FIFO are off before changing FIFO/RISC settings */
 132         cx_clear(MO_AUD_DMACNTRL, 0x11);
 133
 134         /* setup fifo + format - out channel */
 135         cx88_sram_channel_setup(chip->core, audio_ch, buf->bpl, buf->risc.dma);
 136
 137         /* sets bpl size */
 138         cx_write(MO_AUDD_LNGTH, buf->bpl);
 139
 140         /* reset counter */
 141         cx_write(MO_AUDD_GPCNTRL, GP_COUNT_CONTROL_RESET);
 142         atomic_set(&chip->count, 0);
 143
 144         dprintk(1, "Start audio DMA, %d B/line, %d lines/FIFO, %d periods, %d "
 145                 "byte buffer\n", buf->bpl, cx_read(audio_ch->cmds_start + 8)>>1,
 146                 chip->num_periods, buf->bpl * chip->num_periods);
 147
 148         /* Enables corresponding bits at AUD_INT_STAT */
 149         cx_write(MO_AUD_INTMSK, AUD_INT_OPC_ERR | AUD_INT_DN_SYNC |
 150                                 AUD_INT_DN_RISCI2 | AUD_INT_DN_RISCI1);
 151
 152         /* Clean any pending interrupt bits already set */
 153         cx_write(MO_AUD_INTSTAT, ~0);
 154
 155         /* enable audio irqs */
 156         cx_set(MO_PCI_INTMSK, chip->core->pci_irqmask | PCI_INT_AUDINT);
 157
 158         /* start dma */
 159         cx_set(MO_DEV_CNTRL2, (1<<5)); /* Enables Risc Processor */
 160         cx_set(MO_AUD_DMACNTRL, 0x11); /* audio downstream FIFO and RISC enable */
 161
 162         if (debug)
 163                 cx88_sram_channel_dump(chip->core, audio_ch);
 164
 165         return 0;
 166 }
 167
 168 /*
 169  * BOARD Specific: Resets audio DMA
 170  */
 171 static int _cx88_stop_audio_dma(snd_cx88_card_t *chip)
 172 {
 173         struct cx88_core *core=chip->core;
 174         dprintk(1, "Stopping audio DMA\n");
 175
 176         /* stop dma */
 177         cx_clear(MO_AUD_DMACNTRL, 0x11);
 178
 179         /* disable irqs */
 180         cx_clear(MO_PCI_INTMSK, PCI_INT_AUDINT);
 181         cx_clear(MO_AUD_INTMSK, AUD_INT_OPC_ERR | AUD_INT_DN_SYNC |
 182                                 AUD_INT_DN_RISCI2 | AUD_INT_DN_RISCI1);
 183
 184         if (debug)
 185                 cx88_sram_channel_dump(chip->core, &cx88_sram_channels[SRAM_CH25]);
 186
 187         return 0;
 188 }
 189
 190 #define MAX_IRQ_LOOP 50
 191
 192 /*
 193  * BOARD Specific: IRQ dma bits
 194  */
 195 static char *cx88_aud_irqs[32] = {
 196         "dn_risci1", "up_risci1", "rds_dn_risc1", /* 0-2 */
 197         NULL,                                     /* reserved */
 198         "dn_risci2", "up_risci2", "rds_dn_risc2", /* 4-6 */
 199         NULL,                                     /* reserved */
 200         "dnf_of", "upf_uf", "rds_dnf_uf",         /* 8-10 */
 201         NULL,                                     /* reserved */
 202         "dn_sync", "up_sync", "rds_dn_sync",      /* 12-14 */
 203         NULL,                                     /* reserved */
 204         "opc_err", "par_err", "rip_err",          /* 16-18 */
 205         "pci_abort", "ber_irq", "mchg_irq"        /* 19-21 */
 206 };
 207
 208 /*
 209  * BOARD Specific: Threats IRQ audio specific calls
 210  */
 211 static void cx8801_aud_irq(snd_cx88_card_t *chip)
 212 {
 213         struct cx88_core *core = chip->core;
 214         u32 status, mask;
 215
 216         status = cx_read(MO_AUD_INTSTAT);
 217         mask   = cx_read(MO_AUD_INTMSK);
 218         if (0 == (status & mask))
 219                 return;
 220         cx_write(MO_AUD_INTSTAT, status);
 221         if (debug > 1  ||  (status & mask & ~0xff))
 222                 cx88_print_irqbits(core->name, "irq aud",
 223                                    cx88_aud_irqs, ARRAY_SIZE(cx88_aud_irqs),
 224                                    status, mask);
 225         /* risc op code error */
 226         if (status & AUD_INT_OPC_ERR) {
 227                 printk(KERN_WARNING "%s/1: Audio risc op code error\n",core->name);
