1 // SPDX-License-Identifier: GPL-2.0-only 2 /* 3 * Driver for the Conexant CX25821 PCIe bridge 4 * 5 * Copyright (C) 2009 Conexant Systems Inc. 6 * Authors <shu.lin@conexant.com>, <hiep.huynh@conexant.com> 7 * Based on SAA713x ALSA driver and CX88 driver 8 */ 9 10 #define pr_fmt(fmt) KBUILD_MODNAME ": " fmt 11 12 #include <linux/module.h> 13 #include <linux/init.h> 14 #include <linux/device.h> 15 #include <linux/interrupt.h> 16 #include <linux/vmalloc.h> 17 #include <linux/dma-mapping.h> 18 #include <linux/pci.h> 19 #include <linux/slab.h> 20 21 #include <linux/delay.h> 22 #include <sound/core.h> 23 #include <sound/pcm.h> 24 #include <sound/pcm_params.h> 25 #include <sound/control.h> 26 #include <sound/initval.h> 27 #include <sound/tlv.h> 28 29 #include "cx25821.h" 30 #include "cx25821-reg.h" 31 32 #define AUDIO_SRAM_CHANNEL SRAM_CH08 33 34 #define dprintk(level, fmt, arg...) \ 35 do { \ 36 if (debug >= level) \ 37 pr_info("%s/1: " fmt, chip->dev->name, ##arg); \ 38 } while (0) 39 #define dprintk_core(level, fmt, arg...) \ 40 do { \ 41 if (debug >= level) \ 42 printk(KERN_DEBUG "%s/1: " fmt, chip->dev->name, ##arg); \ 43 } while (0) 44 45 /**************************************************************************** 46 Data type declarations - Can be moded to a header file later 47 ****************************************************************************/ 48 49 static int devno; 50 51 struct cx25821_audio_buffer { 52 unsigned int bpl; 53 struct cx25821_riscmem risc; 54 void *vaddr; 55 struct scatterlist *sglist; 56 int sglen; 57 int nr_pages; 58 }; 59 60 struct cx25821_audio_dev { 61 struct cx25821_dev *dev; 62 struct cx25821_dmaqueue q; 63 64 /* pci i/o */ 65 struct pci_dev *pci; 66 67 /* audio controls */ 68 int irq; 69 70 struct snd_card *card; 71 72 unsigned long iobase; 73 spinlock_t reg_lock; 74 atomic_t count; 75 76 unsigned int dma_size; 77 unsigned int period_size; 78 unsigned int num_periods; 79 80 struct cx25821_audio_buffer *buf; 81 82 struct snd_pcm_substream *substream; 83 }; 84 85 86 /**************************************************************************** 87 Module global static vars 88 ****************************************************************************/ 89 90 static int index[SNDRV_CARDS] = SNDRV_DEFAULT_IDX; /* Index 0-MAX */ 91 static char *id[SNDRV_CARDS] = SNDRV_DEFAULT_STR; /* ID for this card */ 92 static bool enable[SNDRV_CARDS] = SNDRV_DEFAULT_ENABLE_PNP; 93 94 module_param_array(enable, bool, NULL, 0444); 95 MODULE_PARM_DESC(enable, "Enable cx25821 soundcard. default enabled."); 96 97 module_param_array(index, int, NULL, 0444); 98 MODULE_PARM_DESC(index, "Index value for cx25821 capture interface(s)."); 99 100 /**************************************************************************** 101 Module macros 102 ****************************************************************************/ 103 104 MODULE_DESCRIPTION("ALSA driver module for cx25821 based capture cards"); 105 MODULE_AUTHOR("Hiep Huynh"); 106 MODULE_LICENSE("GPL"); 107 MODULE_SUPPORTED_DEVICE("{{Conexant,25821}"); /* "{{Conexant,23881}," */ 108 109 static unsigned int debug; 110 module_param(debug, int, 0644); 111 MODULE_PARM_DESC(debug, "enable debug messages"); 112 113 /**************************************************************************** 114 Module specific functions 115 ****************************************************************************/ 116 /* Constants taken from cx88-reg.h */ 117 #define AUD_INT_DN_RISCI1 (1 << 0) 118 #define AUD_INT_UP_RISCI1 (1 << 1) 119 #define AUD_INT_RDS_DN_RISCI1 (1 << 2) 120 #define AUD_INT_DN_RISCI2 (1 << 4) /* yes, 3 is skipped */ 121 #define AUD_INT_UP_RISCI2 (1 << 5) 122 #define AUD_INT_RDS_DN_RISCI2 (1 << 6) 123 #define AUD_INT_DN_SYNC (1 << 12) 124 #define AUD_INT_UP_SYNC (1 << 13) 125 #define AUD_INT_RDS_DN_SYNC (1 << 14) 126 #define AUD_INT_OPC_ERR (1 << 16) 127 #define AUD_INT_BER_IRQ (1 << 20) 128 #define AUD_INT_MCHG_IRQ (1 << 21) 129 #define GP_COUNT_CONTROL_RESET 0x3 130 131 #define PCI_MSK_AUD_EXT (1 << 4) 132 #define PCI_MSK_AUD_INT (1 << 3) 133 134 static int cx25821_alsa_dma_init(struct cx25821_audio_dev *chip, int nr_pages) 135 { 136 struct cx25821_audio_buffer *buf = chip->buf; 137 struct page *pg; 138 int i; 139 140 buf->vaddr = vmalloc_32(nr_pages << PAGE_SHIFT); 141 if (NULL == buf->vaddr) { 142 dprintk(1, "vmalloc_32(%d pages) failed\n", nr_pages); 143 return -ENOMEM; 144 } 145 146 dprintk(1, "vmalloc is at addr 0x%p, size=%d\n", 147 buf->vaddr, 148 nr_pages << PAGE_SHIFT); 149 150 memset(buf->vaddr, 0, nr_pages << PAGE_SHIFT); 151 buf->nr_pages = nr_pages; 152 153 buf->sglist = vzalloc(array_size(sizeof(*buf->sglist), buf->nr_pages)); 154 if (NULL == buf->sglist) 155 goto vzalloc_err; 156 157 sg_init_table(buf->sglist, buf->nr_pages); 158 for (i = 0; i < buf->nr_pages; i++) { 159 pg = vmalloc_to_page(buf->vaddr + i * PAGE_SIZE); 160 if (NULL == pg) 161 goto vmalloc_to_page_err; 162 sg_set_page(&buf->sglist[i], pg, PAGE_SIZE, 0); 163 } 164 return 0; 165 166 vmalloc_to_page_err: 167 vfree(buf->sglist); 168 buf->sglist = NULL; 169 vzalloc_err: 170 vfree(buf->vaddr); 171 buf->vaddr = NULL; 172 return -ENOMEM; 173 } 174 175 static int cx25821_alsa_dma_map(struct cx25821_audio_dev *dev) 176 { 177 struct cx25821_audio_buffer *buf = dev->buf; 178 179 buf->sglen = dma_map_sg(&dev->pci->dev, buf->sglist, 180 buf->nr_pages, PCI_DMA_FROMDEVICE); 181 182 if (0 == buf->sglen) { 183 pr_warn("%s: cx25821_alsa_map_sg failed\n", __func__); 184 return -ENOMEM; 185 } 186 return 0; 187 } 188 189 static int cx25821_alsa_dma_unmap(struct cx25821_audio_dev *dev) 190 { 191 struct cx25821_audio_buffer *buf = dev->buf; 