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

   1 // SPDX-License-Identifier: GPL-2.0-or-later
   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@kernel.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
  13 #include "cx88.h"
  14 #include "cx88-reg.h"
  15
  16 #include <linux/module.h>
  17 #include <linux/init.h>
  18 #include <linux/delay.h>
  19 #include <linux/device.h>
  20 #include <linux/interrupt.h>
  21 #include <linux/vmalloc.h>
  22 #include <linux/dma-mapping.h>
  23 #include <linux/pci.h>
  24 #include <linux/slab.h>
  25
  26 #include <sound/core.h>
  27 #include <sound/pcm.h>
  28 #include <sound/pcm_params.h>
  29 #include <sound/control.h>
  30 #include <sound/initval.h>
  31 #include <sound/tlv.h>
  32 #include <media/i2c/wm8775.h>
  33
  34 #define dprintk(level, fmt, arg...) do {                                \
  35         if (debug + 1 > level)                                          \
  36                 printk(KERN_DEBUG pr_fmt("%s: alsa: " fmt),             \
  37                         chip->core->name, ##arg);                       \
  38 } while (0)
  39
  40 /*
  41  * Data type declarations - Can be moded to a header file later
  42  */
  43
  44 struct cx88_audio_buffer {
  45         unsigned int            bpl;
  46         struct cx88_riscmem     risc;
  47         void                    *vaddr;
  48         struct scatterlist      *sglist;
  49         int                     sglen;
  50         unsigned long           nr_pages;
  51 };
  52
  53 struct cx88_audio_dev {
  54         struct cx88_core           *core;
  55         struct cx88_dmaqueue       q;
  56
  57         /* pci i/o */
  58         struct pci_dev             *pci;
  59
  60         /* audio controls */
  61         int                        irq;
  62
  63         struct snd_card            *card;
  64
  65         spinlock_t                 reg_lock;
  66         atomic_t                   count;
  67
  68         unsigned int               dma_size;
  69         unsigned int               period_size;
  70         unsigned int               num_periods;
  71
  72         struct cx88_audio_buffer   *buf;
  73
  74         struct snd_pcm_substream   *substream;
  75 };
  76
  77 /*
  78  * Module global static vars
  79  */
  80
  81 static int index[SNDRV_CARDS] = SNDRV_DEFAULT_IDX;      /* Index 0-MAX */
  82 static const char *id[SNDRV_CARDS] = SNDRV_DEFAULT_STR; /* ID for this card */
  83 static bool enable[SNDRV_CARDS] = SNDRV_DEFAULT_ENABLE_PNP;
  84
  85 module_param_array(enable, bool, NULL, 0444);
  86 MODULE_PARM_DESC(enable, "Enable cx88x soundcard. default enabled.");
  87
  88 module_param_array(index, int, NULL, 0444);
  89 MODULE_PARM_DESC(index, "Index value for cx88x capture interface(s).");
  90
  91 /*
  92  * Module macros
  93  */
  94
  95 MODULE_DESCRIPTION("ALSA driver module for cx2388x based TV cards");
  96 MODULE_AUTHOR("Ricardo Cerqueira");
  97 MODULE_AUTHOR("Mauro Carvalho Chehab <mchehab@kernel.org>");
  98 MODULE_LICENSE("GPL v2");
  99 MODULE_VERSION(CX88_VERSION);
 100
 101 MODULE_SUPPORTED_DEVICE("{{Conexant,23881},{{Conexant,23882},{{Conexant,23883}");
 102 static unsigned int debug;
 103 module_param(debug, int, 0644);
 104 MODULE_PARM_DESC(debug, "enable debug messages");
 105
 106 /*
 107  * Module specific functions
 108  */
 109
 110 /*
 111  * BOARD Specific: Sets audio DMA
 112  */
 113
 114 static int _cx88_start_audio_dma(struct cx88_audio_dev *chip)
 115 {
 116         struct cx88_audio_buffer *buf = chip->buf;
 117         struct cx88_core *core = chip->core;
 118         const struct sram_channel *audio_ch = &cx88_sram_channels[SRAM_CH25];
 119
 120         /* Make sure RISC/FIFO are off before changing FIFO/RISC settings */
 121         cx_clear(MO_AUD_DMACNTRL, 0x11);
 122
 123         /* setup fifo + format - out channel */
 124         cx88_sram_channel_setup(chip->core, audio_ch, buf->bpl, buf->risc.dma);
 125
 126         /* sets bpl size */
 127         cx_write(MO_AUDD_LNGTH, buf->bpl);
 128
 129         /* reset counter */
 130         cx_write(MO_AUDD_GPCNTRL, GP_COUNT_CONTROL_RESET);
 131         atomic_set(&chip->count, 0);
 132
 133         dprintk(1,
 134                 "Start audio DMA, %d B/line, %d lines/FIFO, %d periods, %d byte buffer\n",
 135                 buf->bpl, cx_read(audio_ch->cmds_start + 8) >> 1,
 136                 chip->num_periods, buf->bpl * chip->num_periods);
 137
 138         /* Enables corresponding bits at AUD_INT_STAT */
