Loading...
1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21 22 23 24 25 26 27 28 29 30 31 32 33 34 35 36 37 38 39 40 41 42 43 44 45 46 47 48 49 50 51 52 53 54 55 56 57 58 59 60 61 62 63 64 65 66 67 68 69 70 71 72 73 74 75 76 77 78 79 80 81 82 83 84 85 86 87 88 89 90 91 92 93 94 95 96 97 98 99 100 101 102 103 104 105 106 107 108 109 110 111 112 113 114 115 116 117 118 119 120 121 122 123 124 125 126 127 128 129 130 131 132 133 134 135 136 137 138 139 140 141 142 143 144 145 146 147 148 149 150 151 152 153 154 155 156 157 158 159 160 161 162 163 164 165 166 167 168 169 170 171 172 173 174 175 176 177 178 179 180 181 182 183 184 185 186 187 188 189 190 191 192 193 194 195 196 197 198 199 200 201 202 203 204 205 206 207 208 209 210 211 212 213 214 215 216 217 218 219 220 221 222 223 224 225 226 227 228 229 230 231 232 233 234 235 236 237 238 239 240 241 242 243 244 245 246 247 248 249 250 251 252 253 254 255 256 257 258 259 260 261 262 263 264 265 266 267 268 269 270 271 272 273 274 275 276 277 278 279 280 281 282 283 284 285 286 287 288 289 290 291 292 293 294 295 296 297 298 299 300 301 302 303 304 305 306 307 308 309 310 311 312 313 314 315 316 317 318 319 320 321 322 323 324 325 326 327 328 329 330 331 332 333 334 335 336 337 338 339 340 341 342 343 344 345 346 347 348 349 350 351 352 353 354 355 356 357 358 359 360 361 362 363 364 365 366 367 368 369 370 371 372 373 374 375 376 377 378 379 380 381 382 383 384 385 386 387 388 389 390 391 392 393 394 395 396 397 398 399 400 401 402 403 404 405 406 407 408 409 410 411 412 413 414 415 416 417 418 419 420 421 422 423 424 425 426 427 428 429 430 431 432 433 434 435 436 437 438 439 440 441 442 443 444 445 446 447 448 449 450 451 452 453 454 455 456 457 458 459 460 461 462 463 464 465 466 467 468 469 470 471 472 473 474 475 476 477 478 479 480 481 482 483 484 485 486 487 488 489 490 491 492 493 494 495 496 497 498 499 500 501 502 503 504 505 506 507 508 509 510 511 512 513 514 515 516 517 518 519 520 521 522 523 524 525 526 527 528 529 530 531 532 533 534 535 536 537 538 539 540 541 542 543 544 545 546 547 548 549 550 551 552 553 554 555 556 557 558 559 560 561 562 563 564 565 566 567 568 569 570 571 572 573 574 575 576 577 578 579 580 581 582 583 584 585 586 587 588 589 590 591 592 593 594 595 596 597 598 599 600 601 602 603 604 605 606 607 608 609 610 611 612 613 614 615 616 617 618 619 620 621 622 623 624 625 626 627 628 629 630 631 632 633 634 635 636 637 638 639 640 641 642 643 644 645 646 647 648 649 650 651 652 653 654 655 656 657 658 659 660 661 662 663 664 665 666 667 668 669 670 671 672 673 674 675 676 677 678 679 680 681 682 683 684 685 686 687 688 689 690 691 692 693 694 695 696 697 698 699 700 701 702 703 704 705 706 707 708 709 710 711 712 713 714 715 716 717 718 719 720 721 722 723 724 725 726 727 728 729 730 731 732 733 734 735 736 737 738 739 740 741 742 743 744 745 746 747 748 749 750 751 752 753 754 755 756 757 758 759 760 761 762 763 764 765 766 767 768 769 770 771 772 773 774 775 776 777 778 779 780 781 782 783 784 785 786 787 788 789 790 791 792 793 794 795 796 797 798 799 800 801 802 803 804 805 806 807 808 809 810 811 812 813 814 815 816 817 818 819 | // SPDX-License-Identifier: GPL-2.0-only /* * Driver