192 193 if (!buf->sglen) 194 return 0; 195 196 dma_unmap_sg(&dev->pci->dev, buf->sglist, buf->sglen, PCI_DMA_FROMDEVICE); 197 buf->sglen = 0; 198 return 0; 199 } 200 201 static int cx25821_alsa_dma_free(struct cx25821_audio_buffer *buf) 202 { 203 vfree(buf->sglist); 204 buf->sglist = NULL; 205 vfree(buf->vaddr); 206 buf->vaddr = NULL; 207 return 0; 208 } 209 210 /* 211 * BOARD Specific: Sets audio DMA 212 */ 213 214 static int _cx25821_start_audio_dma(struct cx25821_audio_dev *chip) 215 { 216 struct cx25821_audio_buffer *buf = chip->buf; 217 struct cx25821_dev *dev = chip->dev; 218 const struct sram_channel *audio_ch = 219 &cx25821_sram_channels[AUDIO_SRAM_CHANNEL]; 220 u32 tmp = 0; 221 222 /* enable output on the GPIO 0 for the MCLK ADC (Audio) */ 223 cx25821_set_gpiopin_direction(chip->dev, 0, 0); 224 225 /* Make sure RISC/FIFO are off before changing FIFO/RISC settings */ 226 cx_clear(AUD_INT_DMA_CTL, 227 FLD_AUD_DST_A_RISC_EN | FLD_AUD_DST_A_FIFO_EN); 228 229 /* setup fifo + format - out channel */ 230 cx25821_sram_channel_setup_audio(chip->dev, audio_ch, buf->bpl, 231 buf->risc.dma); 232 233 /* sets bpl size */ 234 cx_write(AUD_A_LNGTH, buf->bpl); 235 236 /* reset counter */ 237 /* GP_COUNT_CONTROL_RESET = 0x3 */ 238 cx_write(AUD_A_GPCNT_CTL, GP_COUNT_CONTROL_RESET); 239 atomic_set(&chip->count, 0); 240 241 /* Set the input mode to 16-bit */ 242 tmp = cx_read(AUD_A_CFG); 243 cx_write(AUD_A_CFG, tmp | FLD_AUD_DST_PK_MODE | FLD_AUD_DST_ENABLE | 244 FLD_AUD_CLK_ENABLE); 245 246 /* 247 pr_info("DEBUG: Start audio DMA, %d B/line, cmds_start(0x%x)= %d lines/FIFO, %d periods, %d byte buffer\n", 248 buf->bpl, audio_ch->cmds_start, 249 cx_read(audio_ch->cmds_start + 12)>>1, 250 chip->num_periods, buf->bpl * chip->num_periods); 251 */ 252 253 /* Enables corresponding bits at AUD_INT_STAT */ 254 cx_write(AUD_A_INT_MSK, FLD_AUD_DST_RISCI1 | FLD_AUD_DST_OF | 255 FLD_AUD_DST_SYNC | FLD_AUD_DST_OPC_ERR); 256 257 /* Clean any pending interrupt bits already set */ 258 cx_write(AUD_A_INT_STAT, ~0); 259 260 /* enable audio irqs */ 261 cx_set(PCI_INT_MSK, chip->dev->pci_irqmask | PCI_MSK_AUD_INT); 262 263 /* Turn on audio downstream fifo and risc enable 0x101 */ 264 tmp = cx_read(AUD_INT_DMA_CTL); 265 cx_set(AUD_INT_DMA_CTL, tmp | 266 (FLD_AUD_DST_A_RISC_EN | FLD_AUD_DST_A_FIFO_EN)); 267 268 mdelay(100); 269 return 0; 270 } 271 272 /* 273 * BOARD Specific: Resets audio DMA 274 */ 275 static int _cx25821_stop_audio_dma(struct cx25821_audio_dev *chip) 276 { 277 struct cx25821_dev *dev = chip->dev; 278 279 /* stop dma */ 280 cx_clear(AUD_INT_DMA_CTL, 281 FLD_AUD_DST_A_RISC_EN | FLD_AUD_DST_A_FIFO_EN); 282 283 /* disable irqs */ 284 cx_clear(PCI_INT_MSK, PCI_MSK_AUD_INT); 285 cx_clear(AUD_A_INT_MSK, AUD_INT_OPC_ERR | AUD_INT_DN_SYNC | 286 AUD_INT_DN_RISCI2 | AUD_INT_DN_RISCI1); 287 288 return 0; 