 139         cx_write(MO_AUD_INTMSK, AUD_INT_OPC_ERR | AUD_INT_DN_SYNC |
 140                                 AUD_INT_DN_RISCI2 | AUD_INT_DN_RISCI1);
 141
 142         /* Clean any pending interrupt bits already set */
 143         cx_write(MO_AUD_INTSTAT, ~0);
 144
 145         /* enable audio irqs */
 146         cx_set(MO_PCI_INTMSK, chip->core->pci_irqmask | PCI_INT_AUDINT);
 147
 148         /* start dma */
 149
 150         /* Enables Risc Processor */
 151         cx_set(MO_DEV_CNTRL2, (1 << 5));
 152         /* audio downstream FIFO and RISC enable */
 153         cx_set(MO_AUD_DMACNTRL, 0x11);
 154
 155         if (debug)
 156                 cx88_sram_channel_dump(chip->core, audio_ch);
 157
 158         return 0;
 159 }
 160
 161 /*
 162  * BOARD Specific: Resets audio DMA
 163  */
 164 static int _cx88_stop_audio_dma(struct cx88_audio_dev *chip)
 165 {
 166         struct cx88_core *core = chip->core;
 167
 168         dprintk(1, "Stopping audio DMA\n");
 169
 170         /* stop dma */
 171         cx_clear(MO_AUD_DMACNTRL, 0x11);
 172
 173         /* disable irqs */
 174         cx_clear(MO_PCI_INTMSK, PCI_INT_AUDINT);
 175         cx_clear(MO_AUD_INTMSK, AUD_INT_OPC_ERR | AUD_INT_DN_SYNC |
 176                                 AUD_INT_DN_RISCI2 | AUD_INT_DN_RISCI1);
 177
 178         if (debug)
 179                 cx88_sram_channel_dump(chip->core,
 180                                        &cx88_sram_channels[SRAM_CH25]);
 181
 182         return 0;
 183 }
 184
 185 #define MAX_IRQ_LOOP 50
 186
 187 /*
 188  * BOARD Specific: IRQ dma bits
 189  */
 190 static const char *cx88_aud_irqs[32] = {
 191         "dn_risci1", "up_risci1", "rds_dn_risc1", /* 0-2 */
 192         NULL,                                     /* reserved */
 193         "dn_risci2", "up_risci2", "rds_dn_risc2", /* 4-6 */
 194         NULL,                                     /* reserved */
 195         "dnf_of", "upf_uf", "rds_dnf_uf",         /* 8-10 */
 196         NULL,                                     /* reserved */
 197         "dn_sync", "up_sync", "rds_dn_sync",      /* 12-14 */
 198         NULL,                                     /* reserved */
 199         "opc_err", "par_err", "rip_err",          /* 16-18 */
 200         "pci_abort", "ber_irq", "mchg_irq"        /* 19-21 */
 201 };
 202
 203 /*
 204  * BOARD Specific: Threats IRQ audio specific calls
 205  */
 206 static void cx8801_aud_irq(struct cx88_audio_dev *chip)
 207 {
 208         struct cx88_core *core = chip->core;
 209         u32 status, mask;
 210
 211         status = cx_read(MO_AUD_INTSTAT);
 212         mask   = cx_read(MO_AUD_INTMSK);
 213         if (0 == (status & mask))
 214                 return;
 215         cx_write(MO_AUD_INTSTAT, status);
 216         if (debug > 1  ||  (status & mask & ~0xff))
 217                 cx88_print_irqbits("irq aud",
 218                                    cx88_aud_irqs, ARRAY_SIZE(cx88_aud_irqs),
 219                                    status, mask);
 220         /* risc op code error */
 221         if (status & AUD_INT_OPC_ERR) {
 222                 pr_warn("Audio risc op code error\n");
 223                 cx_clear(MO_AUD_DMACNTRL, 0x11);
 224                 cx88_sram_channel_dump(core, &cx88_sram_channels[SRAM_CH25]);
 225         }
 226         if (status & AUD_INT_DN_SYNC) {
 227                 dprintk(1, "Downstream sync error\n");
 228                 cx_write(MO_AUDD_GPCNTRL, GP_COUNT_CONTROL_RESET);
 229                 return;
 230         }
 231         /* risc1 downstream */
 232         if (status & AUD_INT_DN_RISCI1) {
 233                 atomic_set(&chip->count, cx_read(MO_AUDD_GPCNT));
 234                 snd_pcm_period_elapsed(chip->substream);
 235         }
 236         /* FIXME: Any other status should deserve a special handling? */
 237 }
 238
 239 /*
 240  * BOARD Specific: Handles IRQ calls
 241  */
 242 static irqreturn_t cx8801_irq(int irq, void *dev_id)
 243 {
 244         struct cx88_audio_dev *chip = dev_id;
 245         struct cx88_core *core = chip->core;
 246         u32 status;
 247         int loop, handled = 0;
 248
 249         for (loop = 0; loop < MAX_IRQ_LOOP; loop++) {
 250                 status = cx_read(MO_PCI_INTSTAT) &
 251                         (core->pci_irqmask | PCI_INT_AUDINT);
 252                 if (status == 0)
 253                         goto out;
 254                 dprintk(3, "cx8801_irq loop %d/%d, status %x\n",
 255                         loop, MAX_IRQ_LOOP, status);