 228                 cx_clear(MO_AUD_DMACNTRL, 0x11);
 229                 cx88_sram_channel_dump(core, &cx88_sram_channels[SRAM_CH25]);
 230         }
 231         if (status & AUD_INT_DN_SYNC) {
 232                 dprintk(1, "Downstream sync error\n");
 233                 cx_write(MO_AUDD_GPCNTRL, GP_COUNT_CONTROL_RESET);
 234                 return;
 235         }
 236         /* risc1 downstream */
 237         if (status & AUD_INT_DN_RISCI1) {
 238                 atomic_set(&chip->count, cx_read(MO_AUDD_GPCNT));
 239                 snd_pcm_period_elapsed(chip->substream);
 240         }
 241         /* FIXME: Any other status should deserve a special handling? */
 242 }
 243
 244 /*
 245  * BOARD Specific: Handles IRQ calls
 246  */
 247 static irqreturn_t cx8801_irq(int irq, void *dev_id)
 248 {
 249         snd_cx88_card_t *chip = dev_id;
 250         struct cx88_core *core = chip->core;
 251         u32 status;
 252         int loop, handled = 0;
 253
 254         for (loop = 0; loop < MAX_IRQ_LOOP; loop++) {
 255                 status = cx_read(MO_PCI_INTSTAT) &
 256                         (core->pci_irqmask | PCI_INT_AUDINT);
 257                 if (0 == status)
 258                         goto out;
 259                 dprintk(3, "cx8801_irq loop %d/%d, status %x\n",
 260                         loop, MAX_IRQ_LOOP, status);
 261                 handled = 1;
 262                 cx_write(MO_PCI_INTSTAT, status);
 263
 264                 if (status & core->pci_irqmask)
 265                         cx88_core_irq(core, status);
 266                 if (status & PCI_INT_AUDINT)
 267                         cx8801_aud_irq(chip);
 268         }
 269
 270         if (MAX_IRQ_LOOP == loop) {
 271                 printk(KERN_ERR
 272                        "%s/1: IRQ loop detected, disabling interrupts\n",
 273                        core->name);
 274                 cx_clear(MO_PCI_INTMSK, PCI_INT_AUDINT);
 275         }
 276
 277  out:
 278         return IRQ_RETVAL(handled);
 279 }
 280
 281
 282 static int dsp_buffer_free(snd_cx88_card_t *chip)
 283 {
 284         BUG_ON(!chip->dma_size);
 285
 286         dprintk(2,"Freeing buffer\n");
 287         videobuf_pci_dma_unmap(chip->pci, chip->dma_risc);
 288         videobuf_dma_free(chip->dma_risc);
 289         btcx_riscmem_free(chip->pci,&chip->buf->risc);
 290         kfree(chip->buf);
 291
 292         chip->dma_risc = NULL;
 293         chip->dma_size = 0;
 294
 295         return 0;
 296 }
 297
 298 /****************************************************************************
 299                                 ALSA PCM Interface
 300  ****************************************************************************/
 301
 302 /*
 303  * Digital hardware definition
 304  */
 305 #define DEFAULT_FIFO_SIZE       4096
 306 static struct snd_pcm_hardware snd_cx88_digital_hw = {
 307         .info = SNDRV_PCM_INFO_MMAP |
 308                 SNDRV_PCM_INFO_INTERLEAVED |
 309                 SNDRV_PCM_INFO_BLOCK_TRANSFER |
 310                 SNDRV_PCM_INFO_MMAP_VALID,
 311         .formats = SNDRV_PCM_FMTBIT_S16_LE,
 312
 313         .rates =                SNDRV_PCM_RATE_48000,
 314         .rate_min =             48000,
 315         .rate_max =             48000,
 316         .channels_min = 2,
 317         .channels_max = 2,
 318         /* Analog audio output will be full of clicks and pops if there
 319            are not exactly four lines in the SRAM FIFO buffer.  */
 320         .period_bytes_min = DEFAULT_FIFO_SIZE/4,
 321         .period_bytes_max = DEFAULT_FIFO_SIZE/4,
 322         .periods_min = 1,
 323         .periods_max = 1024,
 324         .buffer_bytes_max = (1024*1024),
 325 };
 326
 327 /*
 328  * audio pcm capture open callback
 329  */
