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 #include <linux/slab.h>
  35
  36 #include <asm/delay.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 #include <media/wm8775.h>
  44
  45 #include "cx88.h"
  46 #include "cx88-reg.h"
  47
  48 #define dprintk(level,fmt, arg...)      if (debug >= level) \
  49         printk(KERN_INFO "%s/1: " fmt, chip->core->name , ## arg)
  50
  51 #define dprintk_core(level,fmt, arg...) if (debug >= level) \
  52         printk(KERN_DEBUG "%s/1: " fmt, chip->core->name , ## arg)
  53
  54 /****************************************************************************
  55         Data type declarations - Can be moded to a header file later
  56  ****************************************************************************/
  57
  58 struct cx88_audio_buffer {
  59         unsigned int               bpl;
  60         struct btcx_riscmem        risc;
  61         struct videobuf_dmabuf     dma;
  62 };
  63
  64 struct cx88_audio_dev {
  65         struct cx88_core           *core;
  66         struct cx88_dmaqueue       q;
  67
  68         /* pci i/o */
  69         struct pci_dev             *pci;
  70
  71         /* audio controls */
  72         int                        irq;
  73
  74         struct snd_card            *card;
  75
  76         spinlock_t                 reg_lock;
  77         atomic_t                   count;
  78
  79         unsigned int               dma_size;
  80         unsigned int               period_size;
  81         unsigned int               num_periods;
  82
  83         struct videobuf_dmabuf     *dma_risc;
  84
  85         struct cx88_audio_buffer   *buf;
  86
  87         struct snd_pcm_substream   *substream;
  88 };
  89 typedef struct cx88_audio_dev snd_cx88_card_t;
  90
  91
  92
  93 /****************************************************************************
  94                         Module global static vars
  95  ****************************************************************************/
  96
  97 static int index[SNDRV_CARDS] = SNDRV_DEFAULT_IDX;      /* Index 0-MAX */
  98 static const char *id[SNDRV_CARDS] = SNDRV_DEFAULT_STR; /* ID for this card */
  99 static int enable[SNDRV_CARDS] = {1, [1 ... (SNDRV_CARDS - 1)] = 1};
 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@infradead.org>");
 115 MODULE_LICENSE("GPL");
 116 MODULE_VERSION(CX88_VERSION);
 117
 118 MODULE_SUPPORTED_DEVICE("{{Conexant,23881},"
 119                         "{{Conexant,23882},"
 120                         "{{Conexant,23883}");
 121 static unsigned int debug;
 122 module_param(debug,int,0644);
 123 MODULE_PARM_DESC(debug,"enable debug messages");
 124
 125 /****************************************************************************
 126                         Module specific funtions
 127  ****************************************************************************/
 128
 129 /*
 130  * BOARD Specific: Sets audio DMA
 131  */
 132
 133 static int _cx88_start_audio_dma(snd_cx88_card_t *chip)
 134 {
 135         struct cx88_audio_buffer *buf = chip->buf;
 136         struct cx88_core *core=chip->core;
 137         const struct sram_channel *audio_ch = &cx88_sram_channels[SRAM_CH25];
 138
 139         /* Make sure RISC/FIFO are off before changing FIFO/RISC settings */
 140         cx_clear(MO_AUD_DMACNTRL, 0x11);
 141
 142         /* setup fifo + format - out channel */
 143         cx88_sram_channel_setup(chip->core, audio_ch, buf->bpl, buf->risc.dma);
 144
 145         /* sets bpl size */
 146         cx_write(MO_AUDD_LNGTH, buf->bpl);
 147
 148         /* reset counter */
 149         cx_write(MO_AUDD_GPCNTRL, GP_COUNT_CONTROL_RESET);
 150         atomic_set(&chip->count, 0);
 151
 152         dprintk(1, "Start audio DMA, %d B/line, %d lines/FIFO, %d periods, %d "
 153                 "byte buffer\n", buf->bpl, cx_read(audio_ch->cmds_start + 8)>>1,
 154                 chip->num_periods, buf->bpl * chip->num_periods);
 155
 156         /* Enables corresponding bits at AUD_INT_STAT */
 157         cx_write(MO_AUD_INTMSK, AUD_INT_OPC_ERR | AUD_INT_DN_SYNC |
 158                                 AUD_INT_DN_RISCI2 | AUD_INT_DN_RISCI1);