 256                 handled = 1;
 257                 cx_write(MO_PCI_INTSTAT, status);
 258
 259                 if (status & core->pci_irqmask)
 260                         cx88_core_irq(core, status);
 261                 if (status & PCI_INT_AUDINT)
 262                         cx8801_aud_irq(chip);
 263         }
 264
 265         if (loop == MAX_IRQ_LOOP) {
 266                 pr_err("IRQ loop detected, disabling interrupts\n");
 267                 cx_clear(MO_PCI_INTMSK, PCI_INT_AUDINT);
 268         }
 269
 270  out:
 271         return IRQ_RETVAL(handled);
 272 }
 273
 274 static int cx88_alsa_dma_init(struct cx88_audio_dev *chip,
 275                               unsigned long nr_pages)
 276 {
 277         struct cx88_audio_buffer *buf = chip->buf;
 278         struct page *pg;
 279         int i;
 280
 281         buf->vaddr = vmalloc_32(nr_pages << PAGE_SHIFT);
 282         if (!buf->vaddr) {
 283                 dprintk(1, "vmalloc_32(%lu pages) failed\n", nr_pages);
 284                 return -ENOMEM;
 285         }
 286
 287         dprintk(1, "vmalloc is at addr %p, size=%lu\n",
 288                 buf->vaddr, nr_pages << PAGE_SHIFT);
 289
 290         memset(buf->vaddr, 0, nr_pages << PAGE_SHIFT);
 291         buf->nr_pages = nr_pages;
 292
 293         buf->sglist = vzalloc(array_size(sizeof(*buf->sglist), buf->nr_pages));
 294         if (!buf->sglist)
 295                 goto vzalloc_err;
 296
 297         sg_init_table(buf->sglist, buf->nr_pages);
 298         for (i = 0; i < buf->nr_pages; i++) {
 299                 pg = vmalloc_to_page(buf->vaddr + i * PAGE_SIZE);
 300                 if (!pg)
 301                         goto vmalloc_to_page_err;
 302                 sg_set_page(&buf->sglist[i], pg, PAGE_SIZE, 0);
 303         }
 304         return 0;
 305
 306 vmalloc_to_page_err:
 307         vfree(buf->sglist);
 308         buf->sglist = NULL;
 309 vzalloc_err:
 310         vfree(buf->vaddr);
 311         buf->vaddr = NULL;
 312         return -ENOMEM;
 313 }
 314
 315 static int cx88_alsa_dma_map(struct cx88_audio_dev *dev)
 316 {
 317         struct cx88_audio_buffer *buf = dev->buf;
 318
 319         buf->sglen = dma_map_sg(&dev->pci->dev, buf->sglist,
 320                         buf->nr_pages, DMA_FROM_DEVICE);
 321
 322         if (buf->sglen == 0) {
 323                 pr_warn("%s: cx88_alsa_map_sg failed\n", __func__);
 324                 return -ENOMEM;
 325         }
 326         return 0;
 327 }
 328
 329 static int cx88_alsa_dma_unmap(struct cx88_audio_dev *dev)
 330 {
 331         struct cx88_audio_buffer *buf = dev->buf;
 332
 333         if (!buf->sglen)
 334                 return 0;
 335
 336         dma_unmap_sg(&dev->pci->dev, buf->sglist, buf->nr_pages,
 337                      DMA_FROM_DEVICE);
 338         buf->sglen = 0;
 339         return 0;
 340 }
 341
 342 static int cx88_alsa_dma_free(struct cx88_audio_buffer *buf)
 343 {
 344         vfree(buf->sglist);
 345         buf->sglist = NULL;
 346         vfree(buf->vaddr);
 347         buf->vaddr = NULL;
 348         return 0;
 349 }
 350
 351 static int dsp_buffer_free(struct cx88_audio_dev *chip)
 352 {
 353         struct cx88_riscmem *risc = &chip->buf->risc;
 354
 355         WARN_ON(!chip->dma_size);
 356
 357         dprintk(2, "Freeing buffer\n");
 358         cx88_alsa_dma_unmap(chip);
 359         cx88_alsa_dma_free(chip->buf);
 360         if (risc->cpu)
 361                 pci_free_consistent(chip->pci, risc->size,
 362                                     risc->cpu, risc->dma);
 363         kfree(chip->buf);
 364
 365         chip->buf = NULL;
 366
 367         return 0;
 368 }
 369
 370 /*
 371  * ALSA PCM Interface
 372  */
 373
 374 /*
 375  * Digital hardware definition
 376  */
 377 #define DEFAULT_FIFO_SIZE       4096
 378 static const struct snd_pcm_hardware snd_cx88_digital_hw = {
 379         .info = SNDRV_PCM_INFO_MMAP |
 380                 SNDRV_PCM_INFO_INTERLEAVED |
 381                 SNDRV_PCM_INFO_BLOCK_TRANSFER |
 382                 SNDRV_PCM_INFO_MMAP_VALID,
 383         .formats = SNDRV_PCM_FMTBIT_S16_LE,
 384
 385         .rates =                SNDRV_PCM_RATE_48000,
 386         .rate_min =             48000,
 387         .rate_max =             48000,
 388         .channels_min = 2,
 389         .channels_max = 2,
 390         /*
 391          * Analog audio output will be full of clicks and pops if there
 392          * are not exactly four lines in the SRAM FIFO buffer.
