drivers/media/pci/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...) do {                                \
  49         if (debug + 1 > level)                                          \
  50                 printk(KERN_INFO "%s/1: " fmt, chip->core->name , ## arg);\
  51 } while(0)
  52
  53 #define dprintk_core(level, fmt, arg...) do {                           \
  54         if (debug + 1 > level)                                          \
  55                 printk(KERN_DEBUG "%s/1: " fmt, chip->core->name , ## arg);\
  56 } while(0)
  57
  58 /****************************************************************************
  59         Data type declarations - Can be moded to a header file later
  60  ****************************************************************************/
  61
  62 struct cx88_audio_buffer {
  63         unsigned int               bpl;
  64         struct btcx_riscmem        risc;
  65         struct videobuf_dmabuf     dma;
  66 };
  67
  68 struct cx88_audio_dev {
  69         struct cx88_core           *core;
  70         struct cx88_dmaqueue       q;
  71
  72         /* pci i/o */
  73         struct pci_dev             *pci;
  74
  75         /* audio controls */
  76         int                        irq;
  77
  78         struct snd_card            *card;
  79
  80         spinlock_t                 reg_lock;
  81         atomic_t                   count;
  82
  83         unsigned int               dma_size;
  84         unsigned int               period_size;
  85         unsigned int               num_periods;
  86
  87         struct videobuf_dmabuf     *dma_risc;
  88
  89         struct cx88_audio_buffer   *buf;
  90
  91         struct snd_pcm_substream   *substream;
  92 };
  93 typedef struct cx88_audio_dev snd_cx88_card_t;
  94
  95
  96
  97 /****************************************************************************
  98                         Module global static vars
  99  ****************************************************************************/
 100
 101 static int index[SNDRV_CARDS] = SNDRV_DEFAULT_IDX;      /* Index 0-MAX */
 102 static const char *id[SNDRV_CARDS] = SNDRV_DEFAULT_STR; /* ID for this card */
 103 static bool enable[SNDRV_CARDS] = {1, [1 ... (SNDRV_CARDS - 1)] = 1};
 104
 105 module_param_array(enable, bool, NULL, 0444);
 106 MODULE_PARM_DESC(enable, "Enable cx88x soundcard. default enabled.");
 107
 108 module_param_array(index, int, NULL, 0444);
 109 MODULE_PARM_DESC(index, "Index value for cx88x capture interface(s).");
 110
 111
 112 /****************************************************************************
 113                                 Module macros
 114  ****************************************************************************/
 115
 116 MODULE_DESCRIPTION("ALSA driver module for cx2388x based TV cards");
 117 MODULE_AUTHOR("Ricardo Cerqueira");
 118 MODULE_AUTHOR("Mauro Carvalho Chehab <mchehab@infradead.org>");
 119 MODULE_LICENSE("GPL");
 120 MODULE_VERSION(CX88_VERSION);
 121
 122 MODULE_SUPPORTED_DEVICE("{{Conexant,23881},"
 123                         "{{Conexant,23882},"
 124                         "{{Conexant,23883}");
 125 static unsigned int debug;
 126 module_param(debug,int,0644);
 127 MODULE_PARM_DESC(debug,"enable debug messages");
 128
 129 /****************************************************************************
 130                         Module specific funtions
 131  ****************************************************************************/
 132
 133 /*
 134  * BOARD Specific: Sets audio DMA
 135  */
 136
 137 static int _cx88_start_audio_dma(snd_cx88_card_t *chip)
 138 {
 139         struct cx88_audio_buffer *buf = chip->buf;
 140         struct cx88_core *core=chip->core;
 141         const struct sram_channel *audio_ch = &cx88_sram_channels[SRAM_CH25];
 142
 143         /* Make sure RISC/FIFO are off before changing FIFO/RISC settings */
 144         cx_clear(MO_AUD_DMACNTRL, 0x11);