289 } 290 291 #define MAX_IRQ_LOOP 50 292 293 /* 294 * BOARD Specific: IRQ dma bits 295 */ 296 static char *cx25821_aud_irqs[32] = { 297 "dn_risci1", "up_risci1", "rds_dn_risc1", /* 0-2 */ 298 NULL, /* reserved */ 299 "dn_risci2", "up_risci2", "rds_dn_risc2", /* 4-6 */ 300 NULL, /* reserved */ 301 "dnf_of", "upf_uf", "rds_dnf_uf", /* 8-10 */ 302 NULL, /* reserved */ 303 "dn_sync", "up_sync", "rds_dn_sync", /* 12-14 */ 304 NULL, /* reserved */ 305 "opc_err", "par_err", "rip_err", /* 16-18 */ 306 "pci_abort", "ber_irq", "mchg_irq" /* 19-21 */ 307 }; 308 309 /* 310 * BOARD Specific: Threats IRQ audio specific calls 311 */ 312 static void cx25821_aud_irq(struct cx25821_audio_dev *chip, u32 status, 313 u32 mask) 314 { 315 struct cx25821_dev *dev = chip->dev; 316 317 if (0 == (status & mask)) 318 return; 319 320 cx_write(AUD_A_INT_STAT, status); 321 if (debug > 1 || (status & mask & ~0xff)) 322 cx25821_print_irqbits(dev->name, "irq aud", cx25821_aud_irqs, 323 ARRAY_SIZE(cx25821_aud_irqs), status, mask); 324 325 /* risc op code error */ 326 if (status & AUD_INT_OPC_ERR) { 327 pr_warn("WARNING %s/1: Audio risc op code error\n", dev->name); 328 329 cx_clear(AUD_INT_DMA_CTL, 330 FLD_AUD_DST_A_RISC_EN | FLD_AUD_DST_A_FIFO_EN); 331 cx25821_sram_channel_dump_audio(dev, 332 &cx25821_sram_channels[AUDIO_SRAM_CHANNEL]); 333 } 334 if (status & AUD_INT_DN_SYNC) { 335 pr_warn("WARNING %s: Downstream sync error!\n", dev->name); 336 cx_write(AUD_A_GPCNT_CTL, GP_COUNT_CONTROL_RESET); 337 return; 338 } 339 340 /* risc1 downstream */ 341 if (status & AUD_INT_DN_RISCI1) { 342 atomic_set(&chip->count, cx_read(AUD_A_GPCNT)); 343 snd_pcm_period_elapsed(chip->substream); 344 } 345 } 346 347 /* 348 * BOARD Specific: Handles IRQ calls 349 */ 350 static irqreturn_t cx25821_irq(int irq, void *dev_id) 351 { 352 struct cx25821_audio_dev *chip = dev_id; 353 struct cx25821_dev *dev = chip->dev; 354 u32 status, pci_status; 355 u32 audint_status, audint_mask; 356 int loop, handled = 0; 357 358 audint_status = cx_read(AUD_A_INT_STAT); 359 audint_mask = cx_read(AUD_A_INT_MSK); 360 status = cx_read(PCI_INT_STAT); 361 362 for (loop = 0; loop < 1; loop++) { 363 status = cx_read(PCI_INT_STAT); 364 if (0 == status) { 365 status = cx_read(PCI_INT_STAT); 366 audint_status = cx_read(AUD_A_INT_STAT); 367 audint_mask = cx_read(AUD_A_INT_MSK); 368 369 if (status) { 370 handled = 1; 371 cx_write(PCI_INT_STAT, status); 372 373 cx25821_aud_irq(chip, audint_status, 374 audint_mask); 375 break; 376 } else { 377 goto out; 378 } 379 } 380 381 handled = 1; 382 cx_write(PCI_INT_STAT, status); 383 384 cx25821_aud_irq(chip, audint_status, audint_mask); 385 } 386 387 pci_status = cx_read(PCI_INT_STAT); 388 389 if (handled) 390 cx_write(PCI_INT_STAT, pci_status); 391 392 out: 393 return IRQ_RETVAL(handled); 394 } 395 396 static int dsp_buffer_free(struct