 393          */
 394         .period_bytes_min = DEFAULT_FIFO_SIZE / 4,
 395         .period_bytes_max = DEFAULT_FIFO_SIZE / 4,
 396         .periods_min = 1,
 397         .periods_max = 1024,
 398         .buffer_bytes_max = (1024 * 1024),
 399 };
 400
 401 /*
 402  * audio pcm capture open callback
 403  */
 404 static int snd_cx88_pcm_open(struct snd_pcm_substream *substream)
 405 {
 406         struct cx88_audio_dev *chip = snd_pcm_substream_chip(substream);
 407         struct snd_pcm_runtime *runtime = substream->runtime;
 408         int err;
 409
 410         if (!chip) {
 411                 pr_err("BUG: cx88 can't find device struct. Can't proceed with open\n");
 412                 return -ENODEV;
 413         }
 414
 415         err = snd_pcm_hw_constraint_pow2(runtime, 0,
 416                                          SNDRV_PCM_HW_PARAM_PERIODS);
 417         if (err < 0)
 418                 goto _error;
 419
 420         chip->substream = substream;
 421
 422         runtime->hw = snd_cx88_digital_hw;
 423
 424         if (cx88_sram_channels[SRAM_CH25].fifo_size != DEFAULT_FIFO_SIZE) {
 425                 unsigned int bpl = cx88_sram_channels[SRAM_CH25].fifo_size / 4;
 426
 427                 bpl &= ~7; /* must be multiple of 8 */
 428                 runtime->hw.period_bytes_min = bpl;
 429                 runtime->hw.period_bytes_max = bpl;
 430         }
 431
 432         return 0;
 433 _error:
 434         dprintk(1, "Error opening PCM!\n");
 435         return err;
 436 }
 437
 438 /*
 439  * audio close callback
 440  */
 441 static int snd_cx88_close(struct snd_pcm_substream *substream)
 442 {
 443         return 0;
 444 }
 445
 446 /*
 447  * hw_params callback
 448  */
 449 static int snd_cx88_hw_params(struct snd_pcm_substream *substream,
 450                               struct snd_pcm_hw_params *hw_params)
 451 {
 452         struct cx88_audio_dev *chip = snd_pcm_substream_chip(substream);
 453
 454         struct cx88_audio_buffer *buf;
 455         int ret;
 456
 457         if (substream->runtime->dma_area) {
 458                 dsp_buffer_free(chip);
 459                 substream->runtime->dma_area = NULL;
 460         }
 461
 462         chip->period_size = params_period_bytes(hw_params);
 463         chip->num_periods = params_periods(hw_params);
 464         chip->dma_size = chip->period_size * params_periods(hw_params);
 465
 466         WARN_ON(!chip->dma_size);
 467         WARN_ON(chip->num_periods & (chip->num_periods - 1));
 468
 469         buf = kzalloc(sizeof(*buf), GFP_KERNEL);
 470         if (!buf)
 471                 return -ENOMEM;
 472
 473         chip->buf = buf;
 474         buf->bpl = chip->period_size;
 475
 476         ret = cx88_alsa_dma_init(chip,
 477                                  (PAGE_ALIGN(chip->dma_size) >> PAGE_SHIFT));
 478         if (ret < 0)
 479                 goto error;
 480
 481         ret = cx88_alsa_dma_map(chip);
 482         if (ret < 0)
 483                 goto error;
 484
 485         ret = cx88_risc_databuffer(chip->pci, &buf->risc, buf->sglist,
 486                                    chip->period_size, chip->num_periods, 1);
 487         if (ret < 0)
 488                 goto error;
 489
 490         /* Loop back to start of program */
 491         buf->risc.jmp[0] = cpu_to_le32(RISC_JUMP | RISC_IRQ1 | RISC_CNT_INC);
 492         buf->risc.jmp[1] = cpu_to_le32(buf->risc.dma);
 493
 494         substream->runtime->dma_area = chip->buf->vaddr;
 495         substream->runtime->dma_bytes = chip->dma_size;
 496         substream->runtime->dma_addr = 0;
 497         return 0;
 498
 499 error:
 500         kfree(buf);
 501         return ret;
 502 }
 503
 504 /*
 505  * hw free callback
 506  */
 507 static int snd_cx88_hw_free(struct snd_pcm_substream *substream)
 508 {
 509         struct cx88_audio_dev *chip = snd_pcm_substream_chip(substream);
 510
 511         if (substream->runtime->dma_area) {
 512                 dsp_buffer_free(chip);
 513                 substream->runtime->dma_area = NULL;
 514         }
 515
 516         return 0;
 517 }
 518
 519 /*