 330 static int snd_cx88_pcm_open(struct snd_pcm_substream *substream)
 331 {
 332         snd_cx88_card_t *chip = snd_pcm_substream_chip(substream);
 333         struct snd_pcm_runtime *runtime = substream->runtime;
 334         int err;
 335
 336         err = snd_pcm_hw_constraint_pow2(runtime, 0, SNDRV_PCM_HW_PARAM_PERIODS);
 337         if (err < 0)
 338                 goto _error;
 339
 340         chip->substream = substream;
 341
 342         runtime->hw = snd_cx88_digital_hw;
 343
 344         if (cx88_sram_channels[SRAM_CH25].fifo_size != DEFAULT_FIFO_SIZE) {
 345                 unsigned int bpl = cx88_sram_channels[SRAM_CH25].fifo_size / 4;
 346                 bpl &= ~7; /* must be multiple of 8 */
 347                 runtime->hw.period_bytes_min = bpl;
 348                 runtime->hw.period_bytes_max = bpl;
 349         }
 350
 351         return 0;
 352 _error:
 353         dprintk(1,"Error opening PCM!\n");
 354         return err;
 355 }
 356
 357 /*
 358  * audio close callback
 359  */
 360 static int snd_cx88_close(struct snd_pcm_substream *substream)
 361 {
 362         return 0;
 363 }
 364
 365 /*
 366  * hw_params callback
 367  */
 368 static int snd_cx88_hw_params(struct snd_pcm_substream * substream,
 369                               struct snd_pcm_hw_params * hw_params)
 370 {
 371         snd_cx88_card_t *chip = snd_pcm_substream_chip(substream);
 372         struct videobuf_dmabuf *dma;
 373
 374         struct cx88_buffer *buf;
 375         int ret;
 376
 377         if (substream->runtime->dma_area) {
 378                 dsp_buffer_free(chip);
 379                 substream->runtime->dma_area = NULL;
 380         }
 381
 382         chip->period_size = params_period_bytes(hw_params);
 383         chip->num_periods = params_periods(hw_params);
 384         chip->dma_size = chip->period_size * params_periods(hw_params);
 385
 386         BUG_ON(!chip->dma_size);
 387         BUG_ON(chip->num_periods & (chip->num_periods-1));
 388
 389         buf = videobuf_pci_alloc(sizeof(*buf));
 390         if (NULL == buf)
 391                 return -ENOMEM;
 392
 393         buf->vb.memory = V4L2_MEMORY_MMAP;
 394         buf->vb.field  = V4L2_FIELD_NONE;
 395         buf->vb.width  = chip->period_size;
 396         buf->bpl       = chip->period_size;
 397         buf->vb.height = chip->num_periods;
 398         buf->vb.size   = chip->dma_size;
 399
 400         dma=videobuf_to_dma(&buf->vb);
 401         videobuf_dma_init(dma);
 402         ret = videobuf_dma_init_kernel(dma, PCI_DMA_FROMDEVICE,
 403                         (PAGE_ALIGN(buf->vb.size) >> PAGE_SHIFT));
 404         if (ret < 0)
 405                 goto error;
 406
 407         ret = videobuf_pci_dma_map(chip->pci,dma);
 408         if (ret < 0)
 409                 goto error;
 410
 411         ret = cx88_risc_databuffer(chip->pci, &buf->risc, dma->sglist,
 412                                    buf->vb.width, buf->vb.height, 1);
 413         if (ret < 0)
 414                 goto error;
 415
 416         /* Loop back to start of program */
 417         buf->risc.jmp[0] = cpu_to_le32(RISC_JUMP|RISC_IRQ1|RISC_CNT_INC);
 418         buf->risc.jmp[1] = cpu_to_le32(buf->risc.dma);
 419
 420         buf->vb.state = STATE_PREPARED;
 421
 422         chip->buf = buf;
 423         chip->dma_risc = dma;
 424
 425         substream->runtime->dma_area = chip->dma_risc->vmalloc;
 426         substream->runtime->dma_bytes = chip->dma_size;
 427         substream->runtime->dma_addr = 0;
 428         return 0;
 429
 430 error:
 431         kfree(buf);
 432         return ret;
 433 }
 434
 435 /*
 436  * hw free callback
 437  */
 438 static int snd_cx88_hw_free(struct snd_pcm_substream * substream)
 439 {
 440
 441         snd_cx88_card_t *chip = snd_pcm_substream_chip(substream);
 442