 159
 160         /* Clean any pending interrupt bits already set */
 161         cx_write(MO_AUD_INTSTAT, ~0);
 162
 163         /* enable audio irqs */
 164         cx_set(MO_PCI_INTMSK, chip->core->pci_irqmask | PCI_INT_AUDINT);
 165
 166         /* start dma */
 167         cx_set(MO_DEV_CNTRL2, (1<<5)); /* Enables Risc Processor */
 168         cx_set(MO_AUD_DMACNTRL, 0x11); /* audio downstream FIFO and RISC enable */
 169
 170         if (debug)
 171                 cx88_sram_channel_dump(chip->core, audio_ch);
 172
 173         return 0;
 174 }
 175
 176 /*
 177  * BOARD Specific: Resets audio DMA
 178  */
 179 static int _cx88_stop_audio_dma(snd_cx88_card_t *chip)
 180 {
 181         struct cx88_core *core=chip->core;
 182         dprintk(1, "Stopping audio DMA\n");
 183
 184         /* stop dma */
 185         cx_clear(MO_AUD_DMACNTRL, 0x11);
 186
 187         /* disable irqs */
 188         cx_clear(MO_PCI_INTMSK, PCI_INT_AUDINT);
 189         cx_clear(MO_AUD_INTMSK, AUD_INT_OPC_ERR | AUD_INT_DN_SYNC |
 190                                 AUD_INT_DN_RISCI2 | AUD_INT_DN_RISCI1);
 191
 192         if (debug)
 193                 cx88_sram_channel_dump(chip->core, &cx88_sram_channels[SRAM_CH25]);
 194
 195         return 0;
 196 }
 197
 198 #define MAX_IRQ_LOOP 50
 199
 200 /*
 201  * BOARD Specific: IRQ dma bits
 202  */
 203 static const char *cx88_aud_irqs[32] = {
 204         "dn_risci1", "up_risci1", "rds_dn_risc1", /* 0-2 */
 205         NULL,                                     /* reserved */
 206         "dn_risci2", "up_risci2", "rds_dn_risc2", /* 4-6 */
 207         NULL,                                     /* reserved */
 208         "dnf_of", "upf_uf", "rds_dnf_uf",         /* 8-10 */
 209         NULL,                                     /* reserved */
 210         "dn_sync", "up_sync", "rds_dn_sync",      /* 12-14 */
 211         NULL,                                     /* reserved */
 212         "opc_err", "par_err", "rip_err",          /* 16-18 */
 213         "pci_abort", "ber_irq", "mchg_irq"        /* 19-21 */
 214 };
 215
 216 /*
 217  * BOARD Specific: Threats IRQ audio specific calls
 218  */
 219 static void cx8801_aud_irq(snd_cx88_card_t *chip)
 220 {
 221         struct cx88_core *core = chip->core;
 222         u32 status, mask;
 223
 224         status = cx_read(MO_AUD_INTSTAT);
 225         mask   = cx_read(MO_AUD_INTMSK);
 226         if (0 == (status & mask))
 227                 return;
 228         cx_write(MO_AUD_INTSTAT, status);
 229         if (debug > 1  ||  (status & mask & ~0xff))
 230                 cx88_print_irqbits(core->name, "irq aud",
 231                                    cx88_aud_irqs, ARRAY_SIZE(cx88_aud_irqs),
 232                                    status, mask);
 233         /* risc op code error */
 234         if (status & AUD_INT_OPC_ERR) {
 235                 printk(KERN_WARNING "%s/1: Audio risc op code error\n",core->name);
 236                 cx_clear(MO_AUD_DMACNTRL, 0x11);
 237                 cx88_sram_channel_dump(core, &cx88_sram_channels[SRAM_CH25]);
 238         }
 239         if (status & AUD_INT_DN_SYNC) {
 240                 dprintk(1, "Downstream sync error\n");
 241                 cx_write(MO_AUDD_GPCNTRL, GP_COUNT_CONTROL_RESET);
 242                 return;
 243         }
 244         /* risc1 downstream */
 245         if (status & AUD_INT_DN_RISCI1) {
 246                 atomic_set(&chip->count, cx_read(MO_AUDD_GPCNT));
 247                 snd_pcm_period_elapsed(chip->substream);
 248         }
 249         /* FIXME: Any other status should deserve a special handling? */
 250 }
 251
 252 /*
 253  * BOARD Specific: Handles IRQ calls
 254  */
 255 static irqreturn_t cx8801_irq(int irq, void *dev_id)
 256 {
 257         snd_cx88_card_t *chip = dev_id;
 258         struct cx88_core *core = chip->core;
 259         u32 status;
 260         int loop, handled = 0;
 261
 262         for (loop = 0; loop < MAX_IRQ_LOOP; loop++) {
 263                 status = cx_read(MO_PCI_INTSTAT) &
 264                         (core->pci_irqmask | PCI_INT_AUDINT);
 265                 if (0 == status)