 145
 146         /* setup fifo + format - out channel */
 147         cx88_sram_channel_setup(chip->core, audio_ch, buf->bpl, buf->risc.dma);
 148
 149         /* sets bpl size */
 150         cx_write(MO_AUDD_LNGTH, buf->bpl);
 151
 152         /* reset counter */
 153         cx_write(MO_AUDD_GPCNTRL, GP_COUNT_CONTROL_RESET);
 154         atomic_set(&chip->count, 0);
 155
 156         dprintk(1, "Start audio DMA, %d B/line, %d lines/FIFO, %d periods, %d "
 157                 "byte buffer\n", buf->bpl, cx_read(audio_ch->cmds_start + 8)>>1,
 158                 chip->num_periods, buf->bpl * chip->num_periods);
 159
 160         /* Enables corresponding bits at AUD_INT_STAT */
 161         cx_write(MO_AUD_INTMSK, AUD_INT_OPC_ERR | AUD_INT_DN_SYNC |
 162                                 AUD_INT_DN_RISCI2 | AUD_INT_DN_RISCI1);
 163
 164         /* Clean any pending interrupt bits already set */
 165         cx_write(MO_AUD_INTSTAT, ~0);
 166
 167         /* enable audio irqs */
 168         cx_set(MO_PCI_INTMSK, chip->core->pci_irqmask | PCI_INT_AUDINT);
 169
 170         /* start dma */
 171         cx_set(MO_DEV_CNTRL2, (1<<5)); /* Enables Risc Processor */
 172         cx_set(MO_AUD_DMACNTRL, 0x11); /* audio downstream FIFO and RISC enable */
 173
 174         if (debug)
 175                 cx88_sram_channel_dump(chip->core, audio_ch);
 176
 177         return 0;
 178 }
 179
 180 /*
 181  * BOARD Specific: Resets audio DMA
 182  */
 183 static int _cx88_stop_audio_dma(snd_cx88_card_t *chip)
 184 {
 185         struct cx88_core *core=chip->core;
 186         dprintk(1, "Stopping audio DMA\n");
 187
 188         /* stop dma */
 189         cx_clear(MO_AUD_DMACNTRL, 0x11);
 190
 191         /* disable irqs */
 192         cx_clear(MO_PCI_INTMSK, PCI_INT_AUDINT);
 193         cx_clear(MO_AUD_INTMSK, AUD_INT_OPC_ERR | AUD_INT_DN_SYNC |
 194                                 AUD_INT_DN_RISCI2 | AUD_INT_DN_RISCI1);
 195
 196         if (debug)
 197                 cx88_sram_channel_dump(chip->core, &cx88_sram_channels[SRAM_CH25]);
 198
 199         return 0;
 200 }
 201
 202 #define MAX_IRQ_LOOP 50
 203
 204 /*
 205  * BOARD Specific: IRQ dma bits
 206  */
 207 static const char *cx88_aud_irqs[32] = {
 208         "dn_risci1", "up_risci1", "rds_dn_risc1", /* 0-2 */
 209         NULL,                                     /* reserved */
 210         "dn_risci2", "up_risci2", "rds_dn_risc2", /* 4-6 */
 211         NULL,                                     /* reserved */
 212         "dnf_of", "upf_uf", "rds_dnf_uf",         /* 8-10 */
 213         NULL,                                     /* reserved */
 214         "dn_sync", "up_sync", "rds_dn_sync",      /* 12-14 */
 215         NULL,                                     /* reserved */
 216         "opc_err", "par_err", "rip_err",          /* 16-18 */
 217         "pci_abort", "ber_irq", "mchg_irq"        /* 19-21 */
 218 };
 219
 220 /*
 221  * BOARD Specific: Threats IRQ audio specific calls
 222  */
 223 static void cx8801_aud_irq(snd_cx88_card_t *chip)
 224 {
 225         struct cx88_core *core = chip->core;
 226         u32 status, mask;
 227
 228         status = cx_read(MO_AUD_INTSTAT);
 229         mask   = cx_read(MO_AUD_INTMSK);
 230         if (0 == (status & mask))
 231                 return;
 232         cx_write(MO_AUD_INTSTAT, status);
 233         if (debug > 1  ||  (status & mask & ~0xff))
 234                 cx88_print_irqbits(core->name, "irq aud",
 235                                    cx88_aud_irqs, ARRAY_SIZE(cx88_aud_irqs),
 236                                    status, mask);
 237         /* risc op code error */
 238         if (status & AUD_INT_OPC_ERR) {
 239                 printk(KERN_WARNING "%s/1: Audio risc op code error\n",core->name);
 240                 cx_clear(MO_AUD_DMACNTRL, 0x11);
 241                 cx88_sram_channel_dump(core, &cx88_sram_channels[SRAM_CH25]);
 242         }