for the Conexant CX25821 PCIe bridge * * Copyright (C) 2009 Conexant Systems Inc. * Authors <shu.lin@conexant.com>, <hiep.huynh@conexant.com> * Based on SAA713x ALSA driver and CX88 driver */ #define pr_fmt(fmt) KBUILD_MODNAME ": " fmt #include <linux/module.h> #include <linux/init.h> #include <linux/device.h> #include <linux/interrupt.h> #include <linux/vmalloc.h> #include <linux/dma-mapping.h> #include <linux/pci.h> #include <linux/slab.h> #include <linux/delay.h> #include <sound/core.h> #include <sound/pcm.h> #include <sound/pcm_params.h> #include <sound/control.h> #include <sound/initval.h> #include <sound/tlv.h> #include "cx25821.h" #include "cx25821-reg.h" #define AUDIO_SRAM_CHANNEL SRAM_CH08 #define dprintk(level, fmt, arg...) \ do { \ if (debug >= level) \ pr_info("%s/1: " fmt, chip->dev->name, ##arg); \ } while (0) #define dprintk_core(level, fmt, arg...) \ do { \ if (debug >= level) \ printk(KERN_DEBUG "%s/1: " fmt, chip->dev->name, ##arg); \ } while (0) /**************************************************************************** Data type declarations - Can be moded to a header file later ****************************************************************************/ static int devno; struct cx25821_audio_buffer { unsigned int bpl; struct cx25821_riscmem risc; void *vaddr; struct scatterlist *sglist; int sglen; unsigned long nr_pages; }; struct cx25821_audio_dev { struct cx25821_dev *dev; struct cx25821_dmaqueue q; /* pci i/o */ struct pci_dev *pci; /* audio controls */ int irq; struct snd_card *card; unsigned long iobase; spinlock_t reg_lock; atomic_t count; unsigned int dma_size; unsigned int period_size; unsigned int num_periods; struct cx25821_audio_buffer *buf; struct snd_pcm_substream *substream; }; /**************************************************************************** Module global static vars ****************************************************************************/ static int index[SNDRV_CARDS] = SNDRV_DEFAULT_IDX; /* Index 0-MAX */ static char *id[SNDRV_CARDS] = SNDRV_DEFAULT_STR; /* ID for this card */ static bool enable[SNDRV_CARDS] = SNDRV_DEFAULT_ENABLE_PNP; module_param_array(enable, bool, NULL, 0444); MODULE_PARM_DESC(enable, "Enable cx25821 soundcard. default enabled."); module_param_array(index, int, NULL, 0444); MODULE_PARM_DESC(index, "Index value for cx25821 capture interface(s)."); /**************************************************************************** Module macros ****************************************************************************/ MODULE_DESCRIPTION("ALSA driver module for cx25821 based capture cards"); MODULE_AUTHOR("Hiep Huynh"); MODULE_LICENSE("GPL"); static unsigned int debug; module_param(debug, int, 0644); MODULE_PARM_DESC(debug, "enable debug messages"); /**************************************************************************** Module specific functions ****************************************************************************/ /* Constants taken from cx88-reg.h */ #define AUD_INT_DN_RISCI1 (1 << 0) #define AUD_INT_UP_RISCI1 (1 << 1) #define AUD_INT_RDS_DN_RISCI1 (1 << 2) #define AUD_INT_DN_RISCI2 (1 << 4) /* yes, 3 is skipped */ #define AUD_INT_UP_RISCI2 (1 << 5) #define AUD_INT_RDS_DN_RISCI2 (1 << 