 266                         goto out;
 267                 dprintk(3, "cx8801_irq loop %d/%d, status %x\n",
 268                         loop, MAX_IRQ_LOOP, status);
 269                 handled = 1;
 270                 cx_write(MO_PCI_INTSTAT, status);
 271
 272                 if (status & core->pci_irqmask)
 273                         cx88_core_irq(core, status);
 274                 if (status & PCI_INT_AUDINT)
 275                         cx8801_aud_irq(chip);
 276         }
 277
 278         if (MAX_IRQ_LOOP == loop) {
 279                 printk(KERN_ERR
 280                        "%s/1: IRQ loop detected, disabling interrupts\n",
 281                        core->name);
 282                 cx_clear(MO_PCI_INTMSK, PCI_INT_AUDINT);
 283         }
 284
 285  out:
 286         return IRQ_RETVAL(handled);
 287 }
 288
 289
 290 static int dsp_buffer_free(snd_cx88_card_t *chip)
 291 {
 292         BUG_ON(!chip->dma_size);
 293
 294         dprintk(2,"Freeing buffer\n");
 295         videobuf_dma_unmap(&chip->pci->dev, chip->dma_risc);
 296         videobuf_dma_free(chip->dma_risc);
 297         btcx_riscmem_free(chip->pci,&chip->buf->risc);
 298         kfree(chip->buf);
 299
 300         chip->dma_risc = NULL;
 301         chip->dma_size = 0;
 302
 303         return 0;
 304 }
 305
 306 /****************************************************************************
 307                                 ALSA PCM Interface
 308  ****************************************************************************/
 309
 310 /*
 311  * Digital hardware definition
 312  */
 313 #define DEFAULT_FIFO_SIZE       4096
 314 static const struct snd_pcm_hardware snd_cx88_digital_hw = {
 315         .info = SNDRV_PCM_INFO_MMAP |
 316                 SNDRV_PCM_INFO_INTERLEAVED |
 317                 SNDRV_PCM_INFO_BLOCK_TRANSFER |
 318                 SNDRV_PCM_INFO_MMAP_VALID,
 319         .formats = SNDRV_PCM_FMTBIT_S16_LE,
 320
 321         .rates =                SNDRV_PCM_RATE_48000,
 322         .rate_min =             48000,
 323         .rate_max =             48000,
 324         .channels_min = 2,
 325         .channels_max = 2,
 326         /* Analog audio output will be full of clicks and pops if there
 327            are not exactly four lines in the SRAM FIFO buffer.  */
 328         .period_bytes_min = DEFAULT_FIFO_SIZE/4,
 329         .period_bytes_max = DEFAULT_FIFO_SIZE/4,
 330         .periods_min = 1,
 331         .periods_max = 1024,
 332         .buffer_bytes_max = (1024*1024),
 333 };
 334
 335 /*
 336  * audio pcm capture open callback
 337  */
 338 static int snd_cx88_pcm_open(struct snd_pcm_substream *substream)
 339 {
 340         snd_cx88_card_t *chip = snd_pcm_substream_chip(substream);
 341         struct snd_pcm_runtime *runtime = substream->runtime;
 342         int err;
 343
 344         if (!chip) {
 345                 printk(KERN_ERR "BUG: cx88 can't find device struct."
 346                                 " Can't proceed with open\n");
 347                 return -ENODEV;
 348         }
 349
 350         err = snd_pcm_hw_constraint_pow2(runtime, 0, SNDRV_PCM_HW_PARAM_PERIODS);
 351         if (err < 0)
 352                 goto _error;
 353
 354         chip->substream = substream;
 355
 356         runtime->hw = snd_cx88_digital_hw;
 357
 358         if (cx88_sram_channels[SRAM_CH25].fifo_size != DEFAULT_FIFO_SIZE) {
 359                 unsigned int bpl = cx88_sram_channels[SRAM_CH25].fifo_size / 4;
 360                 bpl &= ~7; /* must be multiple of 8 */
 361                 runtime->hw.period_bytes_min = bpl;
 362                 runtime->hw.period_bytes_max = bpl;
 363         }
 364
 365         return 0;
 366 _error:
 367         dprintk(1,"Error opening PCM!\n");
 368         return err;
 369 }
 370
 371 /*
 372  * audio close callback
 373  */
 374 static int snd_cx88_close(struct snd_pcm_substream *substream)
 375 {
 376         return 0;
 377 }
 378
 379 /*
 380  * hw_params callback
 381  */
 382 static int snd_cx88_hw_params(struct snd_pcm_substream * substream,
 383                               struct snd_pcm_hw_params * hw_params)
 384 {