 243         if (status & AUD_INT_DN_SYNC) {
 244                 dprintk(1, "Downstream sync error\n");
 245                 cx_write(MO_AUDD_GPCNTRL, GP_COUNT_CONTROL_RESET);
 246                 return;
 247         }
 248         /* risc1 downstream */
 249         if (status & AUD_INT_DN_RISCI1) {
 250                 atomic_set(&chip->count, cx_read(MO_AUDD_GPCNT));
 251                 snd_pcm_period_elapsed(chip->substream);
 252         }
 253         /* FIXME: Any other status should deserve a special handling? */
 254 }
 255
 256 /*
 257  * BOARD Specific: Handles IRQ calls
 258  */
 259 static irqreturn_t cx8801_irq(int irq, void *dev_id)
 260 {
 261         snd_cx88_card_t *chip = dev_id;
 262         struct cx88_core *core = chip->core;
 263         u32 status;
 264         int loop, handled = 0;
 265
 266         for (loop = 0; loop < MAX_IRQ_LOOP; loop++) {
 267                 status = cx_read(MO_PCI_INTSTAT) &
 268                         (core->pci_irqmask | PCI_INT_AUDINT);
 269                 if (0 == status)
 270                         goto out;
 271                 dprintk(3, "cx8801_irq loop %d/%d, status %x\n",
 272                         loop, MAX_IRQ_LOOP, status);
 273                 handled = 1;
 274                 cx_write(MO_PCI_INTSTAT, status);
 275
 276                 if (status & core->pci_irqmask)
 277                         cx88_core_irq(core, status);
 278                 if (status & PCI_INT_AUDINT)
 279                         cx8801_aud_irq(chip);
 280         }
 281
 282         if (MAX_IRQ_LOOP == loop) {
 283                 printk(KERN_ERR
 284                        "%s/1: IRQ loop detected, disabling interrupts\n",
 285                        core->name);
 286                 cx_clear(MO_PCI_INTMSK, PCI_INT_AUDINT);
 287         }
 288
 289  out:
 290         return IRQ_RETVAL(handled);
 291 }
 292
 293
 294 static int dsp_buffer_free(snd_cx88_card_t *chip)
 295 {
 296         BUG_ON(!chip->dma_size);
 297
 298         dprintk(2,"Freeing buffer\n");
 299         videobuf_dma_unmap(&chip->pci->dev, chip->dma_risc);
 300         videobuf_dma_free(chip->dma_risc);
 301         btcx_riscmem_free(chip->pci,&chip->buf->risc);
 302         kfree(chip->buf);
 303
 304         chip->dma_risc = NULL;
 305         chip->dma_size = 0;
 306
 307         return 0;
 308 }
 309
 310 /****************************************************************************
 311                                 ALSA PCM Interface
 312  ****************************************************************************/
 313
 314 /*
 315  * Digital hardware definition
 316  */
 317 #define DEFAULT_FIFO_SIZE       4096
 318 static const struct snd_pcm_hardware snd_cx88_digital_hw = {
 319         .info = SNDRV_PCM_INFO_MMAP |
 320                 SNDRV_PCM_INFO_INTERLEAVED |
 321                 SNDRV_PCM_INFO_BLOCK_TRANSFER |
 322                 SNDRV_PCM_INFO_MMAP_VALID,
 323         .formats = SNDRV_PCM_FMTBIT_S16_LE,
 324
 325         .rates =                SNDRV_PCM_RATE_48000,
 326         .rate_min =             48000,
 327         .rate_max =             48000,
 328         .channels_min = 2,
 329         .channels_max = 2,
 330         /* Analog audio output will be full of clicks and pops if there
 331            are not exactly four lines in the SRAM FIFO buffer.  */
 332         .period_bytes_min = DEFAULT_FIFO_SIZE/4,
 333         .period_bytes_max = DEFAULT_FIFO_SIZE/4,
 334         .periods_min = 1,
 335         .periods_max = 1024,
 336         .buffer_bytes_max = (1024*1024),
 337 };
 338
 339 /*
 340  * audio pcm capture open callback
 341  */
 342 static int snd_cx88_pcm_open(struct snd_pcm_substream *substream)
 343 {
 344         snd_cx88_card_t *chip = snd_pcm_substream_chip(substream);
 345         struct snd_pcm_runtime *runtime = substream->runtime;
 346         int err;
 347
 348         if (!chip) {
 349                 printk(KERN_ERR "BUG: cx88 can't find device struct."
