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/core.h>
  37 #include <sound/pcm.h>
  38 #include <sound/pcm_params.h>
  39 #include <sound/control.h>
  40 #include <sound/initval.h>
  41 #include <sound/tlv.h>
  42
  43 #include "cx88.h"
  44 #include "cx88-reg.h"
  45
  46 #define dprintk(level,fmt, arg...)      if (debug >= level) \
  47         printk(KERN_INFO "%s/1: " fmt, chip->core->name , ## arg)
  48
  49 #define dprintk_core(level,fmt, arg...) if (debug >= level) \
  50         printk(KERN_DEBUG "%s/1: " fmt, chip->core->name , ## arg)
  51
  52 /****************************************************************************
  53         Data type declarations - Can be moded to a header file later
  54  ****************************************************************************/
  55
  56 struct cx88_audio_dev {
  57         struct cx88_core           *core;
  58         struct cx88_dmaqueue       q;
  59
  60         /* pci i/o */
  61         struct pci_dev             *pci;
  62
  63         /* audio controls */
  64         int                        irq;
  65
  66         struct snd_card            *card;
  67
  68         spinlock_t                 reg_lock;
  69         atomic_t                   count;
  70
  71         unsigned int               dma_size;
  72         unsigned int               period_size;
  73         unsigned int               num_periods;
  74
  75         struct videobuf_dmabuf     *dma_risc;
  76
  77         struct cx88_buffer         *buf;
  78
  79         struct snd_pcm_substream   *substream;
  80 };
  81 typedef struct cx88_audio_dev snd_cx88_card_t;
  82
  83
  84
  85
  86 /****************************************************************************
  87                         Module global static vars
  88  ****************************************************************************/
  89
  90 static int index[SNDRV_CARDS] = SNDRV_DEFAULT_IDX;      /* Index 0-MAX */
  91 static char *id[SNDRV_CARDS] = SNDRV_DEFAULT_STR;       /* ID for this card */
  92 static int enable[SNDRV_CARDS] = {1, [1 ... (SNDRV_CARDS - 1)] = 1};
  93
  94 module_param_array(enable, bool, NULL, 0444);
  95 MODULE_PARM_DESC(enable, "Enable cx88x soundcard. default enabled.");
  96
  97 module_param_array(index, int, NULL, 0444);
  98 MODULE_PARM_DESC(index, "Index value for cx88x capture interface(s).");
  99
 100
 101 /****************************************************************************
 102                                 Module macros
 103  ****************************************************************************/
 104
 105 MODULE_DESCRIPTION("ALSA driver module for cx2388x based TV cards");
 106 MODULE_AUTHOR("Ricardo Cerqueira");
 107 MODULE_AUTHOR("Mauro Carvalho Chehab <mchehab@infradead.org>");
 108 MODULE_LICENSE("GPL");
 109 MODULE_SUPPORTED_DEVICE("{{Conexant,23881},"
 110                         "{{Conexant,23882},"
 111                         "{{Conexant,23883}");
 112 static unsigned int debug;
 113 module_param(debug,int,0644);
 114 MODULE_PARM_DESC(debug,"enable debug messages");
 115
 116 /****************************************************************************
 117                         Module specific funtions
 118  ****************************************************************************/
 119
 120 /*
 121  * BOARD Specific: Sets audio DMA
 122  */
 123
 124 static int _cx88_start_audio_dma(snd_cx88_card_t *chip)
 125 {
 126         struct cx88_buffer   *buf = chip->buf;
 127         struct cx88_core *core=chip->core;
 128         struct sram_channel *audio_ch = &cx88_sram_channels[SRAM_CH25];
 129
 130         /* Make sure RISC/FIFO are off before changing FIFO/RISC settings */
 131         cx_clear(MO_AUD_DMACNTRL, 0x11);
 132
 133         /* setup fifo + format - out channel */