 520  * prepare callback
 521  */
 522 static int snd_cx88_prepare(struct snd_pcm_substream *substream)
 523 {
 524         return 0;
 525 }
 526
 527 /*
 528  * trigger callback
 529  */
 530 static int snd_cx88_card_trigger(struct snd_pcm_substream *substream, int cmd)
 531 {
 532         struct cx88_audio_dev *chip = snd_pcm_substream_chip(substream);
 533         int err;
 534
 535         /* Local interrupts are already disabled by ALSA */
 536         spin_lock(&chip->reg_lock);
 537
 538         switch (cmd) {
 539         case SNDRV_PCM_TRIGGER_START:
 540                 err = _cx88_start_audio_dma(chip);
 541                 break;
 542         case SNDRV_PCM_TRIGGER_STOP:
 543                 err = _cx88_stop_audio_dma(chip);
 544                 break;
 545         default:
 546                 err =  -EINVAL;
 547                 break;
 548         }
 549
 550         spin_unlock(&chip->reg_lock);
 551
 552         return err;
 553 }
 554
 555 /*
 556  * pointer callback
 557  */
 558 static snd_pcm_uframes_t snd_cx88_pointer(struct snd_pcm_substream *substream)
 559 {
 560         struct cx88_audio_dev *chip = snd_pcm_substream_chip(substream);
 561         struct snd_pcm_runtime *runtime = substream->runtime;
 562         u16 count;
 563
 564         count = atomic_read(&chip->count);
 565
 566 //      dprintk(2, "%s - count %d (+%u), period %d, frame %lu\n", __func__,
 567 //              count, new, count & (runtime->periods-1),
 568 //              runtime->period_size * (count & (runtime->periods-1)));
 569         return runtime->period_size * (count & (runtime->periods - 1));
 570 }
 571
 572 /*
 573  * page callback (needed for mmap)
 574  */
 575 static struct page *snd_cx88_page(struct snd_pcm_substream *substream,
 576                                   unsigned long offset)
 577 {
 578         void *pageptr = substream->runtime->dma_area + offset;
 579
 580         return vmalloc_to_page(pageptr);
 581 }
 582
 583 /*
 584  * operators
 585  */
 586 static const struct snd_pcm_ops snd_cx88_pcm_ops = {
 587         .open = snd_cx88_pcm_open,
 588         .close = snd_cx88_close,
 589         .hw_params = snd_cx88_hw_params,
 590         .hw_free = snd_cx88_hw_free,
 591         .prepare = snd_cx88_prepare,
 592         .trigger = snd_cx88_card_trigger,
 593         .pointer = snd_cx88_pointer,
 594         .page = snd_cx88_page,
 595 };
 596
 597 /*
 598  * create a PCM device
 599  */
 600 static int snd_cx88_pcm(struct cx88_audio_dev *chip, int device,
 601                         const char *name)
 602 {
 603         int err;
 604         struct snd_pcm *pcm;
 605
 606         err = snd_pcm_new(chip->card, name, device, 0, 1, &pcm);
 607         if (err < 0)
 608                 return err;
 609         pcm->private_data = chip;
 610         strscpy(pcm->name, name, sizeof(pcm->name));
 611         snd_pcm_set_ops(pcm, SNDRV_PCM_STREAM_CAPTURE, &snd_cx88_pcm_ops);
 612
 613         return 0;
 614 }
 615
 616 /*
 617  * CONTROL INTERFACE
 618  */
 619 static int snd_cx88_volume_info(struct snd_kcontrol *kcontrol,
 620                                 struct snd_ctl_elem_info *info)
 621 {
 622         info->type = SNDRV_CTL_ELEM_TYPE_INTEGER;
 623         info->count = 2;
 624         info->value.integer.min = 0;
 625         info->value.integer.max = 0x3f;
 626
 627         return 0;
 628 }
 629
 630 static int snd_cx88_volume_get(struct snd_kcontrol *kcontrol,
 631                                struct snd_ctl_elem_value *value)
 632 {
 633         struct cx88_audio_dev *chip = snd_kcontrol_chip(kcontrol);
 634         struct cx88_core *core = chip->core;
 635         int vol = 0x3f - (cx_read(AUD_VOL_CTL) & 0x3f),
 636             bal = cx_read(AUD_BAL_CTL);
 637
 638         value->value.integer.value[(bal & 0x40) ? 0 : 1] = vol;
 639         vol -= (bal & 0x3f);
 640         value->value.integer.value[(bal & 0x40) ? 1 : 0] = vol < 0 ? 0 : vol;
 641
 642         return 0;
 643 }
 644
 645 static void snd_cx88_wm8775_volume_put(struct snd_kcontrol *kcontrol,
 646                                        struct snd_ctl_elem_value *value)