cx25821_audio_dev *chip) 397 { 398 struct cx25821_riscmem *risc = &chip->buf->risc; 399 400 BUG_ON(!chip->dma_size); 401 402 dprintk(2, "Freeing buffer\n"); 403 cx25821_alsa_dma_unmap(chip); 404 cx25821_alsa_dma_free(chip->buf); 405 pci_free_consistent(chip->pci, risc->size, risc->cpu, risc->dma); 406 kfree(chip->buf); 407 408 chip->buf = NULL; 409 chip->dma_size = 0; 410 411 return 0; 412 } 413 414 /**************************************************************************** 415 ALSA PCM Interface 416 ****************************************************************************/ 417 418 /* 419 * Digital hardware definition 420 */ 421 #define DEFAULT_FIFO_SIZE 384 422 static const struct snd_pcm_hardware snd_cx25821_digital_hw = { 423 .info = SNDRV_PCM_INFO_MMAP | SNDRV_PCM_INFO_INTERLEAVED | 424 SNDRV_PCM_INFO_BLOCK_TRANSFER | SNDRV_PCM_INFO_MMAP_VALID, 425 .formats = SNDRV_PCM_FMTBIT_S16_LE, 426 427 .rates = SNDRV_PCM_RATE_48000, 428 .rate_min = 48000, 429 .rate_max = 48000, 430 .channels_min = 2, 431 .channels_max = 2, 432 /* Analog audio output will be full of clicks and pops if there 433 are not exactly four lines in the SRAM FIFO buffer. */ 434 .period_bytes_min = DEFAULT_FIFO_SIZE / 3, 435 .period_bytes_max = DEFAULT_FIFO_SIZE / 3, 436 .periods_min = 1, 437 .periods_max = AUDIO_LINE_SIZE, 438 /* 128 * 128 = 16384 = 1024 * 16 */ 439 .buffer_bytes_max = (AUDIO_LINE_SIZE * AUDIO_LINE_SIZE), 440 }; 441 442 /* 443 * audio pcm capture open callback 444 */ 445 static int snd_cx25821_pcm_open(struct snd_pcm_substream *substream) 446 { 447 struct cx25821_audio_dev *chip = snd_pcm_substream_chip(substream); 448 struct snd_pcm_runtime *runtime = substream->runtime; 449 int err; 450 unsigned int bpl = 0; 451 452 if (!chip) { 453 pr_err("DEBUG: cx25821 can't find device struct. Can't proceed with open\n"); 454 return -ENODEV; 455 } 456 457 err = snd_pcm_hw_constraint_pow2(runtime, 0, 458 SNDRV_PCM_HW_PARAM_PERIODS); 459 if (err < 0) 460 goto _error; 461 462 chip->substream = substream; 463 464 runtime->hw = snd_cx25821_digital_hw; 465 466 if (cx25821_sram_channels[AUDIO_SRAM_CHANNEL].fifo_size != 467 DEFAULT_FIFO_SIZE) { 468 /* since there are 3 audio Clusters */ 469 bpl = cx25821_sram_channels[AUDIO_SRAM_CHANNEL].fifo_size / 3; 470 bpl &= ~7; /* must be multiple of 8 */ 471 472 if (bpl > AUDIO_LINE_SIZE) 473 bpl = AUDIO_LINE_SIZE; 474 475 runtime->hw.period_bytes_min = bpl; 476 runtime->hw.period_bytes_max = bpl; 477 } 478 479 return 0; 480 _error: 481 dprintk(1, "Error opening PCM!