 350                                 " Can't proceed with open\n");
 351                 return -ENODEV;
 352         }
 353
 354         err = snd_pcm_hw_constraint_pow2(runtime, 0, SNDRV_PCM_HW_PARAM_PERIODS);
 355         if (err < 0)
 356                 goto _error;
 357
 358         chip->substream = substream;
 359
 360         runtime->hw = snd_cx88_digital_hw;
 361
 362         if (cx88_sram_channels[SRAM_CH25].fifo_size != DEFAULT_FIFO_SIZE) {
 363                 unsigned int bpl = cx88_sram_channels[SRAM_CH25].fifo_size / 4;
 364                 bpl &= ~7; /* must be multiple of 8 */
 365                 runtime->hw.period_bytes_min = bpl;
 366                 runtime->hw.period_bytes_max = bpl;
 367         }
 368
 369         return 0;
 370 _error:
 371         dprintk(1,"Error opening PCM!\n");
 372         return err;
 373 }
 374
 375 /*
 376  * audio close callback
 377  */
 378 static int snd_cx88_close(struct snd_pcm_substream *substream)
 379 {
 380         return 0;
 381 }
 382
 383 /*
 384  * hw_params callback
 385  */
 386 static int snd_cx88_hw_params(struct snd_pcm_substream * substream,
 387                               struct snd_pcm_hw_params * hw_params)
 388 {
 389         snd_cx88_card_t *chip = snd_pcm_substream_chip(substream);
 390         struct videobuf_dmabuf *dma;
 391
 392         struct cx88_audio_buffer *buf;
 393         int ret;
 394
 395         if (substream->runtime->dma_area) {
 396                 dsp_buffer_free(chip);
 397                 substream->runtime->dma_area = NULL;
 398         }
 399
 400         chip->period_size = params_period_bytes(hw_params);
 401         chip->num_periods = params_periods(hw_params);
 402         chip->dma_size = chip->period_size * params_periods(hw_params);
 403
 404         BUG_ON(!chip->dma_size);
 405         BUG_ON(chip->num_periods & (chip->num_periods-1));
 406
 407         buf = kzalloc(sizeof(*buf), GFP_KERNEL);
 408         if (NULL == buf)
 409                 return -ENOMEM;
 410
 411         buf->bpl = chip->period_size;
 412
 413         dma = &buf->dma;
 414         videobuf_dma_init(dma);
 415         ret = videobuf_dma_init_kernel(dma, PCI_DMA_FROMDEVICE,
 416                         (PAGE_ALIGN(chip->dma_size) >> PAGE_SHIFT));
 417         if (ret < 0)
 418                 goto error;
 419
 420         ret = videobuf_dma_map(&chip->pci->dev, dma);
 421         if (ret < 0)
 422                 goto error;
 423
 424         ret = cx88_risc_databuffer(chip->pci, &buf->risc, dma->sglist,
 425                                    chip->period_size, chip->num_periods, 1);
 426         if (ret < 0)
 427                 goto error;
 428
 429         /* Loop back to start of program */
 430         buf->risc.jmp[0] = cpu_to_le32(RISC_JUMP|RISC_IRQ1|RISC_CNT_INC);
 431         buf->risc.jmp[1] = cpu_to_le32(buf->risc.dma);
 432
 433         chip->buf = buf;
 434         chip->dma_risc = dma;
 435
 436         substream->runtime->dma_area = chip->dma_risc->vaddr;
 437         substream->runtime->dma_bytes = chip->dma_size;
 438         substream->runtime->dma_addr = 0;
 439         return 0;
 440
 441 error:
 442         kfree(buf);
 443         return ret;
 444 }
 445
 446 /*
 447  * hw free callback
 448  */
 449 static int snd_cx88_hw_free(struct snd_pcm_substream * substream)
 450 {
 451
 452         snd_cx88_card_t *chip = snd_pcm_substream_chip(substream);
 453
 454         if (substream->runtime->dma_area) {
 455                 dsp_buffer_free(chip);
 456                 substream->runtime->dma_area = NULL;
 457         }
 458
 459         return 0;
 460 }
 461
 462 /*
 463  * prepare callback
 464  */
 465 static int snd_cx88_prepare(struct snd_pcm_substream *substream)
 466 {
 467         return 0;
 468 }
 469
 470 /*
 471  * trigger callback
 472  */
 473 static int snd_cx88_card_trigger(struct snd_pcm_substream *substream, int cmd)
 474 {
 475         snd_cx88_card_t *chip = snd_pcm_substream_chip(substream);
 476         int err;
 477
 478         /* Local interrupts are already disabled by ALSA */
 479         spin_lock(&chip->reg_lock);
 480
 481         switch (cmd) {
 482         case SNDRV_PCM_TRIGGER_START:
 483                 err=_cx88_start_audio_dma(chip);