6) #define AUD_INT_DN_SYNC (1 << 12) #define AUD_INT_UP_SYNC (1 << 13) #define AUD_INT_RDS_DN_SYNC (1 << 14) #define AUD_INT_OPC_ERR (1 << 16) #define AUD_INT_BER_IRQ (1 << 20) #define AUD_INT_MCHG_IRQ (1 << 21) #define GP_COUNT_CONTROL_RESET 0x3 #define PCI_MSK_AUD_EXT (1 << 4) #define PCI_MSK_AUD_INT (1 << 3) static int cx25821_alsa_dma_init(struct cx25821_audio_dev *chip, unsigned long nr_pages) { struct cx25821_audio_buffer *buf = chip->buf; struct page *pg; int i; buf->vaddr = vmalloc_32(nr_pages << PAGE_SHIFT); if (NULL == buf->vaddr) { dprintk(1, "vmalloc_32(%lu pages) failed\n", nr_pages); return -ENOMEM; } dprintk(1, "vmalloc is at addr 0x%p, size=%lu\n", buf->vaddr, nr_pages << PAGE_SHIFT); memset(buf->vaddr, 0, nr_pages << PAGE_SHIFT); buf->nr_pages = nr_pages; buf->sglist = vzalloc(array_size(sizeof(*buf->sglist), buf->nr_pages)); if (NULL == buf->sglist) goto vzalloc_err; sg_init_table(buf->sglist, buf->nr_pages); for (i = 0; i < buf->nr_pages; i++) { pg = vmalloc_to_page(buf->vaddr + i * PAGE_SIZE); if (NULL == pg) goto vmalloc_to_page_err; sg_set_page(&buf->sglist[i], pg, PAGE_SIZE, 0); } return 0; vmalloc_to_page_err: vfree(buf->sglist); buf->sglist = NULL; vzalloc_err: vfree(buf->vaddr); buf->vaddr = NULL; return -ENOMEM; } static int cx25821_alsa_dma_map(struct cx25821_audio_dev *dev) { struct cx25821_audio_buffer *buf = dev->buf; buf->sglen = dma_map_sg(&dev->pci->dev, buf->sglist, buf->nr_pages, DMA_FROM_DEVICE); if (0 == buf->sglen) { pr_warn("%s: cx25821_alsa_map_sg failed\n", __func__); return -ENOMEM; } return 0; } static int cx25821_alsa_dma_unmap(struct cx25821_audio_dev *dev) { struct cx25821_audio_buffer *buf = dev->buf; if (!buf->sglen) return 0; dma_unmap_sg(&dev->pci->dev, buf->sglist, buf->nr_pages, DMA_FROM_DEVICE); buf->sglen = 0; return 0; } static int cx25821_alsa_dma_free(struct cx25821_audio_buffer *buf) { vfree(buf->sglist); buf->sglist = NULL; vfree(buf->vaddr); buf->vaddr = NULL; return 0; } /* * BOARD Specific: Sets audio DMA */ static int _cx25821_start_audio_dma(struct cx25821_audio_dev *chip) { struct cx25821_audio_buffer *buf = chip->buf; struct cx25821_dev *dev = chip->dev; const struct sram_channel *audio_ch = &cx25821_sram_channels[AUDIO_SRAM_CHANNEL]; u32 tmp = 0; /* enable output on the GPIO 0 for the MCLK ADC (Audio) */ cx25821_set_gpiopin_direction(chip->dev, 0, 0); /* Make sure RISC/FIFO are off before changing FIFO/RISC settings */ cx_clear(AUD_INT_DMA_CTL, FLD_AUD_DST_A_RISC_EN | FLD_AUD_DST_A_FIFO_EN); /* setup fifo + format - out channel */ cx25821_sram_channel_setup_audio(chip->dev, audio_ch, buf->bpl, buf->risc.dma); /* sets bpl size */ cx_write(AUD_A_LNGTH, buf->bpl); /* reset counter */ /* GP_COUNT_CONTROL_RESET = 0x3 */ cx_write(AUD_A_GPCNT_CTL, GP_COUNT_CONTROL_RESET); atomic_set(&chip->count, 0); /* Set the input mode to 16-bit */ tmp = cx_read(AUD_A_CFG); cx_write(AUD_A_CFG, tmp | FLD_AUD_DST_PK_MODE | FLD_AUD_DST_ENABLE | FLD_AUD_CLK_ENABLE); /* pr_info("DEBUG: Start audio DMA, %d B/line, cmds_start(0x%x)= %d lines/FIFO, %d periods, %d byte buffer\n", buf->bpl, audio_ch->cmds_start, cx_read(audio_ch->cmds_start + 12)>>1, chip->num_periods, buf->bpl * chip->num_periods); */ /* Enables corresponding bits at