 134         cx88_sram_channel_setup(chip->core, audio_ch, buf->bpl, buf->risc.dma);
 135
 136         /* sets bpl size */
 137         cx_write(MO_AUDD_LNGTH, buf->bpl);
 138
 139         /* reset counter */
 140         cx_write(MO_AUDD_GPCNTRL, GP_COUNT_CONTROL_RESET);
 141         atomic_set(&chip->count, 0);
 142
 143         dprintk(1, "Start audio DMA, %d B/line, %d lines/FIFO, %d periods, %d "
 144                 "byte buffer\n", buf->bpl, cx_read(audio_ch->cmds_start + 8)>>1,
 145                 chip->num_periods, buf->bpl * chip->num_periods);
 146
 147         /* Enables corresponding bits at AUD_INT_STAT */
 148         cx_write(MO_AUD_INTMSK, AUD_INT_OPC_ERR | AUD_INT_DN_SYNC |
 149                                 AUD_INT_DN_RISCI2 | AUD_INT_DN_RISCI1);
 150
 151         /* Clean any pending interrupt bits already set */
 152         cx_write(MO_AUD_INTSTAT, ~0);
 153
 154         /* enable audio irqs */
 155         cx_set(MO_PCI_INTMSK, chip->core->pci_irqmask | PCI_INT_AUDINT);
 156
 157         /* start dma */
 158         cx_set(MO_DEV_CNTRL2, (1<<5)); /* Enables Risc Processor */
 159         cx_set(MO_AUD_DMACNTRL, 0x11); /* audio downstream FIFO and RISC enable */
 160
 161         if (debug)
 162                 cx88_sram_channel_dump(chip->core, audio_ch);
 163
 164         return 0;
 165 }
 166
 167 /*
 168  * BOARD Specific: Resets audio DMA
 169  */
 170 static int _cx88_stop_audio_dma(snd_cx88_card_t *chip)
 171 {
 172         struct cx88_core *core=chip->core;
 173         dprintk(1, "Stopping audio DMA\n");
 174
 175         /* stop dma */
 176         cx_clear(MO_AUD_DMACNTRL, 0x11);
 177
 178         /* disable irqs */
 179         cx_clear(MO_PCI_INTMSK, PCI_INT_AUDINT);
 180         cx_clear(MO_AUD_INTMSK, AUD_INT_OPC_ERR | AUD_INT_DN_SYNC |
 181                                 AUD_INT_DN_RISCI2 | AUD_INT_DN_RISCI1);
 182
 183         if (debug)
 184                 cx88_sram_channel_dump(chip->core, &cx88_sram_channels[SRAM_CH25]);
 185
 186         return 0;
 187 }
 188
 189 #define MAX_IRQ_LOOP 50
 190
 191 /*
 192  * BOARD Specific: IRQ dma bits
 193  */
 194 static char *cx88_aud_irqs[32] = {
 195         "dn_risci1", "up_risci1", "rds_dn_risc1", /* 0-2 */
 196         NULL,                                     /* reserved */
 197         "dn_risci2", "up_risci2", "rds_dn_risc2", /* 4-6 */
 198         NULL,                                     /* reserved */
 199         "dnf_of", "upf_uf", "rds_dnf_uf",         /* 8-10 */
 200         NULL,                                     /* reserved */
 201         "dn_sync", "up_sync", "rds_dn_sync",      /* 12-14 */
 202         NULL,                                     /* reserved */
 203         "opc_err", "par_err", "rip_err",          /* 16-18 */
 204         "pci_abort", "ber_irq", "mchg_irq"        /* 19-21 */
 205 };
 206
 207 /*
 208  * BOARD Specific: Threats IRQ audio specific calls
 209  */
 210 static void cx8801_aud_irq(snd_cx88_card_t *chip)
 211 {
 212         struct cx88_core *core = chip->core;
 213         u32 status, mask;
 214
 215         status = cx_read(MO_AUD_INTSTAT);
 216         mask   = cx_read(MO_AUD_INTMSK);
 217         if (0 == (status & mask))
 218                 return;
 219         cx_write(MO_AUD_INTSTAT, status);
 220         if (debug > 1  ||  (status & mask & ~0xff))
 221                 cx88_print_irqbits(core->name, "irq aud",
 222                                    cx88_aud_irqs, ARRAY_SIZE(cx88_aud_irqs),
 223                                    status, mask);
 224         /* risc op code error */
 225         if (status & AUD_INT_OPC_ERR) {
 226                 printk(KERN_WARNING "%s/1: Audio risc op code error\n",core->name);
 227                 cx_clear(MO_AUD_DMACNTRL, 0x11);