 484                 break;
 485         case SNDRV_PCM_TRIGGER_STOP:
 486                 err=_cx88_stop_audio_dma(chip);
 487                 break;
 488         default:
 489                 err=-EINVAL;
 490                 break;
 491         }
 492
 493         spin_unlock(&chip->reg_lock);
 494
 495         return err;
 496 }
 497
 498 /*
 499  * pointer callback
 500  */
 501 static snd_pcm_uframes_t snd_cx88_pointer(struct snd_pcm_substream *substream)
 502 {
 503         snd_cx88_card_t *chip = snd_pcm_substream_chip(substream);
 504         struct snd_pcm_runtime *runtime = substream->runtime;
 505         u16 count;
 506
 507         count = atomic_read(&chip->count);
 508
 509 //      dprintk(2, "%s - count %d (+%u), period %d, frame %lu\n", __func__,
 510 //              count, new, count & (runtime->periods-1),
 511 //              runtime->period_size * (count & (runtime->periods-1)));
 512         return runtime->period_size * (count & (runtime->periods-1));
 513 }
 514
 515 /*
 516  * page callback (needed for mmap)
 517  */
 518 static struct page *snd_cx88_page(struct snd_pcm_substream *substream,
 519                                 unsigned long offset)
 520 {
 521         void *pageptr = substream->runtime->dma_area + offset;
 522         return vmalloc_to_page(pageptr);
 523 }
 524
 525 /*
 526  * operators
 527  */
 528 static struct snd_pcm_ops snd_cx88_pcm_ops = {
 529         .open = snd_cx88_pcm_open,
 530         .close = snd_cx88_close,
 531         .ioctl = snd_pcm_lib_ioctl,
 532         .hw_params = snd_cx88_hw_params,
 533         .hw_free = snd_cx88_hw_free,
 534         .prepare = snd_cx88_prepare,
 535         .trigger = snd_cx88_card_trigger,
 536         .pointer = snd_cx88_pointer,
 537         .page = snd_cx88_page,
 538 };
 539
 540 /*
 541  * create a PCM device
 542  */
 543 static int snd_cx88_pcm(snd_cx88_card_t *chip, int device, const char *name)
 544 {
 545         int err;
 546         struct snd_pcm *pcm;
 547
 548         err = snd_pcm_new(chip->card, name, device, 0, 1, &pcm);
 549         if (err < 0)
 550                 return err;
 551         pcm->private_data = chip;
 552         strcpy(pcm->name, name);
 553         snd_pcm_set_ops(pcm, SNDRV_PCM_STREAM_CAPTURE, &snd_cx88_pcm_ops);
 554
 555         return 0;
 556 }
 557
 558 /****************************************************************************
 559                                 CONTROL INTERFACE
 560  ****************************************************************************/
 561 static int snd_cx88_volume_info(struct snd_kcontrol *kcontrol,
 562                                 struct snd_ctl_elem_info *info)
 563 {
 564         info->type = SNDRV_CTL_ELEM_TYPE_INTEGER;
 565         info->count = 2;
 566         info->value.integer.min = 0;
 567         info->value.integer.max = 0x3f;
 568
 569         return 0;
 570 }
 571
 572 static int snd_cx88_volume_get(struct snd_kcontrol *kcontrol,
 573                                struct snd_ctl_elem_value *value)
 574 {
 575         snd_cx88_card_t *chip = snd_kcontrol_chip(kcontrol);
 576         struct cx88_core *core=chip->core;
 577         int vol = 0x3f - (cx_read(AUD_VOL_CTL) & 0x3f),
 578             bal = cx_read(AUD_BAL_CTL);
 579
 580         value->value.integer.value[(bal & 0x40) ? 0 : 1] = vol;
 581         vol -= (bal & 0x3f);
 582         value->value.integer.value[(bal & 0x40) ? 1 : 0] = vol < 0 ? 0 : vol;
 583
 584         return 0;
 585 }
 586
 587 static void snd_cx88_wm8775_volume_put(struct snd_kcontrol *kcontrol,
 588                                struct snd_ctl_elem_value *value)
 589 {
 590         snd_cx88_card_t *chip = snd_kcontrol_chip(kcontrol);
 591         struct cx88_core *core = chip->core;
 592         int left = value->value.integer.value[0];
 593         int right = value->value.integer.value[1];
 594         int v, b;
 595
 596         /* Pass volume & balance onto any WM8775 */
 597         if (left >= right) {
 598                 v = left << 10;
 599                 b = left ? (0x8000 * right) / left : 0x8000;
 600         } else {
 601                 v = right << 10;
 602                 b = right ? 0xffff - (0x8000 * left) / right : 0x8000;