\n"); 482 return err; 483 } 484 485 /* 486 * audio close callback 487 */ 488 static int snd_cx25821_close(struct snd_pcm_substream *substream) 489 { 490 return 0; 491 } 492 493 /* 494 * hw_params callback 495 */ 496 static int snd_cx25821_hw_params(struct snd_pcm_substream *substream, 497 struct snd_pcm_hw_params *hw_params) 498 { 499 struct cx25821_audio_dev *chip = snd_pcm_substream_chip(substream); 500 struct cx25821_audio_buffer *buf; 501 int ret; 502 503 if (substream->runtime->dma_area) { 504 dsp_buffer_free(chip); 505 substream->runtime->dma_area = NULL; 506 } 507 508 chip->period_size = params_period_bytes(hw_params); 509 chip->num_periods = params_periods(hw_params); 510 chip->dma_size = chip->period_size * params_periods(hw_params); 511 512 BUG_ON(!chip->dma_size); 513 BUG_ON(chip->num_periods & (chip->num_periods - 1)); 514 515 buf = kzalloc(sizeof(*buf), GFP_KERNEL); 516 if (NULL == buf) 517 return -ENOMEM; 518 519 if (chip->period_size > AUDIO_LINE_SIZE) 520 chip->period_size = AUDIO_LINE_SIZE; 521 522 buf->bpl = chip->period_size; 523 chip->buf = buf; 524 525 ret = cx25821_alsa_dma_init(chip, 526 (PAGE_ALIGN(chip->dma_size) >> PAGE_SHIFT)); 527 if (ret < 0) 528 goto error; 529 530 ret = cx25821_alsa_dma_map(chip); 531 if (ret < 0) 532 goto error; 533 534 ret = cx25821_risc_databuffer_audio(chip->pci, &buf->risc, buf->sglist, 535 chip->period_size, chip->num_periods, 1); 536 if (ret < 0) { 537 pr_info("DEBUG: ERROR after cx25821_risc_databuffer_audio()\n"); 538 goto error; 539 } 540 541 /* Loop back to start of program */ 542 buf->risc.jmp[0] = cpu_to_le32(RISC_JUMP | RISC_IRQ1 | RISC_CNT_INC); 543 buf->risc.jmp[1] = cpu_to_le32(buf->risc.dma); 544 buf->risc.jmp[2] = cpu_to_le32(0); /* bits 63-32 */ 545 546 substream->runtime->dma_area = chip->buf->vaddr; 547 substream->runtime->dma_bytes = chip->dma_size; 548 substream->runtime->dma_addr = 0; 549 550 return 0; 551 552 error: 553 chip->buf = NULL; 554 kfree(buf); 555 return ret; 556 } 557 558 /* 559 * hw free callback 560 */ 561 static int snd_cx25821_hw_free(struct snd_pcm_substream *substream) 562 { 563 struct cx25821_audio_dev *chip = snd_pcm_substream_chip(substream); 564 565 if (substream->runtime->dma_area) { 566 dsp_buffer_free(chip); 567 substream->runtime->dma_area = NULL; 568 } 569 570 return 0; 571 } 572 573 /* 574 * prepare callback 575 */ 576 static int snd_cx25821_prepare(struct snd_pcm_substream *substream) 577 { 578 return 0; 579 } 580 581 /* 582 * trigger callback 583 */ 584 static int snd_cx25821_card_trigger(struct snd_pcm_substream *substream, 585 int cmd) 586 { 587 struct cx25821_audio_dev *chip = snd_pcm_substream_chip(substream); 588 int err = 0; 589 590 /* Local interrupts are already disabled by ALSA */ 591 spin_lock(&chip->reg_lock); 592 593 switch (cmd) { 594 case SNDRV_PCM_TRIGGER_START: 595 err = _cx25821_start_audio_dma(chip); 596 break; 597 case SNDRV_PCM_TRIGGER_STOP: 598 err = _cx25821_stop_audio_dma(chip); 599 break; 600 default: 601 err = -EINVAL; 602 break; 603 } 604 605 spin_unlock(&chip->reg_lock); 606 607 return err; 608 } 609 610 /* 611 * pointer callback 612 */ 613 static