 443         if (substream->runtime->dma_area) {
 444                 dsp_buffer_free(chip);
 445                 substream->runtime->dma_area = NULL;
 446         }
 447
 448         return 0;
 449 }
 450
 451 /*
 452  * prepare callback
 453  */
 454 static int snd_cx88_prepare(struct snd_pcm_substream *substream)
 455 {
 456         return 0;
 457 }
 458
 459 /*
 460  * trigger callback
 461  */
 462 static int snd_cx88_card_trigger(struct snd_pcm_substream *substream, int cmd)
 463 {
 464         snd_cx88_card_t *chip = snd_pcm_substream_chip(substream);
 465         int err;
 466
 467         /* Local interrupts are already disabled by ALSA */
 468         spin_lock(&chip->reg_lock);
 469
 470         switch (cmd) {
 471         case SNDRV_PCM_TRIGGER_START:
 472                 err=_cx88_start_audio_dma(chip);
 473                 break;
 474         case SNDRV_PCM_TRIGGER_STOP:
 475                 err=_cx88_stop_audio_dma(chip);
 476                 break;
 477         default:
 478                 err=-EINVAL;
 479                 break;
 480         }
 481
 482         spin_unlock(&chip->reg_lock);
 483
 484         return err;
 485 }
 486
 487 /*
 488  * pointer callback
 489  */
 490 static snd_pcm_uframes_t snd_cx88_pointer(struct snd_pcm_substream *substream)
 491 {
 492         snd_cx88_card_t *chip = snd_pcm_substream_chip(substream);
 493         struct snd_pcm_runtime *runtime = substream->runtime;
 494         u16 count;
 495
 496         count = atomic_read(&chip->count);
 497
 498 //      dprintk(2, "%s - count %d (+%u), period %d, frame %lu\n", __FUNCTION__,
 499 //              count, new, count & (runtime->periods-1),
 500 //              runtime->period_size * (count & (runtime->periods-1)));
 501         return runtime->period_size * (count & (runtime->periods-1));
 502 }
 503
 504 /*
 505  * page callback (needed for mmap)
 506  */
 507 static struct page *snd_cx88_page(struct snd_pcm_substream *substream,
 508                                 unsigned long offset)
 509 {
 510         void *pageptr = substream->runtime->dma_area + offset;
 511         return vmalloc_to_page(pageptr);
 512 }
 513
 514 /*
 515  * operators
 516  */
 517 static struct snd_pcm_ops snd_cx88_pcm_ops = {
 518         .open = snd_cx88_pcm_open,
 519         .close = snd_cx88_close,
 520         .ioctl = snd_pcm_lib_ioctl,
 521         .hw_params = snd_cx88_hw_params,
 522         .hw_free = snd_cx88_hw_free,
 523         .prepare = snd_cx88_prepare,
 524         .trigger = snd_cx88_card_trigger,
 525         .pointer = snd_cx88_pointer,
 526         .page = snd_cx88_page,
 527 };
 528
 529 /*
 530  * create a PCM device
 531  */
 532 static int __devinit snd_cx88_pcm(snd_cx88_card_t *chip, int device, char *name)
 533 {
 534         int err;
 535         struct snd_pcm *pcm;
 536
 537         err = snd_pcm_new(chip->card, name, device, 0, 1, &pcm);
 538         if (err < 0)
 539                 return err;
 540         pcm->private_data = chip;
 541         strcpy(pcm->name, name);
 542         snd_pcm_set_ops(pcm, SNDRV_PCM_STREAM_CAPTURE, &snd_cx88_pcm_ops);
 543
 544         return 0;
 545 }
 546
 547 /****************************************************************************
 548                                 CONTROL INTERFACE
 549  ****************************************************************************/
 550 static int snd_cx88_volume_info(struct snd_kcontrol *kcontrol,
 551                                 struct snd_ctl_elem_info *info)
 552 {
 553         info->type = SNDRV_CTL_ELEM_TYPE_INTEGER;
 554         info->count = 2;
 555         info->value.integer.min = 0;
 556         info->value.integer.max = 0x3f;
 557
 558         return 0;
 559 }
 560
 561 static int snd_cx88_volume_get(struct snd_kcontrol *kcontrol,