 385         snd_cx88_card_t *chip = snd_pcm_substream_chip(substream);
 386         struct videobuf_dmabuf *dma;
 387
 388         struct cx88_audio_buffer *buf;
 389         int ret;
 390
 391         if (substream->runtime->dma_area) {
 392                 dsp_buffer_free(chip);
 393                 substream->runtime->dma_area = NULL;
 394         }
 395
 396         chip->period_size = params_period_bytes(hw_params);
 397         chip->num_periods = params_periods(hw_params);
 398         chip->dma_size = chip->period_size * params_periods(hw_params);
 399
 400         BUG_ON(!chip->dma_size);
 401         BUG_ON(chip->num_periods & (chip->num_periods-1));
 402
 403         buf = kzalloc(sizeof(*buf), GFP_KERNEL);
 404         if (NULL == buf)
 405                 return -ENOMEM;
 406
 407         buf->bpl = chip->period_size;
 408
 409         dma = &buf->dma;
 410         videobuf_dma_init(dma);
 411         ret = videobuf_dma_init_kernel(dma, PCI_DMA_FROMDEVICE,
 412                         (PAGE_ALIGN(chip->dma_size) >> PAGE_SHIFT));
 413         if (ret < 0)
 414                 goto error;
 415
 416         ret = videobuf_dma_map(&chip->pci->dev, dma);
 417         if (ret < 0)
 418                 goto error;
 419
 420         ret = cx88_risc_databuffer(chip->pci, &buf->risc, dma->sglist,
 421                                    chip->period_size, chip->num_periods, 1);
 422         if (ret < 0)
 423                 goto error;
 424
 425         /* Loop back to start of program */
 426         buf->risc.jmp[0] = cpu_to_le32(RISC_JUMP|RISC_IRQ1|RISC_CNT_INC);
 427         buf->risc.jmp[1] = cpu_to_le32(buf->risc.dma);
 428
 429         chip->buf = buf;
 430         chip->dma_risc = dma;
 431
 432         substream->runtime->dma_area = chip->dma_risc->vaddr;
 433         substream->runtime->dma_bytes = chip->dma_size;
 434         substream->runtime->dma_addr = 0;
 435         return 0;
 436
 437 error:
 438         kfree(buf);
 439         return ret;
 440 }
 441
 442 /*
 443  * hw free callback
 444  */
 445 static int snd_cx88_hw_free(struct snd_pcm_substream * substream)
 446 {
 447
 448         snd_cx88_card_t *chip = snd_pcm_substream_chip(substream);
 449
 450         if (substream->runtime->dma_area) {
 451                 dsp_buffer_free(chip);
 452                 substream->runtime->dma_area = NULL;
 453         }
 454
 455         return 0;
 456 }
 457
 458 /*
 459  * prepare callback
 460  */
 461 static int snd_cx88_prepare(struct snd_pcm_substream *substream)
 462 {
 463         return 0;
 464 }
 465
 466 /*
 467  * trigger callback
 468  */
 469 static int snd_cx88_card_trigger(struct snd_pcm_substream *substream, int cmd)
 470 {
 471         snd_cx88_card_t *chip = snd_pcm_substream_chip(substream);
 472         int err;
 473
 474         /* Local interrupts are already disabled by ALSA */
 475         spin_lock(&chip->reg_lock);
 476
 477         switch (cmd) {
 478         case SNDRV_PCM_TRIGGER_START:
 479                 err=_cx88_start_audio_dma(chip);
 480                 break;
 481         case SNDRV_PCM_TRIGGER_STOP:
 482                 err=_cx88_stop_audio_dma(chip);
 483                 break;
 484         default:
 485                 err=-EINVAL;
 486                 break;
 487         }
 488
 489         spin_unlock(&chip->reg_lock);
 490
 491         return err;
 492 }
 493
 494 /*
 495  * pointer callback
 496  */
 497 static snd_pcm_uframes_t snd_cx88_pointer(struct snd_pcm_substream *substream)
 498 {
 499         snd_cx88_card_t *chip = snd_pcm_substream_chip(substream);
 500         struct snd_pcm_runtime *runtime = substream->runtime;
 501         u16 count;
 502
 503         count = atomic_read(&chip->count);
 504
 505 //      dprintk(2, "%s - count %d (+%u), period %d, frame %lu\n", __func__,
 506 //              count, new, count & (runtime->periods-1),
 507 //              runtime->period_size * (count & (runtime->periods-1)));
 508         return runtime->period_size * (count & (runtime->periods-1));
 509 }
 510
 511 /*
 512  * page callback (needed for mmap)
 513  */
 514 static struct page *snd_cx88_page(struct snd_pcm_substream *substream,
 515                                 unsigned long offset)