snd_pcm_uframes_t snd_cx25821_pointer(struct snd_pcm_substream 614 *substream) 615 { 616 struct cx25821_audio_dev *chip = snd_pcm_substream_chip(substream); 617 struct snd_pcm_runtime *runtime = substream->runtime; 618 u16 count; 619 620 count = atomic_read(&chip->count); 621 622 return runtime->period_size * (count & (runtime->periods - 1)); 623 } 624 625 /* 626 * page callback (needed for mmap) 627 */ 628 static struct page *snd_cx25821_page(struct snd_pcm_substream *substream, 629 unsigned long offset) 630 { 631 void *pageptr = substream->runtime->dma_area + offset; 632 633 return vmalloc_to_page(pageptr); 634 } 635 636 /* 637 * operators 638 */ 639 static const struct snd_pcm_ops snd_cx25821_pcm_ops = { 640 .open = snd_cx25821_pcm_open, 641 .close = snd_cx25821_close, 642 .hw_params = snd_cx25821_hw_params, 643 .hw_free = snd_cx25821_hw_free, 644 .prepare = snd_cx25821_prepare, 645 .trigger = snd_cx25821_card_trigger, 646 .pointer = snd_cx25821_pointer, 647 .page = snd_cx25821_page, 648 }; 649 650 /* 651 * ALSA create a PCM device: Called when initializing the board. 652 * Sets up the name and hooks up the callbacks 653 */ 654 static int snd_cx25821_pcm(struct cx25821_audio_dev *chip, int device, 655 char *name) 656 { 657 struct snd_pcm *pcm; 658 int err; 659 660 err = snd_pcm_new(chip->card, name, device, 0, 1, &pcm); 661 if (err < 0) { 662 pr_info("ERROR: FAILED snd_pcm_new() in %s\n", __func__); 663 return err; 664 } 665 pcm->private_data = chip; 666 pcm->info_flags = 0; 667 strscpy(pcm->name, name, sizeof(pcm->name)); 668 snd_pcm_set_ops(pcm, SNDRV_PCM_STREAM_CAPTURE, &snd_cx25821_pcm_ops); 669 670 return 0; 671 } 672 673 /**************************************************************************** 674 Basic Flow for Sound Devices 675 ****************************************************************************/ 676 677 /* 678 * PCI ID Table - 14f1:8801 and 14f1:8811 means function 1: Audio 679 * Only boards with eeprom and byte 1 at eeprom=1 have it 680 */ 681 682 static const struct pci_device_id __maybe_unused cx25821_audio_pci_tbl[] = { 683 {0x14f1, 0x0920, PCI_ANY_ID, PCI_ANY_ID, 0, 0, 0}, 684 {0,} 685 }; 686 687 MODULE_DEVICE_TABLE(pci, cx25821_audio_pci_tbl); 688 689 /* 690 * Alsa Constructor - Component probe 691 */ 692 static int cx25821_audio_initdev(struct cx25821_dev *dev) 693 { 694 struct snd_card *card; 695 struct cx25821_audio_dev *chip; 696 int err; 697 698 if (devno >= SNDRV_CARDS) { 699 pr_info("DEBUG ERROR: devno >= SNDRV_CARDS %s\n", __func__); 700 return -ENODEV; 701 } 702 703 if (!enable[devno]) { 704 ++devno; 705 pr_info("DEBUG ERROR: !enable[devno] %s\n", __func__); 706 return -ENOENT; 707 } 708 709 err = snd_card_new(&dev->pci->dev, index[devno], id[devno], 710 THIS_MODULE, 711 sizeof(struct cx25821_audio_dev), &card); 712 if (err < 0) { 713 pr_info("DEBUG