 562                                struct snd_ctl_elem_value *value)
 563 {
 564         snd_cx88_card_t *chip = snd_kcontrol_chip(kcontrol);
 565         struct cx88_core *core=chip->core;
 566         int vol = 0x3f - (cx_read(AUD_VOL_CTL) & 0x3f),
 567             bal = cx_read(AUD_BAL_CTL);
 568
 569         value->value.integer.value[(bal & 0x40) ? 0 : 1] = vol;
 570         vol -= (bal & 0x3f);
 571         value->value.integer.value[(bal & 0x40) ? 1 : 0] = vol < 0 ? 0 : vol;
 572
 573         return 0;
 574 }
 575
 576 /* OK - TODO: test it */
 577 static int snd_cx88_volume_put(struct snd_kcontrol *kcontrol,
 578                                struct snd_ctl_elem_value *value)
 579 {
 580         snd_cx88_card_t *chip = snd_kcontrol_chip(kcontrol);
 581         struct cx88_core *core=chip->core;
 582         int v, b;
 583         int changed = 0;
 584         u32 old;
 585
 586         b = value->value.integer.value[1] - value->value.integer.value[0];
 587         if (b < 0) {
 588             v = 0x3f - value->value.integer.value[0];
 589             b = (-b) | 0x40;
 590         } else {
 591             v = 0x3f - value->value.integer.value[1];
 592         }
 593         /* Do we really know this will always be called with IRQs on? */
 594         spin_lock_irq(&chip->reg_lock);
 595         old = cx_read(AUD_VOL_CTL);
 596         if (v != (old & 0x3f)) {
 597             cx_write(AUD_VOL_CTL, (old & ~0x3f) | v);
 598             changed = 1;
 599         }
 600         if (cx_read(AUD_BAL_CTL) != b) {
 601             cx_write(AUD_BAL_CTL, b);
 602             changed = 1;
 603         }
 604         spin_unlock_irq(&chip->reg_lock);
 605
 606         return changed;
 607 }
 608
 609 static const DECLARE_TLV_DB_SCALE(snd_cx88_db_scale, -6300, 100, 0);
 610
 611 static struct snd_kcontrol_new snd_cx88_volume = {
 612         .iface = SNDRV_CTL_ELEM_IFACE_MIXER,
 613         .access = SNDRV_CTL_ELEM_ACCESS_READWRITE |
 614                   SNDRV_CTL_ELEM_ACCESS_TLV_READ,
 615         .name = "Playback Volume",
 616         .info = snd_cx88_volume_info,
 617         .get = snd_cx88_volume_get,
 618         .put = snd_cx88_volume_put,
 619         .tlv.p = snd_cx88_db_scale,
 620 };
 621
 622 static int snd_cx88_switch_get(struct snd_kcontrol *kcontrol,
 623                                struct snd_ctl_elem_value *value)
 624 {
 625         snd_cx88_card_t *chip = snd_kcontrol_chip(kcontrol);
 626         struct cx88_core *core = chip->core;
 627         u32 bit = kcontrol->private_value;
 628
 629         value->value.integer.value[0] = !(cx_read(AUD_VOL_CTL) & bit);
 630         return 0;
 631 }
 632
 633 static int snd_cx88_switch_put(struct snd_kcontrol *kcontrol,
 634                                        struct snd_ctl_elem_value *value)
 635 {
 636         snd_cx88_card_t *chip = snd_kcontrol_chip(kcontrol);
 637         struct cx88_core *core = chip->core;
 638         u32 bit = kcontrol->private_value;
 639         int ret = 0;
 640         u32 vol;
 641
 642         spin_lock_irq(&chip->reg_lock);
 643         vol = cx_read(AUD_VOL_CTL);
 644         if (value->value.integer.value[0] != !(vol & bit)) {
 645                 vol ^= bit;
 646                 cx_write(AUD_VOL_CTL, vol);
 647                 ret = 1;
 648         }
 649         spin_unlock_irq(&chip->reg_lock);
 650         return ret;
 651 }
 652
 653 static struct snd_kcontrol_new snd_cx88_dac_switch = {
 654         .iface = SNDRV_CTL_ELEM_IFACE_MIXER,
 655         .name = "Playback Switch",
 656         .info = snd_ctl_boolean_mono_info,
 657         .get = snd_cx88_switch_get,
 658         .put = snd_cx88_switch_put,
 659         .private_value = (1<<8),
 660 };
 661
 662 static struct snd_kcontrol_new snd_cx88_source_switch = {
 663         .iface = SNDRV_CTL_ELEM_IFACE_MIXER,
 664         .name = "Capture Switch",