 516 {
 517         void *pageptr = substream->runtime->dma_area + offset;
 518         return vmalloc_to_page(pageptr);
 519 }
 520
 521 /*
 522  * operators
 523  */
 524 static struct snd_pcm_ops snd_cx88_pcm_ops = {
 525         .open = snd_cx88_pcm_open,
 526         .close = snd_cx88_close,
 527         .ioctl = snd_pcm_lib_ioctl,
 528         .hw_params = snd_cx88_hw_params,
 529         .hw_free = snd_cx88_hw_free,
 530         .prepare = snd_cx88_prepare,
 531         .trigger = snd_cx88_card_trigger,
 532         .pointer = snd_cx88_pointer,
 533         .page = snd_cx88_page,
 534 };
 535
 536 /*
 537  * create a PCM device
 538  */
 539 static int __devinit snd_cx88_pcm(snd_cx88_card_t *chip, int device, const char *name)
 540 {
 541         int err;
 542         struct snd_pcm *pcm;
 543
 544         err = snd_pcm_new(chip->card, name, device, 0, 1, &pcm);
 545         if (err < 0)
 546                 return err;
 547         pcm->private_data = chip;
 548         strcpy(pcm->name, name);
 549         snd_pcm_set_ops(pcm, SNDRV_PCM_STREAM_CAPTURE, &snd_cx88_pcm_ops);
 550
 551         return 0;
 552 }
 553
 554 /****************************************************************************
 555                                 CONTROL INTERFACE
 556  ****************************************************************************/
 557 static int snd_cx88_volume_info(struct snd_kcontrol *kcontrol,
 558                                 struct snd_ctl_elem_info *info)
 559 {
 560         info->type = SNDRV_CTL_ELEM_TYPE_INTEGER;
 561         info->count = 2;
 562         info->value.integer.min = 0;
 563         info->value.integer.max = 0x3f;
 564
 565         return 0;
 566 }
 567
 568 static int snd_cx88_volume_get(struct snd_kcontrol *kcontrol,
 569                                struct snd_ctl_elem_value *value)
 570 {
 571         snd_cx88_card_t *chip = snd_kcontrol_chip(kcontrol);
 572         struct cx88_core *core=chip->core;
 573         int vol = 0x3f - (cx_read(AUD_VOL_CTL) & 0x3f),
 574             bal = cx_read(AUD_BAL_CTL);
 575
 576         value->value.integer.value[(bal & 0x40) ? 0 : 1] = vol;
 577         vol -= (bal & 0x3f);
 578         value->value.integer.value[(bal & 0x40) ? 1 : 0] = vol < 0 ? 0 : vol;
 579
 580         return 0;
 581 }
 582
 583 static void snd_cx88_wm8775_volume_put(struct snd_kcontrol *kcontrol,
 584                                struct snd_ctl_elem_value *value)
 585 {
 586         snd_cx88_card_t *chip = snd_kcontrol_chip(kcontrol);
 587         struct cx88_core *core = chip->core;
 588         struct v4l2_control client_ctl;
 589         int left = value->value.integer.value[0];
 590         int right = value->value.integer.value[1];
 591         int v, b;
 592
 593         memset(&client_ctl, 0, sizeof(client_ctl));
 594
 595         /* Pass volume & balance onto any WM8775 */
 596         if (left >= right) {
 597                 v = left << 10;
 598                 b = left ? (0x8000 * right) / left : 0x8000;
 599         } else {
 600                 v = right << 10;
 601                 b = right ? 0xffff - (0x8000 * left) / right : 0x8000;
 602         }
 603         client_ctl.value = v;
 604         client_ctl.id = V4L2_CID_AUDIO_VOLUME;
 605         call_hw(core, WM8775_GID, core, s_ctrl, &client_ctl);
 606
 607         client_ctl.value = b;
 608         client_ctl.id = V4L2_CID_AUDIO_BALANCE;
 609         call_hw(core, WM8775_GID, core, s_ctrl, &client_ctl);
 610 }
 611
 612 /* OK - TODO: test it */
 613 static int snd_cx88_volume_put(struct snd_kcontrol *kcontrol,
 614                                struct snd_ctl_elem_value *value)
 615 {
 616         snd_cx88_card_t *chip = snd_kcontrol_chip(kcontrol);
 617         struct cx88_core *core=chip->core;
 618         int left, right, v, b;
 619         int changed = 0;
 620         u32 old;
 621
 622         if (core->board.audio_chip == V4L2_IDENT_WM8775)
 623                 snd_cx88_wm8775_volume_put(kcontrol, value);
 624
 625         left = value->value.integer.value[0] & 0x3f;
 626         right = value->value.integer.value[1] & 0x3f;
 627         b = right - left;