AUD_INT_STAT */ cx_write(AUD_A_INT_MSK, FLD_AUD_DST_RISCI1 | FLD_AUD_DST_OF | FLD_AUD_DST_SYNC | FLD_AUD_DST_OPC_ERR); /* Clean any pending interrupt bits already set */ cx_write(AUD_A_INT_STAT, ~0); /* enable audio irqs */ cx_set(PCI_INT_MSK, chip->dev->pci_irqmask | PCI_MSK_AUD_INT); /* Turn on audio downstream fifo and risc enable 0x101 */ tmp = cx_read(AUD_INT_DMA_CTL); cx_set(AUD_INT_DMA_CTL, tmp | (FLD_AUD_DST_A_RISC_EN | FLD_AUD_DST_A_FIFO_EN)); mdelay(100); return 0; } /* * BOARD Specific: Resets audio DMA */ static int _cx25821_stop_audio_dma(struct cx25821_audio_dev *chip) { struct cx25821_dev *dev = chip->dev; /* stop dma */ cx_clear(AUD_INT_DMA_CTL, FLD_AUD_DST_A_RISC_EN | FLD_AUD_DST_A_FIFO_EN); /* disable irqs */ cx_clear(PCI_INT_MSK, PCI_MSK_AUD_INT); cx_clear(AUD_A_INT_MSK, AUD_INT_OPC_ERR | AUD_INT_DN_SYNC | AUD_INT_DN_RISCI2 | AUD_INT_DN_RISCI1); return 0; } #define MAX_IRQ_LOOP 50 /* * BOARD Specific: IRQ dma bits */ static char *cx25821_aud_irqs[32] = { "dn_risci1", "up_risci1", "rds_dn_risc1", /* 0-2 */ NULL, /* reserved */ "dn_risci2", "up_risci2", "rds_dn_risc2", /* 4-6 */ NULL, /* reserved */ "dnf_of", "upf_uf", "rds_dnf_uf", /* 8-10 */ NULL, /* reserved */ "dn_sync", "up_sync", "rds_dn_sync", /* 12-14 */ NULL, /* reserved */ "opc_err", "par_err", "rip_err", /* 16-18 */ "pci_abort", "ber_irq", "mchg_irq" /* 19-21 */ }; /* * BOARD Specific: Threats IRQ audio specific calls */ static void cx25821_aud_irq(struct cx25821_audio_dev *chip, u32 status, u32 mask) { struct cx25821_dev *dev = chip->dev; if (0 == (status & mask)) return; cx_write(AUD_A_INT_STAT, status); if (debug > 1 || (status & mask & ~0xff)) cx25821_print_irqbits(dev->name, "irq aud", cx25821_aud_irqs, ARRAY_SIZE(cx25821_aud_irqs), status, mask); /* risc op code error */ if (status & AUD_INT_OPC_ERR) { pr_warn("WARNING %s/1: Audio risc op code error\n", dev->name); cx_clear(AUD_INT_DMA_CTL, FLD_AUD_DST_A_RISC_EN | FLD_AUD_DST_A_FIFO_EN); cx25821_sram_channel_dump_audio(dev, &cx25821_sram_channels[AUDIO_SRAM_CHANNEL]); } if (status & AUD_INT_DN_SYNC) { pr_warn("WARNING %s: Downstream sync error!\n", dev->name); cx_write(AUD_A_GPCNT_CTL, GP_COUNT_CONTROL_RESET); return; } /* risc1 downstream */ if (status & AUD_INT_DN_RISCI1) { atomic_set(&chip->count, cx_read(AUD_A_GPCNT)); snd_pcm_period_elapsed(chip->substream); } } /* * BOARD Specific: Handles IRQ calls */ static irqreturn_t cx25821_irq(int irq, void *dev_id) { struct cx25821_audio_dev *chip = dev_id; struct cx25821_dev *dev = chip->dev; u32 status, pci_status; u32 audint_status, audint_mask; int loop, handled = 0; audint_status = cx_read(AUD_A_INT_STAT); audint_mask = cx_read(AUD_A_INT_MSK); status = cx_read(PCI_INT_STAT); for (loop = 0; loop < 1; loop++) { status = cx_read(PCI_INT_STAT); if (0 == status) { status = cx_read(PCI_INT_STAT); audint_status = cx_read(AUD_A_INT_STAT); audint_mask = cx_read(AUD_A_INT_MSK); if (status) { handled = 1; cx_write(PCI_INT_STAT, status); cx25821_aud_irq(chip, audint_status, audint_mask); break; } else { goto out; } } handled = 1; cx_write(PCI_INT_STAT, status); cx25821_aud_irq(chip, audint_status, audint_mask); } pci_status = cx_read(PCI_INT_STAT); if (handled) cx_write(PCI_INT_STAT, pci_status); out: return IRQ_RETVAL(handled); } static int dsp_buffer_free(struct cx25821_audio_dev *chip) { struct cx25821_riscmem *risc = &chip->buf->risc; BUG_ON(!chip->dma_size); dprintk(2, "Freeing buffer\n"); cx25821_alsa_dma_unmap(chip); cx25821_alsa_dma_free(chip->buf); dma_free_coherent(&chip->pci->dev, risc->size, risc->cpu, risc->dma); kfree(chip->buf); chip->buf = NULL; chip->dma_size = 0; return 0; } /**************************************************************************** ALSA PCM Interface ****************************************************************************/ /* * Digital hardware definition */ #define DEFAULT_FIFO_SIZE 384 static const struct snd_pcm_hardware snd_cx25821_digital_hw = { .info = SNDRV_PCM_INFO_MMAP | SNDRV_PCM_INFO_INTERLEAVED | SNDRV_PCM_INFO_BLOCK_TRANSFER | SNDRV_PCM_INFO_MMAP_VALID, .formats = SNDRV_PCM_FMTBIT_S16_LE, .rates = SNDRV_PCM_RATE_48000, .rate_min = 48000, .rate_max = 48000, .channels_min = 2, .channels_max = 2, /* Analog audio output will be full of clicks and pops if there are not exactly four lines in the SRAM FIFO buffer. */ .period_bytes_min = DEFAULT_FIFO_SIZE / 3, .period_bytes_max = DEFAULT_FIFO_SIZE / 3, .periods_min = 1, .periods_max = AUDIO_LINE_SIZE, /* 128 * 128 = 16384 = 1024 * 16 */ .buffer_bytes_max = (AUDIO_LINE_SIZE * AUDIO_LINE_SIZE), }; /* * audio pcm capture open callback */ static int snd_cx25821_pcm_open(struct snd_pcm_substream *substream) { struct cx25821_audio_dev *chip = snd_pcm_substream_chip(substream); struct snd_pcm_runtime *runtime = substream->runtime; int err; unsigned int bpl = 0; if (!chip) { pr_err("DEBUG: cx25821 can't find device struct. Can't proceed with open\n"); return -ENODEV; } err = snd_pcm_hw_constraint_pow2(runtime, 0, SNDRV_PCM_HW_PARAM_PERIODS); if (err < 0) goto _error; chip->substream = substream; runtime->hw = snd_cx25821_digital_hw; if (cx25821_sram_channels[AUDIO_SRAM_CHANNEL].fifo_size != DEFAULT_FIFO_SIZE) { /* since there are 3 audio Clusters */ bpl = cx25821_sram_channels[AUDIO_SRAM_CHANNEL].fifo_size / 3; bpl &= ~7; /* must be multiple of 8 */ if (bpl > AUDIO_LINE_SIZE) bpl = AUDIO_LINE_SIZE; runtime->hw.period_bytes_min = bpl; runtime->hw.period_bytes_max = bpl; } return 0; _error: dprintk(1, "Error opening PCM!\n"); return err; } /* * audio close callback */ static int snd_cx25821_close(struct snd_pcm_substream *substream) { return 0; } /* * hw_params callback */ static int snd_cx25821_hw_params(struct snd_pcm_substream *substream, struct snd_pcm_hw_params *hw_params) { struct cx25821_audio_dev *chip = snd_pcm_substream_chip(substream); struct cx25821_audio_buffer *buf; int ret; if (substream->runtime->dma_area) { dsp_buffer_free(chip); substream->runtime->dma_area = NULL; } chip->period_size = params_period_bytes(hw_params); chip->num_periods = params_periods(hw_params); chip->dma_size = chip->period_size * params_periods(hw_params); BUG_ON(!chip->dma_size); BUG_ON(chip->num_periods & (chip->num_periods - 1)); buf = kzalloc(sizeof(*buf), GFP_KERNEL); if (NULL == buf) return -ENOMEM; if (chip->period_size > AUDIO_LINE_SIZE) chip->period_size = AUDIO_LINE_SIZE; buf->bpl = chip->period_size; chip->buf = buf; ret = cx25821_alsa_dma_init(chip, (PAGE_ALIGN(chip->dma_size) >> PAGE_SHIFT)); if (ret < 0) goto error; ret = cx25821_alsa_dma_map(chip); if (ret < 0) goto error; ret = cx25821_risc_databuffer_audio(chip->pci, &buf->risc, buf->sglist, chip->period_size, chip->num_periods, 1); if (ret < 0) { pr_info("DEBUG: ERROR after cx25821_risc_databuffer_audio()\n"); goto error; } /* Loop back to start of program */ buf->risc.jmp[0] = cpu_to_le32(RISC_JUMP | RISC_IRQ1 | RISC_CNT_INC); buf->risc.jmp[1] = cpu_to_le32(buf->risc.dma); buf->risc.jmp[2] = cpu_to_le32(0); /* bits 63-32 */ substream->runtime->dma_area = chip->buf->vaddr; substream->runtime->dma_bytes = chip->dma_size; substream->runtime->dma_addr = 0; return 0; error: chip->buf = NULL; kfree(buf); return ret; } /* * hw free callback */ static int snd_cx25821_hw_free(struct snd_pcm_substream *substream) { struct cx25821_audio_dev *chip = snd_pcm_substream_chip(substream); if (substream->runtime->dma_area) { dsp_buffer_free(chip); substream->runtime->dma_area = NULL; } return 0; } /* * prepare callback */ static int snd_cx25821_prepare(struct snd_pcm_substream *substream) { return 0; } /* * trigger callback */ static int snd_cx25821_card_trigger(struct snd_pcm_substream *substream, int cmd) { struct cx25821_audio_dev *chip = snd_pcm_substream_chip(substream); int err = 0; /* Local interrupts are already disabled by ALSA */ spin_lock(&chip->reg_lock); switch (cmd) { case SNDRV_PCM_TRIGGER_START: err = _cx25821_start_audio_dma(chip); break; case SNDRV_PCM_TRIGGER_STOP: err = _cx25821_stop_audio_dma(chip); break; default: err = -EINVAL; break; } spin_unlock(&chip->reg_lock); return err; } /* * pointer callback */ static snd_pcm_uframes_t snd_cx25821_pointer(struct snd_pcm_substream *substream) { struct cx25821_audio_dev *chip = snd_pcm_substream_chip(substream); struct snd_pcm_runtime *runtime = substream->runtime; u16 count; count = atomic_read(&chip->count); return runtime->period_size * (count & (runtime->periods - 1)); } /* * page callback (needed for mmap) */ static struct page *snd_cx25821_page(struct snd_pcm_substream *substream, unsigned long offset) { void *pageptr = substream->runtime->dma_area + offset; return vmalloc_to_page(pageptr); } /* * operators */ static const struct snd_pcm_ops snd_cx25821_pcm_ops = { .open = snd_cx25821_pcm_open, .close = snd_cx25821_close, .hw_params = snd_cx25821_hw_params, .hw_free = snd_cx25821_hw_free, .prepare = snd_cx25821_prepare, .trigger = snd_cx25821_card_trigger, .pointer = snd_cx25821_pointer, .page = snd_cx25821_page, }; /* * ALSA create a PCM device: Called when initializing the board. * Sets up the name and hooks up the callbacks */ static int snd_cx25821_pcm(struct cx25821_audio_dev *chip, int device, char *name) { struct snd_pcm *pcm; int err; err = snd_pcm_new(chip->card, name, device, 0, 1, &pcm); if (err < 0) { pr_info("ERROR: FAILED snd_pcm_new() in %s\n", __func__); return err; } pcm->private_data = chip; pcm->info_flags = 0; strscpy(pcm->name, name, sizeof(pcm->name)); snd_pcm_set_ops(pcm, SNDRV_PCM_STREAM_CAPTURE, &snd_cx25821_pcm_ops); return 0; } /**************************************************************************** Basic Flow for Sound Devices ****************************************************************************/ /* * PCI