 228                 cx88_sram_channel_dump(core, &cx88_sram_channels[SRAM_CH25]);
 229         }
 230         if (status & AUD_INT_DN_SYNC) {
 231                 dprintk(1, "Downstream sync error\n");
 232                 cx_write(MO_AUDD_GPCNTRL, GP_COUNT_CONTROL_RESET);
 233                 return;
 234         }
 235         /* risc1 downstream */
 236         if (status & AUD_INT_DN_RISCI1) {
 237                 atomic_set(&chip->count, cx_read(MO_AUDD_GPCNT));
 238                 snd_pcm_period_elapsed(chip->substream);
 239         }
 240         /* FIXME: Any other status should deserve a special handling? */
 241 }
 242
 243 /*
 244  * BOARD Specific: Handles IRQ calls
 245  */
 246 static irqreturn_t cx8801_irq(int irq, void *dev_id)
 247 {
 248         snd_cx88_card_t *chip = dev_id;
 249         struct cx88_core *core = chip->core;
 250         u32 status;
 251         int loop, handled = 0;
 252
 253         for (loop = 0; loop < MAX_IRQ_LOOP; loop++) {
 254                 status = cx_read(MO_PCI_INTSTAT) &
 255                         (core->pci_irqmask | PCI_INT_AUDINT);
 256                 if (0 == status)
 257                         goto out;
 258                 dprintk(3, "cx8801_irq loop %d/%d, status %x\n",
 259                         loop, MAX_IRQ_LOOP, status);
 260                 handled = 1;
 261                 cx_write(MO_PCI_INTSTAT, status);
 262
 263                 if (status & core->pci_irqmask)
 264                         cx88_core_irq(core, status);
 265                 if (status & PCI_INT_AUDINT)
 266                         cx8801_aud_irq(chip);
 267         }
 268
 269         if (MAX_IRQ_LOOP == loop) {
 270                 printk(KERN_ERR
 271                        "%s/1: IRQ loop detected, disabling interrupts\n",
 272                        core->name);
 273                 cx_clear(MO_PCI_INTMSK, PCI_INT_AUDINT);
 274         }
 275
 276  out:
 277         return IRQ_RETVAL(handled);
 278 }
 279
 280
 281 static int dsp_buffer_free(snd_cx88_card_t *chip)
 282 {
 283         BUG_ON(!chip->dma_size);
 284
 285         dprintk(2,"Freeing buffer\n");
 286         videobuf_sg_dma_unmap(&chip->pci->dev, chip->dma_risc);
 287         videobuf_dma_free(chip->dma_risc);
 288         btcx_riscmem_free(chip->pci,&chip->buf->risc);
 289         kfree(chip->buf);
 290
 291         chip->dma_risc = NULL;
 292         chip->dma_size = 0;
 293
 294         return 0;
 295 }
 296
 297 /****************************************************************************
 298                                 ALSA PCM Interface
 299  ****************************************************************************/
 300
 301 /*
 302  * Digital hardware definition
 303  */
 304 #define DEFAULT_FIFO_SIZE       4096
 305 static struct snd_pcm_hardware snd_cx88_digital_hw = {
 306         .info = SNDRV_PCM_INFO_MMAP |
 307                 SNDRV_PCM_INFO_INTERLEAVED |
 308                 SNDRV_PCM_INFO_BLOCK_TRANSFER |
 309                 SNDRV_PCM_INFO_MMAP_VALID,
 310         .formats = SNDRV_PCM_FMTBIT_S16_LE,
 311
 312         .rates =                SNDRV_PCM_RATE_48000,
 313         .rate_min =             48000,
 314         .rate_max =             48000,
 315         .channels_min = 2,
 316         .channels_max = 2,
 317         /* Analog audio output will be full of clicks and pops if there
 318            are not exactly four lines in the SRAM FIFO buffer.  */
 319         .period_bytes_min = DEFAULT_FIFO_SIZE/4,
 320         .period_bytes_max = DEFAULT_FIFO_SIZE/4,
 321         .periods_min = 1,
 322         .periods_max = 1024,
 323         .buffer_bytes_max = (1024*1024),
 324 };
 325
 326 /*
 327  * audio pcm capture open callback
 328  */
 329 static int snd_cx88_pcm_open(struct snd_pcm_substream *substream)
 330 {