 603         }
 604         wm8775_s_ctrl(core, V4L2_CID_AUDIO_VOLUME, v);
 605         wm8775_s_ctrl(core, V4L2_CID_AUDIO_BALANCE, b);
 606 }
 607
 608 /* OK - TODO: test it */
 609 static int snd_cx88_volume_put(struct snd_kcontrol *kcontrol,
 610                                struct snd_ctl_elem_value *value)
 611 {
 612         snd_cx88_card_t *chip = snd_kcontrol_chip(kcontrol);
 613         struct cx88_core *core=chip->core;
 614         int left, right, v, b;
 615         int changed = 0;
 616         u32 old;
 617
 618         if (core->board.audio_chip == V4L2_IDENT_WM8775)
 619                 snd_cx88_wm8775_volume_put(kcontrol, value);
 620
 621         left = value->value.integer.value[0] & 0x3f;
 622         right = value->value.integer.value[1] & 0x3f;
 623         b = right - left;
 624         if (b < 0) {
 625                 v = 0x3f - left;
 626                 b = (-b) | 0x40;
 627         } else {
 628                 v = 0x3f - right;
 629         }
 630         /* Do we really know this will always be called with IRQs on? */
 631         spin_lock_irq(&chip->reg_lock);
 632         old = cx_read(AUD_VOL_CTL);
 633         if (v != (old & 0x3f)) {
 634                 cx_swrite(SHADOW_AUD_VOL_CTL, AUD_VOL_CTL, (old & ~0x3f) | v);
 635                 changed = 1;
 636         }
 637         if ((cx_read(AUD_BAL_CTL) & 0x7f) != b) {
 638                 cx_write(AUD_BAL_CTL, b);
 639                 changed = 1;
 640         }
 641         spin_unlock_irq(&chip->reg_lock);
 642
 643         return changed;
 644 }
 645
 646 static const DECLARE_TLV_DB_SCALE(snd_cx88_db_scale, -6300, 100, 0);
 647
 648 static const struct snd_kcontrol_new snd_cx88_volume = {
 649         .iface = SNDRV_CTL_ELEM_IFACE_MIXER,
 650         .access = SNDRV_CTL_ELEM_ACCESS_READWRITE |
 651                   SNDRV_CTL_ELEM_ACCESS_TLV_READ,
 652         .name = "Analog-TV Volume",
 653         .info = snd_cx88_volume_info,
 654         .get = snd_cx88_volume_get,
 655         .put = snd_cx88_volume_put,
 656         .tlv.p = snd_cx88_db_scale,
 657 };
 658
 659 static int snd_cx88_switch_get(struct snd_kcontrol *kcontrol,
 660                                struct snd_ctl_elem_value *value)
 661 {
 662         snd_cx88_card_t *chip = snd_kcontrol_chip(kcontrol);
 663         struct cx88_core *core = chip->core;
 664         u32 bit = kcontrol->private_value;
 665
 666         value->value.integer.value[0] = !(cx_read(AUD_VOL_CTL) & bit);
 667         return 0;
 668 }
 669
 670 static int snd_cx88_switch_put(struct snd_kcontrol *kcontrol,
 671                                        struct snd_ctl_elem_value *value)
 672 {
 673         snd_cx88_card_t *chip = snd_kcontrol_chip(kcontrol);
 674         struct cx88_core *core = chip->core;
 675         u32 bit = kcontrol->private_value;
 676         int ret = 0;
 677         u32 vol;
 678
 679         spin_lock_irq(&chip->reg_lock);
 680         vol = cx_read(AUD_VOL_CTL);
 681         if (value->value.integer.value[0] != !(vol & bit)) {
 682                 vol ^= bit;
 683                 cx_swrite(SHADOW_AUD_VOL_CTL, AUD_VOL_CTL, vol);
 684                 /* Pass mute onto any WM8775 */
 685                 if ((core->board.audio_chip == V4L2_IDENT_WM8775) &&
 686                     ((1<<6) == bit))
 687                         wm8775_s_ctrl(core, V4L2_CID_AUDIO_MUTE, 0 != (vol & bit));
 688                 ret = 1;
 689         }
 690         spin_unlock_irq(&chip->reg_lock);
 691         return ret;
 692 }
 693
 694 static const struct snd_kcontrol_new snd_cx88_dac_switch = {
 695         .iface = SNDRV_CTL_ELEM_IFACE_MIXER,
 696         .name = "Audio-Out Switch",
 697         .info = snd_ctl_boolean_mono_info,
 698         .get = snd_cx88_switch_get,
 699         .put = snd_cx88_switch_put,
 700         .private_value = (1<<8),
 701 };
 702
 703 static const struct snd_kcontrol_new snd_cx88_source_switch = {
 704         .iface = SNDRV_CTL_ELEM_IFACE_MIXER,
 705         .name = "Analog-TV Switch",
 706         .info = snd_ctl_boolean_mono_info,
 707         .get = snd_cx88_switch_get,
 708         .put = snd_cx88_switch_put,
 709         .private_value = (1<<6),
 710 };
 711
 712 static int snd_cx88_alc_get(struct snd_kcontrol *kcontrol,