ID Table - 14f1:8801 and 14f1:8811 means function 1: Audio * Only boards with eeprom and byte 1 at eeprom=1 have it */ static const struct pci_device_id __maybe_unused cx25821_audio_pci_tbl[] = { {0x14f1, 0x0920, PCI_ANY_ID, PCI_ANY_ID, 0, 0, 0}, {0,} }; MODULE_DEVICE_TABLE(pci, cx25821_audio_pci_tbl); /* * Alsa Constructor - Component probe */ static int cx25821_audio_initdev(struct cx25821_dev *dev) { struct snd_card *card; struct cx25821_audio_dev *chip; int err; if (devno >= SNDRV_CARDS) { pr_info("DEBUG ERROR: devno >= SNDRV_CARDS %s\n", __func__); return -ENODEV; } if (!enable[devno]) { ++devno; pr_info("DEBUG ERROR: !enable[devno] %s\n", __func__); return -ENOENT; } err = snd_card_new(&dev->pci->dev, index[devno], id[devno], THIS_MODULE, sizeof(struct cx25821_audio_dev), &card); if (err < 0) { pr_info("DEBUG ERROR: cannot create snd_card_new in %s\n", __func__); return err; } strscpy(card->driver, "cx25821", sizeof(card->driver)); /* Card "creation" */ chip = card->private_data; spin_lock_init(&chip->reg_lock); chip->dev = dev; chip->card = card; chip->pci = dev->pci; chip->iobase = pci_resource_start(dev->pci, 0); chip->irq = dev->pci->irq; err = request_irq(dev->pci->irq, cx25821_irq, IRQF_SHARED, chip->dev->name, chip); if (err < 0) { pr_err("ERROR %s: can't get IRQ %d for ALSA\n", chip->dev->name, dev->pci->irq); goto error; } err = snd_cx25821_pcm(chip, 0, "cx25821 Digital"); if (err < 0) { pr_info("DEBUG ERROR: cannot create snd_cx25821_pcm %s\n", __func__); goto error; } strscpy(card->shortname, "cx25821", sizeof(card->shortname)); sprintf(card->longname, "%s at 0x%lx irq %d", chip->dev->name, chip->iobase, chip->irq); strscpy(card->mixername, "CX25821", sizeof(card->mixername)); pr_info("%s/%i: ALSA support for cx25821 boards\n", card->driver, devno); err = snd_card_register(card); if (err < 0) { pr_info("DEBUG ERROR: cannot register sound card %s\n", __func__); goto error; } dev->card = card; devno++; return 0; error: snd_card_free(card); return err; } /**************************************************************************** LINUX MODULE INIT ****************************************************************************/ static int cx25821_alsa_exit_callback(struct device *dev, void *data) { struct v4l2_device *v4l2_dev = dev_get_drvdata(dev); struct cx25821_dev *cxdev = get_cx25821(v4l2_dev); snd_card_free(cxdev->card); return 0; } static void cx25821_audio_fini(void) { struct device_driver *drv = driver_find("cx25821", &pci_bus_type); int ret; ret = driver_for_each_device(drv, NULL, NULL, cx25821_alsa_exit_callback); if (ret) pr_err("%s failed to find a cx25821 driver.\n", __func__); } static int cx25821_alsa_init_callback(struct device *dev, void *data) { struct v4l2_device *v4l2_dev = dev_get_drvdata(dev); struct cx25821_dev *cxdev = get_cx25821(v4l2_dev); cx25821_audio_initdev(cxdev); return 0; } /* * Module initializer * * Loops through present saa7134 cards, and assigns an ALSA device * to each one * */ static int cx25821_alsa_init(void) { struct device_driver *drv = driver_find("cx25821", &pci_bus_type); return driver_for_each_device(drv, NULL, NULL, cx25821_alsa_init_callback); } late_initcall(cx25821_alsa_init); module_exit(cx25821_audio_fini); |