 331         snd_cx88_card_t *chip = snd_pcm_substream_chip(substream);
 332         struct snd_pcm_runtime *runtime = substream->runtime;
 333         int err;
 334
 335         err = snd_pcm_hw_constraint_pow2(runtime, 0, SNDRV_PCM_HW_PARAM_PERIODS);
 336         if (err < 0)
 337                 goto _error;
 338
 339         chip->substream = substream;
 340
 341         runtime->hw = snd_cx88_digital_hw;
 342
 343         if (cx88_sram_channels[SRAM_CH25].fifo_size != DEFAULT_FIFO_SIZE) {
 344                 unsigned int bpl = cx88_sram_channels[SRAM_CH25].fifo_size / 4;
 345                 bpl &= ~7; /* must be multiple of 8 */
 346                 runtime->hw.period_bytes_min = bpl;
 347                 runtime->hw.period_bytes_max = bpl;
 348         }
 349
 350         return 0;
 351 _error:
 352         dprintk(1,"Error opening PCM!\n");
 353         return err;
 354 }
 355
 356 /*
 357  * audio close callback
 358  */
 359 static int snd_cx88_close(struct snd_pcm_substream *substream)
 360 {
 361         return 0;
 362 }
 363
 364 /*
 365  * hw_params callback
 366  */
 367 static int snd_cx88_hw_params(struct snd_pcm_substream * substream,
 368                               struct snd_pcm_hw_params * hw_params)
 369 {
 370         snd_cx88_card_t *chip = snd_pcm_substream_chip(substream);
 371         struct videobuf_dmabuf *dma;
 372
 373         struct cx88_buffer *buf;
 374         int ret;
 375
 376         if (substream->runtime->dma_area) {
 377                 dsp_buffer_free(chip);
 378                 substream->runtime->dma_area = NULL;
 379         }
 380
 381         chip->period_size = params_period_bytes(hw_params);
 382         chip->num_periods = params_periods(hw_params);
 383         chip->dma_size = chip->period_size * params_periods(hw_params);
 384
 385         BUG_ON(!chip->dma_size);
 386         BUG_ON(chip->num_periods & (chip->num_periods-1));
 387
 388         buf = videobuf_sg_alloc(sizeof(*buf));
 389         if (NULL == buf)
 390                 return -ENOMEM;
 391
 392         buf->vb.memory = V4L2_MEMORY_MMAP;
 393         buf->vb.field  = V4L2_FIELD_NONE;
 394         buf->vb.width  = chip->period_size;
 395         buf->bpl       = chip->period_size;
 396         buf->vb.height = chip->num_periods;
 397         buf->vb.size   = chip->dma_size;
 398
 399         dma = videobuf_to_dma(&buf->vb);
 400         videobuf_dma_init(dma);
 401         ret = videobuf_dma_init_kernel(dma, PCI_DMA_FROMDEVICE,
 402                         (PAGE_ALIGN(buf->vb.size) >> PAGE_SHIFT));
 403         if (ret < 0)
 404                 goto error;
 405
 406         ret = videobuf_sg_dma_map(&chip->pci->dev, dma);
 407         if (ret < 0)
 408                 goto error;
 409
 410         ret = cx88_risc_databuffer(chip->pci, &buf->risc, dma->sglist,
 411                                    buf->vb.width, buf->vb.height, 1);
 412         if (ret < 0)
 413                 goto error;
 414
 415         /* Loop back to start of program */
 416         buf->risc.jmp[0] = cpu_to_le32(RISC_JUMP|RISC_IRQ1|RISC_CNT_INC);
 417         buf->risc.jmp[1] = cpu_to_le32(buf->risc.dma);
 418
 419         buf->vb.state = VIDEOBUF_PREPARED;
 420
 421         chip->buf = buf;
 422         chip->dma_risc = dma;
 423
 424         substream->runtime->dma_area = chip->dma_risc->vmalloc;
 425         substream->runtime->dma_bytes = chip->dma_size;
 426         substream->runtime->dma_addr = 0;
 427         return 0;
 428
 429 error:
 430         kfree(buf);
 431         return ret;
 432 }
 433
 434 /*
 435  * hw free callback
 436  */
 437 static int snd_cx88_hw_free(struct snd_pcm_substream * substream)
 438 {
 439
 440         snd_cx88_card_t *chip = snd_pcm_substream_chip(substream);
 441
 442         if (substream->runtime->dma_area) {