 647 {
 648         struct cx88_audio_dev *chip = snd_kcontrol_chip(kcontrol);
 649         struct cx88_core *core = chip->core;
 650         u16 left = value->value.integer.value[0];
 651         u16 right = value->value.integer.value[1];
 652         int v, b;
 653
 654         /* Pass volume & balance onto any WM8775 */
 655         if (left >= right) {
 656                 v = left << 10;
 657                 b = left ? (0x8000 * right) / left : 0x8000;
 658         } else {
 659                 v = right << 10;
 660                 b = right ? 0xffff - (0x8000 * left) / right : 0x8000;
 661         }
 662         wm8775_s_ctrl(core, V4L2_CID_AUDIO_VOLUME, v);
 663         wm8775_s_ctrl(core, V4L2_CID_AUDIO_BALANCE, b);
 664 }
 665
 666 /* OK - TODO: test it */
 667 static int snd_cx88_volume_put(struct snd_kcontrol *kcontrol,
 668                                struct snd_ctl_elem_value *value)
 669 {
 670         struct cx88_audio_dev *chip = snd_kcontrol_chip(kcontrol);
 671         struct cx88_core *core = chip->core;
 672         int left, right, v, b;
 673         int changed = 0;
 674         u32 old;
 675
 676         if (core->sd_wm8775)
 677                 snd_cx88_wm8775_volume_put(kcontrol, value);
 678
 679         left = value->value.integer.value[0] & 0x3f;
 680         right = value->value.integer.value[1] & 0x3f;
 681         b = right - left;
 682         if (b < 0) {
 683                 v = 0x3f - left;
 684                 b = (-b) | 0x40;
 685         } else {
 686                 v = 0x3f - right;
 687         }
 688         /* Do we really know this will always be called with IRQs on? */
 689         spin_lock_irq(&chip->reg_lock);
 690         old = cx_read(AUD_VOL_CTL);
 691         if (v != (old & 0x3f)) {
 692                 cx_swrite(SHADOW_AUD_VOL_CTL, AUD_VOL_CTL, (old & ~0x3f) | v);
 693                 changed = 1;
 694         }
 695         if ((cx_read(AUD_BAL_CTL) & 0x7f) != b) {
 696                 cx_write(AUD_BAL_CTL, b);
 697                 changed = 1;
 698         }
 699         spin_unlock_irq(&chip->reg_lock);
 700
 701         return changed;
 702 }
 703
 704 static const DECLARE_TLV_DB_SCALE(snd_cx88_db_scale, -6300, 100, 0);
 705
 706 static const struct snd_kcontrol_new snd_cx88_volume = {
 707         .iface = SNDRV_CTL_ELEM_IFACE_MIXER,
 708         .access = SNDRV_CTL_ELEM_ACCESS_READWRITE |
 709                   SNDRV_CTL_ELEM_ACCESS_TLV_READ,
 710         .name = "Analog-TV Volume",
 711         .info = snd_cx88_volume_info,
 712         .get = snd_cx88_volume_get,
 713         .put = snd_cx88_volume_put,
 714         .tlv.p = snd_cx88_db_scale,
 715 };
 716
 717 static int snd_cx88_switch_get(struct snd_kcontrol *kcontrol,
 718                                struct snd_ctl_elem_value *value)
 719 {
 720         struct cx88_audio_dev *chip = snd_kcontrol_chip(kcontrol);
 721         struct cx88_core *core = chip->core;
 722         u32 bit = kcontrol->private_value;
 723
 724         value->value.integer.value[0] = !(cx_read(AUD_VOL_CTL) & bit);
 725         return 0;
 726 }
 727
 728 static int snd_cx88_switch_put(struct snd_kcontrol *kcontrol,
 729                                struct snd_ctl_elem_value *value)
 730 {
 731         struct cx88_audio_dev *chip = snd_kcontrol_chip(kcontrol);
 732         struct cx88_core *core = chip->core;
 733         u32 bit = kcontrol->private_value;
 734         int ret = 0;
 735         u32 vol;
 736
 737         spin_lock_irq(&chip->reg_lock);
 738         vol = cx_read(AUD_VOL_CTL);
 739         if (value->value.integer.value[0] != !(vol & bit)) {
 740                 vol ^= bit;
 741                 cx_swrite(SHADOW_AUD_VOL_CTL, AUD_VOL_CTL, vol);
 742                 /* Pass mute onto any WM8775 */
 743                 if (core->sd_wm8775 && ((1 << 6) == bit))
 744                         wm8775_s_ctrl(core,
 745                                       V4L2_CID_AUDIO_MUTE, 0 != (vol & bit));
 746                 ret = 1;
 747         }
 748         spin_unlock_irq(&chip->reg_lock);
 749         return ret;
 750 }
 751