 665         .info = snd_ctl_boolean_mono_info,
 666         .get = snd_cx88_switch_get,
 667         .put = snd_cx88_switch_put,
 668         .private_value = (1<<6),
 669 };
 670
 671 /****************************************************************************
 672                         Basic Flow for Sound Devices
 673  ****************************************************************************/
 674
 675 /*
 676  * PCI ID Table - 14f1:8801 and 14f1:8811 means function 1: Audio
 677  * Only boards with eeprom and byte 1 at eeprom=1 have it
 678  */
 679
 680 static struct pci_device_id cx88_audio_pci_tbl[] __devinitdata = {
 681         {0x14f1,0x8801,PCI_ANY_ID,PCI_ANY_ID,0,0,0},
 682         {0x14f1,0x8811,PCI_ANY_ID,PCI_ANY_ID,0,0,0},
 683         {0, }
 684 };
 685 MODULE_DEVICE_TABLE(pci, cx88_audio_pci_tbl);
 686
 687 /*
 688  * Chip-specific destructor
 689  */
 690
 691 static int snd_cx88_free(snd_cx88_card_t *chip)
 692 {
 693
 694         if (chip->irq >= 0){
 695                 synchronize_irq(chip->irq);
 696                 free_irq(chip->irq, chip);
 697         }
 698
 699         cx88_core_put(chip->core,chip->pci);
 700
 701         pci_disable_device(chip->pci);
 702         return 0;
 703 }
 704
 705 /*
 706  * Component Destructor
 707  */
 708 static void snd_cx88_dev_free(struct snd_card * card)
 709 {
 710         snd_cx88_card_t *chip = card->private_data;
 711
 712         snd_cx88_free(chip);
 713 }
 714
 715
 716 /*
 717  * Alsa Constructor - Component probe
 718  */
 719
 720 static int devno;
 721 static int __devinit snd_cx88_create(struct snd_card *card,
 722                                      struct pci_dev *pci,
 723                                      snd_cx88_card_t **rchip)
 724 {
 725         snd_cx88_card_t   *chip;
 726         struct cx88_core  *core;
 727         int               err;
 728         unsigned char     pci_lat;
 729
 730         *rchip = NULL;
 731
 732         err = pci_enable_device(pci);
 733         if (err < 0)
 734                 return err;
 735
 736         pci_set_master(pci);
 737
 738         chip = (snd_cx88_card_t *) card->private_data;
 739
 740         core = cx88_core_get(pci);
 741         if (NULL == core) {
 742                 err = -EINVAL;
 743                 kfree (chip);
 744                 return err;
 745         }
 746
 747         if (!pci_dma_supported(pci,DMA_32BIT_MASK)) {
 748                 dprintk(0, "%s/1: Oops: no 32bit PCI DMA ???\n",core->name);
 749                 err = -EIO;
 750                 cx88_core_put(core,pci);
 751                 return err;
 752         }
 753
 754
 755         /* pci init */
 756         chip->card = card;
 757         chip->pci = pci;
 758         chip->irq = -1;
 759         spin_lock_init(&chip->reg_lock);
 760
 761         chip->core = core;
 762
 763         /* get irq */
 764         err = request_irq(chip->pci->irq, cx8801_irq,
 765                           IRQF_SHARED | IRQF_DISABLED, chip->core->name, chip);
 766         if (err < 0) {
 767                 dprintk(0, "%s: can't get IRQ %d\n",
 768                        chip->core->name, chip->pci->irq);
 769                 return err;
 770         }
 771
 772         /* print pci info */
 773         pci_read_config_byte(pci, PCI_LATENCY_TIMER, &pci_lat);
 774
 775         dprintk(1,"ALSA %s/%i: found at %s, rev: %d, irq: %d, "
 776                "latency: %d, mmio: 0x%llx\n", core->name, devno,
 777                pci_name(pci), pci->revision, pci->irq,
 778                pci_lat, (unsigned long long)pci_resource_start(pci,0));
 779
 780         chip->irq = pci->irq;
 781         synchronize_irq(chip->irq);
 782
 783         snd_card_set_dev(card, &pci->dev);
 784
 785         *rchip = chip;
 786
 787         return 0;
 788 }
 789