 443                 dsp_buffer_free(chip);
 444                 substream->runtime->dma_area = NULL;
 445         }
 446
 447         return 0;
 448 }
 449
 450 /*
 451  * prepare callback
 452  */
 453 static int snd_cx88_prepare(struct snd_pcm_substream *substream)
 454 {
 455         return 0;
 456 }
 457
 458 /*
 459  * trigger callback
 460  */
 461 static int snd_cx88_card_trigger(struct snd_pcm_substream *substream, int cmd)
 462 {
 463         snd_cx88_card_t *chip = snd_pcm_substream_chip(substream);
 464         int err;
 465
 466         /* Local interrupts are already disabled by ALSA */
 467         spin_lock(&chip->reg_lock);
 468
 469         switch (cmd) {
 470         case SNDRV_PCM_TRIGGER_START:
 471                 err=_cx88_start_audio_dma(chip);
 472                 break;
 473         case SNDRV_PCM_TRIGGER_STOP:
 474                 err=_cx88_stop_audio_dma(chip);
 475                 break;
 476         default:
 477                 err=-EINVAL;
 478                 break;
 479         }
 480
 481         spin_unlock(&chip->reg_lock);
 482
 483         return err;
 484 }
 485
 486 /*
 487  * pointer callback
 488  */
 489 static snd_pcm_uframes_t snd_cx88_pointer(struct snd_pcm_substream *substream)
 490 {
 491         snd_cx88_card_t *chip = snd_pcm_substream_chip(substream);
 492         struct snd_pcm_runtime *runtime = substream->runtime;
 493         u16 count;
 494
 495         count = atomic_read(&chip->count);
 496
 497 //      dprintk(2, "%s - count %d (+%u), period %d, frame %lu\n", __func__,
 498 //              count, new, count & (runtime->periods-1),
 499 //              runtime->period_size * (count & (runtime->periods-1)));
 500         return runtime->period_size * (count & (runtime->periods-1));
 501 }
 502
 503 /*
 504  * page callback (needed for mmap)
 505  */
 506 static struct page *snd_cx88_page(struct snd_pcm_substream *substream,
 507                                 unsigned long offset)
 508 {
 509         void *pageptr = substream->runtime->dma_area + offset;
 510         return vmalloc_to_page(pageptr);
 511 }
 512
 513 /*
 514  * operators
 515  */
 516 static struct snd_pcm_ops snd_cx88_pcm_ops = {
 517         .open = snd_cx88_pcm_open,
 518         .close = snd_cx88_close,
 519         .ioctl = snd_pcm_lib_ioctl,
 520         .hw_params = snd_cx88_hw_params,
 521         .hw_free = snd_cx88_hw_free,
 522         .prepare = snd_cx88_prepare,
 523         .trigger = snd_cx88_card_trigger,
 524         .pointer = snd_cx88_pointer,
 525         .page = snd_cx88_page,
 526 };
 527
 528 /*
 529  * create a PCM device
 530  */
 531 static int __devinit snd_cx88_pcm(snd_cx88_card_t *chip, int device, char *name)
 532 {
 533         int err;
 534         struct snd_pcm *pcm;
 535
 536         err = snd_pcm_new(chip->card, name, device, 0, 1, &pcm);
 537         if (err < 0)
 538                 return err;
 539         pcm->private_data = chip;
 540         strcpy(pcm->name, name);
 541         snd_pcm_set_ops(pcm, SNDRV_PCM_STREAM_CAPTURE, &snd_cx88_pcm_ops);
 542
 543         return 0;
 544 }
 545
 546 /****************************************************************************
 547                                 CONTROL INTERFACE
 548  ****************************************************************************/
 549 static int snd_cx88_volume_info(struct snd_kcontrol *kcontrol,
 550                                 struct snd_ctl_elem_info *info)
 551 {
 552         info->type = SNDRV_CTL_ELEM_TYPE_INTEGER;
 553         info->count = 2;
 554         info->value.integer.min = 0;
 555         info->value.integer.max = 0x3f;
 556
 557         return 0;
 558 }
 559
 560 static int snd_cx88_volume_get(struct snd_kcontrol *kcontrol,
 561                                struct snd_ctl_elem_value *value)