 713                                struct snd_ctl_elem_value *value)
 714 {
 715         snd_cx88_card_t *chip = snd_kcontrol_chip(kcontrol);
 716         struct cx88_core *core = chip->core;
 717         s32 val;
 718
 719         val = wm8775_g_ctrl(core, V4L2_CID_AUDIO_LOUDNESS);
 720         value->value.integer.value[0] = val ? 1 : 0;
 721         return 0;
 722 }
 723
 724 static int snd_cx88_alc_put(struct snd_kcontrol *kcontrol,
 725                                        struct snd_ctl_elem_value *value)
 726 {
 727         snd_cx88_card_t *chip = snd_kcontrol_chip(kcontrol);
 728         struct cx88_core *core = chip->core;
 729         struct v4l2_control client_ctl;
 730
 731         memset(&client_ctl, 0, sizeof(client_ctl));
 732         client_ctl.value = 0 != value->value.integer.value[0];
 733         client_ctl.id = V4L2_CID_AUDIO_LOUDNESS;
 734         call_hw(core, WM8775_GID, core, s_ctrl, &client_ctl);
 735
 736         return 0;
 737 }
 738
 739 static struct snd_kcontrol_new snd_cx88_alc_switch = {
 740         .iface = SNDRV_CTL_ELEM_IFACE_MIXER,
 741         .name = "Line-In ALC Switch",
 742         .info = snd_ctl_boolean_mono_info,
 743         .get = snd_cx88_alc_get,
 744         .put = snd_cx88_alc_put,
 745 };
 746
 747 /****************************************************************************
 748                         Basic Flow for Sound Devices
 749  ****************************************************************************/
 750
 751 /*
 752  * PCI ID Table - 14f1:8801 and 14f1:8811 means function 1: Audio
 753  * Only boards with eeprom and byte 1 at eeprom=1 have it
 754  */
 755
 756 static const struct pci_device_id cx88_audio_pci_tbl[] = {
 757         {0x14f1,0x8801,PCI_ANY_ID,PCI_ANY_ID,0,0,0},
 758         {0x14f1,0x8811,PCI_ANY_ID,PCI_ANY_ID,0,0,0},
 759         {0, }
 760 };
 761 MODULE_DEVICE_TABLE(pci, cx88_audio_pci_tbl);
 762
 763 /*
 764  * Chip-specific destructor
 765  */
 766
 767 static int snd_cx88_free(snd_cx88_card_t *chip)
 768 {
 769
 770         if (chip->irq >= 0)
 771                 free_irq(chip->irq, chip);
 772
 773         cx88_core_put(chip->core,chip->pci);
 774
 775         pci_disable_device(chip->pci);
 776         return 0;
 777 }
 778
 779 /*
 780  * Component Destructor
 781  */
 782 static void snd_cx88_dev_free(struct snd_card * card)
 783 {
 784         snd_cx88_card_t *chip = card->private_data;
 785
 786         snd_cx88_free(chip);
 787 }
 788
 789
 790 /*
 791  * Alsa Constructor - Component probe
 792  */
 793
 794 static int devno;
 795 static int snd_cx88_create(struct snd_card *card, struct pci_dev *pci,
 796                            snd_cx88_card_t **rchip,
 797                            struct cx88_core **core_ptr)
 798 {
 799         snd_cx88_card_t   *chip;
 800         struct cx88_core  *core;
 801         int               err;
 802         unsigned char     pci_lat;
 803
 804         *rchip = NULL;
 805
 806         err = pci_enable_device(pci);
 807         if (err < 0)
 808                 return err;
 809
 810         pci_set_master(pci);
 811
 812         chip = card->private_data;
 813
 814         core = cx88_core_get(pci);
 815         if (NULL == core) {
 816                 err = -EINVAL;
 817                 return err;
 818         }
 819
 820         if (!pci_dma_supported(pci,DMA_BIT_MASK(32))) {
 821                 dprintk(0, "%s/1: Oops: no 32bit PCI DMA ???\n",core->name);
 822                 err = -EIO;
 823                 cx88_core_put(core, pci);
 824                 return err;
 825         }
 826
 827
 828         /* pci init */
 829         chip->card = card;
 830         chip->pci = pci;
 831         chip->irq = -1;
 832         spin_lock_init(&chip->reg_lock);
 833
 834         chip->core = core;
 835
 836         /* get irq */
 837         err = request_irq(chip->pci->irq, cx8801_irq,
 838                           IRQF_SHARED | IRQF_DISABLED, chip->core->name, chip);
 839         if (err < 0) {
 840                 dprintk(0, "%s: can't get IRQ %d\n",
 841                        chip->core->name, chip->pci->irq);
 842                 return err;
 843         }
 844
 845         /* print pci info */