 752 static const struct snd_kcontrol_new snd_cx88_dac_switch = {
 753         .iface = SNDRV_CTL_ELEM_IFACE_MIXER,
 754         .name = "Audio-Out Switch",
 755         .info = snd_ctl_boolean_mono_info,
 756         .get = snd_cx88_switch_get,
 757         .put = snd_cx88_switch_put,
 758         .private_value = (1 << 8),
 759 };
 760
 761 static const struct snd_kcontrol_new snd_cx88_source_switch = {
 762         .iface = SNDRV_CTL_ELEM_IFACE_MIXER,
 763         .name = "Analog-TV Switch",
 764         .info = snd_ctl_boolean_mono_info,
 765         .get = snd_cx88_switch_get,
 766         .put = snd_cx88_switch_put,
 767         .private_value = (1 << 6),
 768 };
 769
 770 static int snd_cx88_alc_get(struct snd_kcontrol *kcontrol,
 771                             struct snd_ctl_elem_value *value)
 772 {
 773         struct cx88_audio_dev *chip = snd_kcontrol_chip(kcontrol);
 774         struct cx88_core *core = chip->core;
 775         s32 val;
 776
 777         val = wm8775_g_ctrl(core, V4L2_CID_AUDIO_LOUDNESS);
 778         value->value.integer.value[0] = val ? 1 : 0;
 779         return 0;
 780 }
 781
 782 static int snd_cx88_alc_put(struct snd_kcontrol *kcontrol,
 783                             struct snd_ctl_elem_value *value)
 784 {
 785         struct cx88_audio_dev *chip = snd_kcontrol_chip(kcontrol);
 786         struct cx88_core *core = chip->core;
 787
 788         wm8775_s_ctrl(core, V4L2_CID_AUDIO_LOUDNESS,
 789                       value->value.integer.value[0] != 0);
 790         return 0;
 791 }
 792
 793 static const struct snd_kcontrol_new snd_cx88_alc_switch = {
 794         .iface = SNDRV_CTL_ELEM_IFACE_MIXER,
 795         .name = "Line-In ALC Switch",
 796         .info = snd_ctl_boolean_mono_info,
 797         .get = snd_cx88_alc_get,
 798         .put = snd_cx88_alc_put,
 799 };
 800
 801 /*
 802  * Basic Flow for Sound Devices
 803  */
 804
 805 /*
 806  * PCI ID Table - 14f1:8801 and 14f1:8811 means function 1: Audio
 807  * Only boards with eeprom and byte 1 at eeprom=1 have it
 808  */
 809
 810 static const struct pci_device_id cx88_audio_pci_tbl[] = {
 811         {0x14f1, 0x8801, PCI_ANY_ID, PCI_ANY_ID, 0, 0, 0},
 812         {0x14f1, 0x8811, PCI_ANY_ID, PCI_ANY_ID, 0, 0, 0},
 813         {0, }
 814 };
 815 MODULE_DEVICE_TABLE(pci, cx88_audio_pci_tbl);
 816
 817 /*
 818  * Chip-specific destructor
 819  */
 820
 821 static int snd_cx88_free(struct cx88_audio_dev *chip)
 822 {
 823         if (chip->irq >= 0)
 824                 free_irq(chip->irq, chip);
 825
 826         cx88_core_put(chip->core, chip->pci);
 827
 828         pci_disable_device(chip->pci);
 829         return 0;
 830 }
 831
 832 /*
 833  * Component Destructor
 834  */
 835 static void snd_cx88_dev_free(struct snd_card *card)
 836 {
 837         struct cx88_audio_dev *chip = card->private_data;
 838
 839         snd_cx88_free(chip);
 840 }
 841
 842 /*
 843  * Alsa Constructor - Component probe
 844  */
 845
 846 static int devno;
 847 static int snd_cx88_create(struct snd_card *card, struct pci_dev *pci,
 848                            struct cx88_audio_dev **rchip,
 849                            struct cx88_core **core_ptr)
 850 {
 851         struct cx88_audio_dev   *chip;
 852         struct cx88_core        *core;
 853         int                     err;
 854         unsigned char           pci_lat;
 855
 856         *rchip = NULL;
 857
 858         err = pci_enable_device(pci);
 859         if (err < 0)
 860                 return err;
 861
 862         pci_set_master(pci);
 863
 864         chip = card->private_data;
 865
 866         core = cx88_core_get(pci);
 867         if (!core) {
 868                 err = -EINVAL;
 869                 return err;
 870         }
 871
 872         err = pci_set_dma_mask(pci, DMA_BIT_MASK(32));
 873         if (err) {
 874                 dprintk(0, "%s/1: Oops: no 32bit PCI DMA ???\n", core->name);
 875                 cx88_core_put(core, pci);
 876                 return err;
 877         }
 878
 879         /* pci init */
 880         chip->card = card;
 881         chip->pci = pci;
 882         chip->irq = -1;