 562 {
 563         snd_cx88_card_t *chip = snd_kcontrol_chip(kcontrol);
 564         struct cx88_core *core=chip->core;
 565         int vol = 0x3f - (cx_read(AUD_VOL_CTL) & 0x3f),
 566             bal = cx_read(AUD_BAL_CTL);
 567
 568         value->value.integer.value[(bal & 0x40) ? 0 : 1] = vol;
 569         vol -= (bal & 0x3f);
 570         value->value.integer.value[(bal & 0x40) ? 1 : 0] = vol < 0 ? 0 : vol;
 571
 572         return 0;
 573 }
 574
 575 /* OK - TODO: test it */
 576 static int snd_cx88_volume_put(struct snd_kcontrol *kcontrol,
 577                                struct snd_ctl_elem_value *value)
 578 {
 579         snd_cx88_card_t *chip = snd_kcontrol_chip(kcontrol);
 580         struct cx88_core *core=chip->core;
 581         int v, b;
 582         int changed = 0;
 583         u32 old;
 584
 585         b = value->value.integer.value[1] - value->value.integer.value[0];
 586         if (b < 0) {
 587             v = 0x3f - value->value.integer.value[0];
 588             b = (-b) | 0x40;
 589         } else {
 590             v = 0x3f - value->value.integer.value[1];
 591         }
 592         /* Do we really know this will always be called with IRQs on? */
 593         spin_lock_irq(&chip->reg_lock);
 594         old = cx_read(AUD_VOL_CTL);
 595         if (v != (old & 0x3f)) {
 596             cx_write(AUD_VOL_CTL, (old & ~0x3f) | v);
 597             changed = 1;
 598         }
 599         if (cx_read(AUD_BAL_CTL) != b) {
 600             cx_write(AUD_BAL_CTL, b);
 601             changed = 1;
 602         }
 603         spin_unlock_irq(&chip->reg_lock);
 604
 605         return changed;
 606 }
 607
 608 static const DECLARE_TLV_DB_SCALE(snd_cx88_db_scale, -6300, 100, 0);
 609
 610 static struct snd_kcontrol_new snd_cx88_volume = {
 611         .iface = SNDRV_CTL_ELEM_IFACE_MIXER,
 612         .access = SNDRV_CTL_ELEM_ACCESS_READWRITE |
 613                   SNDRV_CTL_ELEM_ACCESS_TLV_READ,
 614         .name = "Playback Volume",
 615         .info = snd_cx88_volume_info,
 616         .get = snd_cx88_volume_get,
 617         .put = snd_cx88_volume_put,
 618         .tlv.p = snd_cx88_db_scale,
 619 };
 620
 621 static int snd_cx88_switch_get(struct snd_kcontrol *kcontrol,
 622                                struct snd_ctl_elem_value *value)
 623 {
 624         snd_cx88_card_t *chip = snd_kcontrol_chip(kcontrol);
 625         struct cx88_core *core = chip->core;
 626         u32 bit = kcontrol->private_value;
 627
 628         value->value.integer.value[0] = !(cx_read(AUD_VOL_CTL) & bit);
 629         return 0;
 630 }
 631
 632 static int snd_cx88_switch_put(struct snd_kcontrol *kcontrol,
 633                                        struct snd_ctl_elem_value *value)
 634 {
 635         snd_cx88_card_t *chip = snd_kcontrol_chip(kcontrol);
 636         struct cx88_core *core = chip->core;
 637         u32 bit = kcontrol->private_value;
 638         int ret = 0;
 639         u32 vol;
 640
 641         spin_lock_irq(&chip->reg_lock);
 642         vol = cx_read(AUD_VOL_CTL);
 643         if (value->value.integer.value[0] != !(vol & bit)) {
 644                 vol ^= bit;
 645                 cx_write(AUD_VOL_CTL, vol);
 646                 ret = 1;
 647         }
 648         spin_unlock_irq(&chip->reg_lock);
 649         return ret;
 650 }
 651
 652 static struct snd_kcontrol_new snd_cx88_dac_switch = {
 653         .iface = SNDRV_CTL_ELEM_IFACE_MIXER,
 654         .name = "Playback Switch",
 655         .info = snd_ctl_boolean_mono_info,
 656         .get = snd_cx88_switch_get,
 657         .put = snd_cx88_switch_put,
 658         .private_value = (1<<8),
 659 };
 660
 661 static struct snd_kcontrol_new snd_cx88_source_switch = {
 662         .iface = SNDRV_CTL_ELEM_IFACE_MIXER,