 846         pci_read_config_byte(pci, PCI_LATENCY_TIMER, &pci_lat);
 847
 848         dprintk(1,"ALSA %s/%i: found at %s, rev: %d, irq: %d, "
 849                "latency: %d, mmio: 0x%llx\n", core->name, devno,
 850                pci_name(pci), pci->revision, pci->irq,
 851                pci_lat, (unsigned long long)pci_resource_start(pci,0));
 852
 853         chip->irq = pci->irq;
 854         synchronize_irq(chip->irq);
 855
 856         snd_card_set_dev(card, &pci->dev);
 857
 858         *rchip = chip;
 859         *core_ptr = core;
 860
 861         return 0;
 862 }
 863
 864 static int cx88_audio_initdev(struct pci_dev *pci,
 865                               const struct pci_device_id *pci_id)
 866 {
 867         struct snd_card  *card;
 868         snd_cx88_card_t  *chip;
 869         struct cx88_core *core = NULL;
 870         int              err;
 871
 872         if (devno >= SNDRV_CARDS)
 873                 return (-ENODEV);
 874
 875         if (!enable[devno]) {
 876                 ++devno;
 877                 return (-ENOENT);
 878         }
 879
 880         err = snd_card_create(index[devno], id[devno], THIS_MODULE,
 881                               sizeof(snd_cx88_card_t), &card);
 882         if (err < 0)
 883                 return err;
 884
 885         card->private_free = snd_cx88_dev_free;
 886
 887         err = snd_cx88_create(card, pci, &chip, &core);
 888         if (err < 0)
 889                 goto error;
 890
 891         err = snd_cx88_pcm(chip, 0, "CX88 Digital");
 892         if (err < 0)
 893                 goto error;
 894
 895         err = snd_ctl_add(card, snd_ctl_new1(&snd_cx88_volume, chip));
 896         if (err < 0)
 897                 goto error;
 898         err = snd_ctl_add(card, snd_ctl_new1(&snd_cx88_dac_switch, chip));
 899         if (err < 0)
 900                 goto error;
 901         err = snd_ctl_add(card, snd_ctl_new1(&snd_cx88_source_switch, chip));
 902         if (err < 0)
 903                 goto error;
 904
 905         /* If there's a wm8775 then add a Line-In ALC switch */
 906         if (core->board.audio_chip == V4L2_IDENT_WM8775)
 907                 snd_ctl_add(card, snd_ctl_new1(&snd_cx88_alc_switch, chip));
 908
 909         strcpy (card->driver, "CX88x");
 910         sprintf(card->shortname, "Conexant CX%x", pci->device);
 911         sprintf(card->longname, "%s at %#llx",
 912                 card->shortname,(unsigned long long)pci_resource_start(pci, 0));
 913         strcpy (card->mixername, "CX88");
 914
 915         dprintk (0, "%s/%i: ALSA support for cx2388x boards\n",
 916                card->driver,devno);
 917
 918         err = snd_card_register(card);
 919         if (err < 0)
 920                 goto error;
 921         pci_set_drvdata(pci,card);
 922
 923         devno++;
 924         return 0;
 925
 926 error:
 927         snd_card_free(card);
 928         return err;
 929 }
 930 /*
 931  * ALSA destructor
 932  */
 933 static void cx88_audio_finidev(struct pci_dev *pci)
 934 {
 935         struct cx88_audio_dev *card = pci_get_drvdata(pci);
 936
 937         snd_card_free((void *)card);
 938
 939         pci_set_drvdata(pci, NULL);
 940
 941         devno--;
 942 }
 943
 944 /*
 945  * PCI driver definition
 946  */
 947
 948 static struct pci_driver cx88_audio_pci_driver = {
 949         .name     = "cx88_audio",
 950         .id_table = cx88_audio_pci_tbl,
 951         .probe    = cx88_audio_initdev,
 952         .remove   = cx88_audio_finidev,
 953 };
 954
 955 /****************************************************************************
 956                                 LINUX MODULE INIT
 957  ****************************************************************************/
 958
 959 /*
 960  * module init
 961  */
 962 static int __init cx88_audio_init(void)
 963 {
 964         printk(KERN_INFO "cx2388x alsa driver version %s loaded\n",
 965                CX88_VERSION);
 966         return pci_register_driver(&cx88_audio_pci_driver);
 967 }
 968
 969 /*
 970  * module remove
 971  */
 972 static void __exit cx88_audio_fini(void)
 973 {
 974         pci_unregister_driver(&cx88_audio_pci_driver);
 975 }
 976
 977 module_init(cx88_audio_init);
 978 module_exit(cx88_audio_fini);