 883         spin_lock_init(&chip->reg_lock);
 884
 885         chip->core = core;
 886
 887         /* get irq */
 888         err = request_irq(chip->pci->irq, cx8801_irq,
 889                           IRQF_SHARED, chip->core->name, chip);
 890         if (err < 0) {
 891                 dprintk(0, "%s: can't get IRQ %d\n",
 892                         chip->core->name, chip->pci->irq);
 893                 return err;
 894         }
 895
 896         /* print pci info */
 897         pci_read_config_byte(pci, PCI_LATENCY_TIMER, &pci_lat);
 898
 899         dprintk(1,
 900                 "ALSA %s/%i: found at %s, rev: %d, irq: %d, latency: %d, mmio: 0x%llx\n",
 901                 core->name, devno,
 902                 pci_name(pci), pci->revision, pci->irq,
 903                 pci_lat, (unsigned long long)pci_resource_start(pci, 0));
 904
 905         chip->irq = pci->irq;
 906         synchronize_irq(chip->irq);
 907
 908         *rchip = chip;
 909         *core_ptr = core;
 910
 911         return 0;
 912 }
 913
 914 static int cx88_audio_initdev(struct pci_dev *pci,
 915                               const struct pci_device_id *pci_id)
 916 {
 917         struct snd_card         *card;
 918         struct cx88_audio_dev   *chip;
 919         struct cx88_core        *core = NULL;
 920         int                     err;
 921
 922         if (devno >= SNDRV_CARDS)
 923                 return (-ENODEV);
 924
 925         if (!enable[devno]) {
 926                 ++devno;
 927                 return (-ENOENT);
 928         }
 929
 930         err = snd_card_new(&pci->dev, index[devno], id[devno], THIS_MODULE,
 931                            sizeof(struct cx88_audio_dev), &card);
 932         if (err < 0)
 933                 return err;
 934
 935         card->private_free = snd_cx88_dev_free;
 936
 937         err = snd_cx88_create(card, pci, &chip, &core);
 938         if (err < 0)
 939                 goto error;
 940
 941         err = snd_cx88_pcm(chip, 0, "CX88 Digital");
 942         if (err < 0)
 943                 goto error;
 944
 945         err = snd_ctl_add(card, snd_ctl_new1(&snd_cx88_volume, chip));
 946         if (err < 0)
 947                 goto error;
 948         err = snd_ctl_add(card, snd_ctl_new1(&snd_cx88_dac_switch, chip));
 949         if (err < 0)
 950                 goto error;
 951         err = snd_ctl_add(card, snd_ctl_new1(&snd_cx88_source_switch, chip));
 952         if (err < 0)
 953                 goto error;
 954
 955         /* If there's a wm8775 then add a Line-In ALC switch */
 956         if (core->sd_wm8775) {
 957                 err = snd_ctl_add(card, snd_ctl_new1(&snd_cx88_alc_switch, chip));
 958                 if (err < 0)
 959                         goto error;
 960         }
 961
 962         strscpy(card->driver, "CX88x", sizeof(card->driver));
 963         sprintf(card->shortname, "Conexant CX%x", pci->device);
 964         sprintf(card->longname, "%s at %#llx",
 965                 card->shortname,
 966                 (unsigned long long)pci_resource_start(pci, 0));
 967         strscpy(card->mixername, "CX88", sizeof(card->mixername));
 968
 969         dprintk(0, "%s/%i: ALSA support for cx2388x boards\n",
 970                 card->driver, devno);
 971
 972         err = snd_card_register(card);
 973         if (err < 0)
 974                 goto error;
 975         pci_set_drvdata(pci, card);
 976
 977         devno++;
 978         return 0;
 979
 980 error:
 981         snd_card_free(card);
 982         return err;
 983 }
 984
 985 /*
 986  * ALSA destructor
 987  */
 988 static void cx88_audio_finidev(struct pci_dev *pci)
 989 {
 990         struct snd_card *card = pci_get_drvdata(pci);
 991
 992         snd_card_free(card);
 993
 994         devno--;
 995 }
 996
 997 /*
 998  * PCI driver definition
 999  */
1000
1001 static struct pci_driver cx88_audio_pci_driver = {
1002         .name     = "cx88_audio",
1003         .id_table = cx88_audio_pci_tbl,
1004         .probe    = cx88_audio_initdev,
1005         .remove   = cx88_audio_finidev,
1006 };
1007
1008 module_pci_driver(cx88_audio_pci_driver);