 663         .name = "Capture Switch",
 664         .info = snd_ctl_boolean_mono_info,
 665         .get = snd_cx88_switch_get,
 666         .put = snd_cx88_switch_put,
 667         .private_value = (1<<6),
 668 };
 669
 670 /****************************************************************************
 671                         Basic Flow for Sound Devices
 672  ****************************************************************************/
 673
 674 /*
 675  * PCI ID Table - 14f1:8801 and 14f1:8811 means function 1: Audio
 676  * Only boards with eeprom and byte 1 at eeprom=1 have it
 677  */
 678
 679 static struct pci_device_id cx88_audio_pci_tbl[] __devinitdata = {
 680         {0x14f1,0x8801,PCI_ANY_ID,PCI_ANY_ID,0,0,0},
 681         {0x14f1,0x8811,PCI_ANY_ID,PCI_ANY_ID,0,0,0},
 682         {0, }
 683 };
 684 MODULE_DEVICE_TABLE(pci, cx88_audio_pci_tbl);
 685
 686 /*
 687  * Chip-specific destructor
 688  */
 689
 690 static int snd_cx88_free(snd_cx88_card_t *chip)
 691 {
 692
 693         if (chip->irq >= 0)
 694                 free_irq(chip->irq, chip);
 695
 696         cx88_core_put(chip->core,chip->pci);
 697
 698         pci_disable_device(chip->pci);
 699         return 0;
 700 }
 701
 702 /*
 703  * Component Destructor
 704  */
 705 static void snd_cx88_dev_free(struct snd_card * card)
 706 {
 707         snd_cx88_card_t *chip = card->private_data;
 708
 709         snd_cx88_free(chip);
 710 }
 711
 712
 713 /*
 714  * Alsa Constructor - Component probe
 715  */
 716
 717 static int devno;
 718 static int __devinit snd_cx88_create(struct snd_card *card,
 719                                      struct pci_dev *pci,
 720                                      snd_cx88_card_t **rchip)
 721 {
 722         snd_cx88_card_t   *chip;
 723         struct cx88_core  *core;
 724         int               err;
 725         unsigned char     pci_lat;
 726
 727         *rchip = NULL;
 728
 729         err = pci_enable_device(pci);
 730         if (err < 0)
 731                 return err;
 732
 733         pci_set_master(pci);
 734
 735         chip = (snd_cx88_card_t *) card->private_data;
 736
 737         core = cx88_core_get(pci);
 738         if (NULL == core) {
 739                 err = -EINVAL;
 740                 kfree (chip);
 741                 return err;
 742         }
 743
 744         if (!pci_dma_supported(pci,DMA_32BIT_MASK)) {
 745                 dprintk(0, "%s/1: Oops: no 32bit PCI DMA ???\n",core->name);
 746                 err = -EIO;
 747                 cx88_core_put(core,pci);
 748                 return err;
 749         }
 750
 751
 752         /* pci init */
 753         chip->card = card;
 754         chip->pci = pci;
 755         chip->irq = -1;
 756         spin_lock_init(&chip->reg_lock);
 757
 758         chip->core = core;
 759
 760         /* get irq */
 761         err = request_irq(chip->pci->irq, cx8801_irq,
 762                           IRQF_SHARED | IRQF_DISABLED, chip->core->name, chip);
 763         if (err < 0) {
 764                 dprintk(0, "%s: can't get IRQ %d\n",
 765                        chip->core->name, chip->pci->irq);
 766                 return err;
 767         }
 768
 769         /* print pci info */
 770         pci_read_config_byte(pci, PCI_LATENCY_TIMER, &pci_lat);
 771
 772         dprintk(1,"ALSA %s/%i: found at %s, rev: %d, irq: %d, "
 773                "latency: %d, mmio: 0x%llx\n", core->name, devno,
 774                pci_name(pci), pci->revision, pci->irq,
 775                pci_lat, (unsigned long long)pci_resource_start(pci,0));
 776
 777         chip->irq = pci->irq;
 778         synchronize_irq(chip->irq);
 779
 780         snd_card_set_dev(card, &pci->dev);
 781
 782         *rchip = chip;
 783
 784         return 0;
 785 }
 786
 787 static int __devinit cx88_audio_initdev(struct pci_dev *pci,