 628         if (b < 0) {
 629                 v = 0x3f - left;
 630                 b = (-b) | 0x40;
 631         } else {
 632                 v = 0x3f - right;
 633         }
 634         /* Do we really know this will always be called with IRQs on? */
 635         spin_lock_irq(&chip->reg_lock);
 636         old = cx_read(AUD_VOL_CTL);
 637         if (v != (old & 0x3f)) {
 638                 cx_swrite(SHADOW_AUD_VOL_CTL, AUD_VOL_CTL, (old & ~0x3f) | v);
 639                 changed = 1;
 640         }
 641         if ((cx_read(AUD_BAL_CTL) & 0x7f) != b) {
 642                 cx_write(AUD_BAL_CTL, b);
 643                 changed = 1;
 644         }
 645         spin_unlock_irq(&chip->reg_lock);
 646
 647         return changed;
 648 }
 649
 650 static const DECLARE_TLV_DB_SCALE(snd_cx88_db_scale, -6300, 100, 0);
 651
 652 static const struct snd_kcontrol_new snd_cx88_volume = {
 653         .iface = SNDRV_CTL_ELEM_IFACE_MIXER,
 654         .access = SNDRV_CTL_ELEM_ACCESS_READWRITE |
 655                   SNDRV_CTL_ELEM_ACCESS_TLV_READ,
 656         .name = "Analog-TV Volume",
 657         .info = snd_cx88_volume_info,
 658         .get = snd_cx88_volume_get,
 659         .put = snd_cx88_volume_put,
 660         .tlv.p = snd_cx88_db_scale,
 661 };
 662
 663 static int snd_cx88_switch_get(struct snd_kcontrol *kcontrol,
 664                                struct snd_ctl_elem_value *value)
 665 {
 666         snd_cx88_card_t *chip = snd_kcontrol_chip(kcontrol);
 667         struct cx88_core *core = chip->core;
 668         u32 bit = kcontrol->private_value;
 669
 670         value->value.integer.value[0] = !(cx_read(AUD_VOL_CTL) & bit);
 671         return 0;
 672 }
 673
 674 static int snd_cx88_switch_put(struct snd_kcontrol *kcontrol,
 675                                        struct snd_ctl_elem_value *value)
 676 {
 677         snd_cx88_card_t *chip = snd_kcontrol_chip(kcontrol);
 678         struct cx88_core *core = chip->core;
 679         u32 bit = kcontrol->private_value;
 680         int ret = 0;
 681         u32 vol;
 682
 683         spin_lock_irq(&chip->reg_lock);
 684         vol = cx_read(AUD_VOL_CTL);
 685         if (value->value.integer.value[0] != !(vol & bit)) {
 686                 vol ^= bit;
 687                 cx_swrite(SHADOW_AUD_VOL_CTL, AUD_VOL_CTL, vol);
 688                 /* Pass mute onto any WM8775 */
 689                 if ((core->board.audio_chip == V4L2_IDENT_WM8775) &&
 690                     ((1<<6) == bit)) {
 691                         struct v4l2_control client_ctl;
 692
 693                         memset(&client_ctl, 0, sizeof(client_ctl));
 694                         client_ctl.value = 0 != (vol & bit);
 695                         client_ctl.id = V4L2_CID_AUDIO_MUTE;
 696                         call_hw(core, WM8775_GID, core, s_ctrl, &client_ctl);
 697                 }
 698                 ret = 1;
 699         }
 700         spin_unlock_irq(&chip->reg_lock);
 701         return ret;
 702 }
 703
 704 static const struct snd_kcontrol_new snd_cx88_dac_switch = {
 705         .iface = SNDRV_CTL_ELEM_IFACE_MIXER,
 706         .name = "Audio-Out Switch",
 707         .info = snd_ctl_boolean_mono_info,
 708         .get = snd_cx88_switch_get,
 709         .put = snd_cx88_switch_put,
 710         .private_value = (1<<8),
 711 };
 712
 713 static const struct snd_kcontrol_new snd_cx88_source_switch = {
 714         .iface = SNDRV_CTL_ELEM_IFACE_MIXER,
 715         .name = "Analog-TV Switch",
 716         .info = snd_ctl_boolean_mono_info,
 717         .get = snd_cx88_switch_get,
 718         .put = snd_cx88_switch_put,
 719         .private_value = (1<<6),
 720 };
 721
 722 static int snd_cx88_alc_get(struct snd_kcontrol *kcontrol,
 723                                struct snd_ctl_elem_value *value)
 724 {
 725         snd_cx88_card_t *chip = snd_kcontrol_chip(kcontrol);
 726         struct cx88_core *core = chip->core;
 727         struct v4l2_control client_ctl;
 728
 729         memset(&client_ctl, 0, sizeof(client_ctl));
 730         client_ctl.id = V4L2_CID_AUDIO_LOUDNESS;
 731         call_hw(core, WM8775_GID, core, g_ctrl, &client_ctl);