 790 static int __devinit cx88_audio_initdev(struct pci_dev *pci,
 791                                     const struct pci_device_id *pci_id)
 792 {
 793         struct snd_card  *card;
 794         snd_cx88_card_t  *chip;
 795         int              err;
 796
 797         if (devno >= SNDRV_CARDS)
 798                 return (-ENODEV);
 799
 800         if (!enable[devno]) {
 801                 ++devno;
 802                 return (-ENOENT);
 803         }
 804
 805         card = snd_card_new(index[devno], id[devno], THIS_MODULE, sizeof(snd_cx88_card_t));
 806         if (!card)
 807                 return (-ENOMEM);
 808
 809         card->private_free = snd_cx88_dev_free;
 810
 811         err = snd_cx88_create(card, pci, &chip);
 812         if (err < 0)
 813                 return (err);
 814
 815         err = snd_cx88_pcm(chip, 0, "CX88 Digital");
 816         if (err < 0)
 817                 goto error;
 818
 819         err = snd_ctl_add(card, snd_ctl_new1(&snd_cx88_volume, chip));
 820         if (err < 0)
 821                 goto error;
 822         err = snd_ctl_add(card, snd_ctl_new1(&snd_cx88_dac_switch, chip));
 823         if (err < 0)
 824                 goto error;
 825         err = snd_ctl_add(card, snd_ctl_new1(&snd_cx88_source_switch, chip));
 826         if (err < 0)
 827                 goto error;
 828
 829         strcpy (card->driver, "CX88x");
 830         sprintf(card->shortname, "Conexant CX%x", pci->device);
 831         sprintf(card->longname, "%s at %#llx",
 832                 card->shortname,(unsigned long long)pci_resource_start(pci, 0));
 833         strcpy (card->mixername, "CX88");
 834
 835         dprintk (0, "%s/%i: ALSA support for cx2388x boards\n",
 836                card->driver,devno);
 837
 838         err = snd_card_register(card);
 839         if (err < 0)
 840                 goto error;
 841         pci_set_drvdata(pci,card);
 842
 843         devno++;
 844         return 0;
 845
 846 error:
 847         snd_card_free(card);
 848         return err;
 849 }
 850 /*
 851  * ALSA destructor
 852  */
 853 static void __devexit cx88_audio_finidev(struct pci_dev *pci)
 854 {
 855         struct cx88_audio_dev *card = pci_get_drvdata(pci);
 856
 857         snd_card_free((void *)card);
 858
 859         pci_set_drvdata(pci, NULL);
 860
 861         devno--;
 862 }
 863
 864 /*
 865  * PCI driver definition
 866  */
 867
 868 static struct pci_driver cx88_audio_pci_driver = {
 869         .name     = "cx88_audio",
 870         .id_table = cx88_audio_pci_tbl,
 871         .probe    = cx88_audio_initdev,
 872         .remove   = cx88_audio_finidev,
 873 };
 874
 875 /****************************************************************************
 876                                 LINUX MODULE INIT
 877  ****************************************************************************/
 878
 879 /*
 880  * module init
 881  */
 882 static int cx88_audio_init(void)
 883 {
 884         printk(KERN_INFO "cx2388x alsa driver version %d.%d.%d loaded\n",
 885                (CX88_VERSION_CODE >> 16) & 0xff,
 886                (CX88_VERSION_CODE >>  8) & 0xff,
 887                CX88_VERSION_CODE & 0xff);
 888 #ifdef SNAPSHOT
 889         printk(KERN_INFO "cx2388x: snapshot date %04d-%02d-%02d\n",
 890                SNAPSHOT/10000, (SNAPSHOT/100)%100, SNAPSHOT%100);
 891 #endif
 892         return pci_register_driver(&cx88_audio_pci_driver);
 893 }
 894
 895 /*
 896  * module remove
 897  */
 898 static void cx88_audio_fini(void)
 899 {
 900
 901         pci_unregister_driver(&cx88_audio_pci_driver);
 902 }
 903
 904 module_init(cx88_audio_init);
 905 module_exit(cx88_audio_fini);
 906
 907 /* ----------------------------------------------------------- */
 908 /*
 909  * Local variables:
 910  * c-basic-offset: 8
 911  * End:
 912  */