 788                                     const struct pci_device_id *pci_id)
 789 {
 790         struct snd_card  *card;
 791         snd_cx88_card_t  *chip;
 792         int              err;
 793
 794         if (devno >= SNDRV_CARDS)
 795                 return (-ENODEV);
 796
 797         if (!enable[devno]) {
 798                 ++devno;
 799                 return (-ENOENT);
 800         }
 801
 802         card = snd_card_new(index[devno], id[devno], THIS_MODULE, sizeof(snd_cx88_card_t));
 803         if (!card)
 804                 return (-ENOMEM);
 805
 806         card->private_free = snd_cx88_dev_free;
 807
 808         err = snd_cx88_create(card, pci, &chip);
 809         if (err < 0)
 810                 return (err);
 811
 812         err = snd_cx88_pcm(chip, 0, "CX88 Digital");
 813         if (err < 0)
 814                 goto error;
 815
 816         err = snd_ctl_add(card, snd_ctl_new1(&snd_cx88_volume, chip));
 817         if (err < 0)
 818                 goto error;
 819         err = snd_ctl_add(card, snd_ctl_new1(&snd_cx88_dac_switch, chip));
 820         if (err < 0)
 821                 goto error;
 822         err = snd_ctl_add(card, snd_ctl_new1(&snd_cx88_source_switch, chip));
 823         if (err < 0)
 824                 goto error;
 825
 826         strcpy (card->driver, "CX88x");
 827         sprintf(card->shortname, "Conexant CX%x", pci->device);
 828         sprintf(card->longname, "%s at %#llx",
 829                 card->shortname,(unsigned long long)pci_resource_start(pci, 0));
 830         strcpy (card->mixername, "CX88");
 831
 832         dprintk (0, "%s/%i: ALSA support for cx2388x boards\n",
 833                card->driver,devno);
 834
 835         err = snd_card_register(card);
 836         if (err < 0)
 837                 goto error;
 838         pci_set_drvdata(pci,card);
 839
 840         devno++;
 841         return 0;
 842
 843 error:
 844         snd_card_free(card);
 845         return err;
 846 }
 847 /*
 848  * ALSA destructor
 849  */
 850 static void __devexit cx88_audio_finidev(struct pci_dev *pci)
 851 {
 852         struct cx88_audio_dev *card = pci_get_drvdata(pci);
 853
 854         snd_card_free((void *)card);
 855
 856         pci_set_drvdata(pci, NULL);
 857
 858         devno--;
 859 }
 860
 861 /*
 862  * PCI driver definition
 863  */
 864
 865 static struct pci_driver cx88_audio_pci_driver = {
 866         .name     = "cx88_audio",
 867         .id_table = cx88_audio_pci_tbl,
 868         .probe    = cx88_audio_initdev,
 869         .remove   = cx88_audio_finidev,
 870 };
 871
 872 /****************************************************************************
 873                                 LINUX MODULE INIT
 874  ****************************************************************************/
 875
 876 /*
 877  * module init
 878  */
 879 static int cx88_audio_init(void)
 880 {
 881         printk(KERN_INFO "cx2388x alsa driver version %d.%d.%d loaded\n",
 882                (CX88_VERSION_CODE >> 16) & 0xff,
 883                (CX88_VERSION_CODE >>  8) & 0xff,
 884                CX88_VERSION_CODE & 0xff);
 885 #ifdef SNAPSHOT
 886         printk(KERN_INFO "cx2388x: snapshot date %04d-%02d-%02d\n",
 887                SNAPSHOT/10000, (SNAPSHOT/100)%100, SNAPSHOT%100);
 888 #endif
 889         return pci_register_driver(&cx88_audio_pci_driver);
 890 }
 891
 892 /*
 893  * module remove
 894  */
 895 static void cx88_audio_fini(void)
 896 {
 897
 898         pci_unregister_driver(&cx88_audio_pci_driver);
 899 }
 900
 901 module_init(cx88_audio_init);
 902 module_exit(cx88_audio_fini);
 903
 904 /* ----------------------------------------------------------- */
 905 /*
 906  * Local variables:
 907  * c-basic-offset: 8
 908  * End:
 909  */