 732         value->value.integer.value[0] = client_ctl.value ? 1 : 0;
 733
 734         return 0;
 735 }
 736
 737 static int snd_cx88_alc_put(struct snd_kcontrol *kcontrol,
 738                                        struct snd_ctl_elem_value *value)
 739 {
 740         snd_cx88_card_t *chip = snd_kcontrol_chip(kcontrol);
 741         struct cx88_core *core = chip->core;
 742         struct v4l2_control client_ctl;
 743
 744         memset(&client_ctl, 0, sizeof(client_ctl));
 745         client_ctl.value = 0 != value->value.integer.value[0];
 746         client_ctl.id = V4L2_CID_AUDIO_LOUDNESS;
 747         call_hw(core, WM8775_GID, core, s_ctrl, &client_ctl);
 748
 749         return 0;
 750 }
 751
 752 static struct snd_kcontrol_new snd_cx88_alc_switch = {
 753         .iface = SNDRV_CTL_ELEM_IFACE_MIXER,
 754         .name = "Line-In ALC Switch",
 755         .info = snd_ctl_boolean_mono_info,
 756         .get = snd_cx88_alc_get,
 757         .put = snd_cx88_alc_put,
 758 };
 759
 760 /****************************************************************************
 761                         Basic Flow for Sound Devices
 762  ****************************************************************************/
 763
 764 /*
 765  * PCI ID Table - 14f1:8801 and 14f1:8811 means function 1: Audio
 766  * Only boards with eeprom and byte 1 at eeprom=1 have it
 767  */
 768
 769 static const struct pci_device_id const cx88_audio_pci_tbl[] __devinitdata = {
 770         {0x14f1,0x8801,PCI_ANY_ID,PCI_ANY_ID,0,0,0},
 771         {0x14f1,0x8811,PCI_ANY_ID,PCI_ANY_ID,0,0,0},
 772         {0, }
 773 };
 774 MODULE_DEVICE_TABLE(pci, cx88_audio_pci_tbl);
 775
 776 /*
 777  * Chip-specific destructor
 778  */
 779
 780 static int snd_cx88_free(snd_cx88_card_t *chip)
 781 {
 782
 783         if (chip->irq >= 0)
 784                 free_irq(chip->irq, chip);
 785
 786         cx88_core_put(chip->core,chip->pci);
 787
 788         pci_disable_device(chip->pci);
 789         return 0;
 790 }
 791
 792 /*
 793  * Component Destructor
 794  */
 795 static void snd_cx88_dev_free(struct snd_card * card)
 796 {
 797         snd_cx88_card_t *chip = card->private_data;
 798
 799         snd_cx88_free(chip);
 800 }
 801
 802
 803 /*
 804  * Alsa Constructor - Component probe
 805  */
 806
 807 static int devno;
 808 static int __devinit snd_cx88_create(struct snd_card *card,
 809                                      struct pci_dev *pci,
 810                                      snd_cx88_card_t **rchip,
 811                                      struct cx88_core **core_ptr)
 812 {
 813         snd_cx88_card_t   *chip;
 814         struct cx88_core  *core;
 815         int               err;
 816         unsigned char     pci_lat;
 817
 818         *rchip = NULL;
 819
 820         err = pci_enable_device(pci);
 821         if (err < 0)
 822                 return err;
 823
 824         pci_set_master(pci);
 825
 826         chip = card->private_data;
 827
 828         core = cx88_core_get(pci);
 829         if (NULL == core) {
 830                 err = -EINVAL;
 831                 return err;
 832         }
 833
 834         if (!pci_dma_supported(pci,DMA_BIT_MASK(32))) {
 835                 dprintk(0, "%s/1: Oops: no 32bit PCI DMA ???\n",core->name);
 836                 err = -EIO;
 837                 cx88_core_put(core, pci);
 838                 return err;
 839         }
 840
 841
 842         /* pci init */
 843         chip->card = card;
 844         chip->pci = pci;
 845         chip->irq = -1;
 846         spin_lock_init(&chip->reg_lock);
 847
 848         chip->core = core;
 849
 850         /* get irq */
 851         err = request_irq(chip->pci->irq, cx8801_irq,
 852                           IRQF_SHARED | IRQF_DISABLED, chip->core->name, chip);
 853         if (err < 0) {
 854                 dprintk(0, "%s: can't get IRQ %d\n",
 855                        chip->core->name, chip->pci->irq);
 856                 return err;
 857         }
 858
 859         /* print pci info */
 860         pci_read_config_byte(pci, PCI_LATENCY_TIMER, &pci_lat);
 861
 862         dprintk(1,"ALSA %s/%i: found at %s, rev: %d, irq: %d, "