ERROR: cannot create snd_card_new in %s\n", 714 __func__); 715 return err; 716 } 717 718 strscpy(card->driver, "cx25821", sizeof(card->driver)); 719 720 /* Card "creation" */ 721 chip = card->private_data; 722 spin_lock_init(&chip->reg_lock); 723 724 chip->dev = dev; 725 chip->card = card; 726 chip->pci = dev->pci; 727 chip->iobase = pci_resource_start(dev->pci, 0); 728 729 chip->irq = dev->pci->irq; 730 731 err = request_irq(dev->pci->irq, cx25821_irq, 732 IRQF_SHARED, chip->dev->name, chip); 733 734 if (err < 0) { 735 pr_err("ERROR %s: can't get IRQ %d for ALSA\n", chip->dev->name, 736 dev->pci->irq); 737 goto error; 738 } 739 740 err = snd_cx25821_pcm(chip, 0, "cx25821 Digital"); 741 if (err < 0) { 742 pr_info("DEBUG ERROR: cannot create snd_cx25821_pcm %s\n", 743 __func__); 744 goto error; 745 } 746 747 strscpy(card->shortname, "cx25821", sizeof(card->shortname)); 748 sprintf(card->longname, "%s at 0x%lx irq %d", chip->dev->name, 749 chip->iobase, chip->irq); 750 strscpy(card->mixername, "CX25821", sizeof(card->mixername)); 751 752 pr_info("%s/%i: ALSA support for cx25821 boards\n", card->driver, 753 devno); 754 755 err = snd_card_register(card); 756 if (err < 0) { 757 pr_info("DEBUG ERROR: cannot register sound card %s\n", 758 __func__); 759 goto error; 760 } 761 762 dev->card = card; 763 devno++; 764 return 0; 765 766 error: 767 snd_card_free(card); 768 return err; 769 } 770 771 /**************************************************************************** 772 LINUX MODULE INIT 773 ****************************************************************************/ 774 775 static int cx25821_alsa_exit_callback(struct device *dev, void *data) 776 { 777 struct v4l2_device *v4l2_dev = dev_get_drvdata(dev); 778 struct cx25821_dev *cxdev = get_cx25821(v4l2_dev); 779 780 snd_card_free(cxdev->card); 781 return 0; 782 } 783 784 static void cx25821_audio_fini(void) 785 { 786 struct device_driver *drv = driver_find("cx25821", &pci_bus_type); 787 int ret; 788 789 ret = driver_for_each_device(drv, NULL, NULL, cx25821_alsa_exit_callback); 790 if (ret) 791 pr_err("%s failed to find a cx25821 driver.\n", __func__); 792 } 793 794 static int cx25821_alsa_init_callback(struct device *dev, void *data) 795 { 796 struct v4l2_device *v4l2_dev = dev_get_drvdata(dev); 797 struct cx25821_dev *cxdev = get_cx25821(v4l2_dev); 798 799 cx25821_audio_initdev(cxdev); 800 return 0; 801 } 802 803 /* 804 * Module initializer 805 * 806 * Loops through present saa7134 cards, and assigns an ALSA device 807 * to each one 808 * 809 */ 810 static int cx25821_alsa_init(void) 811 { 812 struct device_driver *drv = driver_find("cx25821", &pci_bus_type); 813 814 return driver_for_each_device(drv, NULL, NULL, cx25821_alsa_init_callback); 815 816 } 817 818 late_initcall(cx25821_alsa_init); 819 module_exit(cx25821_audio_fini); 820