 863                "latency: %d, mmio: 0x%llx\n", core->name, devno,
 864                pci_name(pci), pci->revision, pci->irq,
 865                pci_lat, (unsigned long long)pci_resource_start(pci,0));
 866
 867         chip->irq = pci->irq;
 868         synchronize_irq(chip->irq);
 869
 870         snd_card_set_dev(card, &pci->dev);
 871
 872         *rchip = chip;
 873         *core_ptr = core;
 874
 875         return 0;
 876 }
 877
 878 static int __devinit cx88_audio_initdev(struct pci_dev *pci,
 879                                     const struct pci_device_id *pci_id)
 880 {
 881         struct snd_card  *card;
 882         snd_cx88_card_t  *chip;
 883         struct cx88_core *core = NULL;
 884         int              err;
 885
 886         if (devno >= SNDRV_CARDS)
 887                 return (-ENODEV);
 888
 889         if (!enable[devno]) {
 890                 ++devno;
 891                 return (-ENOENT);
 892         }
 893
 894         err = snd_card_create(index[devno], id[devno], THIS_MODULE,
 895                               sizeof(snd_cx88_card_t), &card);
 896         if (err < 0)
 897                 return err;
 898
 899         card->private_free = snd_cx88_dev_free;
 900
 901         err = snd_cx88_create(card, pci, &chip, &core);
 902         if (err < 0)
 903                 goto error;
 904
 905         err = snd_cx88_pcm(chip, 0, "CX88 Digital");
 906         if (err < 0)
 907                 goto error;
 908
 909         err = snd_ctl_add(card, snd_ctl_new1(&snd_cx88_volume, chip));
 910         if (err < 0)
 911                 goto error;
 912         err = snd_ctl_add(card, snd_ctl_new1(&snd_cx88_dac_switch, chip));
 913         if (err < 0)
 914                 goto error;
 915         err = snd_ctl_add(card, snd_ctl_new1(&snd_cx88_source_switch, chip));
 916         if (err < 0)
 917                 goto error;
 918
 919         /* If there's a wm8775 then add a Line-In ALC switch */
 920         if (core->board.audio_chip == V4L2_IDENT_WM8775)
 921                 snd_ctl_add(card, snd_ctl_new1(&snd_cx88_alc_switch, chip));
 922
 923         strcpy (card->driver, "CX88x");
 924         sprintf(card->shortname, "Conexant CX%x", pci->device);
 925         sprintf(card->longname, "%s at %#llx",
 926                 card->shortname,(unsigned long long)pci_resource_start(pci, 0));
 927         strcpy (card->mixername, "CX88");
 928
 929         dprintk (0, "%s/%i: ALSA support for cx2388x boards\n",
 930                card->driver,devno);
 931
 932         err = snd_card_register(card);
 933         if (err < 0)
 934                 goto error;
 935         pci_set_drvdata(pci,card);
 936
 937         devno++;
 938         return 0;
 939
 940 error:
 941         snd_card_free(card);
 942         return err;
 943 }
 944 /*
 945  * ALSA destructor
 946  */
 947 static void __devexit cx88_audio_finidev(struct pci_dev *pci)
 948 {
 949         struct cx88_audio_dev *card = pci_get_drvdata(pci);
 950
 951         snd_card_free((void *)card);
 952
 953         pci_set_drvdata(pci, NULL);
 954
 955         devno--;
 956 }
 957
 958 /*
 959  * PCI driver definition
 960  */
 961
 962 static struct pci_driver cx88_audio_pci_driver = {
 963         .name     = "cx88_audio",
 964         .id_table = cx88_audio_pci_tbl,
 965         .probe    = cx88_audio_initdev,
 966         .remove   = __devexit_p(cx88_audio_finidev),
 967 };
 968
 969 /****************************************************************************
 970                                 LINUX MODULE INIT
 971  ****************************************************************************/
 972
 973 /*
 974  * module init
 975  */
 976 static int __init cx88_audio_init(void)
 977 {
 978         printk(KERN_INFO "cx2388x alsa driver version %s loaded\n",
 979                CX88_VERSION);
 980         return pci_register_driver(&cx88_audio_pci_driver);
 981 }
 982
 983 /*
 984  * module remove
 985  */
 986 static void __exit cx88_audio_fini(void)
 987 {
 988         pci_unregister_driver(&cx88_audio_pci_driver);
 989 }
 990
 991 module_init(cx88_audio_init);
 992 module_exit(cx88_audio_fini);