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 unsigned long 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, 135 unsigned long nr_pages) 136 { 137 struct cx25821_audio_buffer *buf = chip->buf; 138 struct page *pg; 139 int i; 140 141 buf->vaddr = vmalloc_32(nr_pages << PAGE_SHIFT); 142 if (NULL == buf->vaddr) { 143 dprintk(1, "vmalloc_32(%lu pages) failed\n", nr_pages); 144 return -ENOMEM; 145 } 146 147 dprintk(1, "vmalloc is at addr 0x%p, size=%lu\n", 148 buf->vaddr, 149 nr_pages << PAGE_SHIFT); 150 151 memset(buf->vaddr, 0, nr_pages << PAGE_SHIFT); 152 buf->nr_pages = nr_pages; 153 154 buf->sglist = vzalloc(array_size(sizeof(*buf->sglist), buf->nr_pages)); 155 if (NULL == buf->sglist) 156 goto vzalloc_err; 157 158 sg_init_table(buf->sglist, buf->nr_pages); 159 for (i = 0; i < buf->nr_pages; i++) { 160 pg = vmalloc_to_page(buf->vaddr + i * PAGE_SIZE); 161 if (NULL == pg) 162 goto vmalloc_to_page_err; 163 sg_set_page(&buf->sglist[i], pg, PAGE_SIZE, 0); 164 } 165 return 0; 166 167 vmalloc_to_page_err: 168 vfree(buf->sglist); 169 buf->sglist = NULL; 170 vzalloc_err: 171 vfree(buf->vaddr); 172 buf->vaddr = NULL; 173 return -ENOMEM; 174 } 175 176 static int cx25821_alsa_dma_map(struct cx25821_audio_dev *dev) 177 { 178 struct cx25821_audio_buffer *buf = dev->buf; 179 180 buf->sglen = dma_map_sg(&dev->pci->dev, buf->sglist, 181 buf->nr_pages, DMA_FROM_DEVICE); 182 183 if (0 == buf->sglen) { 184 pr_warn("%s: cx25821_alsa_map_sg failed\n", __func__); 185 return -ENOMEM; 186 } 187 return 0; 188 } 189 190 static int cx25821_alsa_dma_unmap(struct cx25821_audio_dev *dev) 191 { 192 struct cx25821_audio_buffer *buf = dev->buf; 193 194 if (!buf->sglen) 195 return 0; 196 197 dma_unmap_sg(&dev->pci->dev, buf->sglist, buf->nr_pages, DMA_FROM_DEVICE); 198 buf->sglen = 0; 199 return 0; 200 } 201 202 static int cx25821_alsa_dma_free(struct cx25821_audio_buffer *buf) 203 { 204 vfree(buf->sglist); 205 buf->sglist = NULL; 206 vfree(buf->vaddr); 207 buf->vaddr = NULL; 208 return 0; 209 } 210 211 /* 212 * BOARD Specific: Sets audio DMA 213 */ 214 215 static int _cx25821_start_audio_dma(struct cx25821_audio_dev *chip) 216 { 217 struct cx25821_audio_buffer *buf = chip->buf; 218 struct cx25821_dev *dev = chip->dev; 219 const struct sram_channel *audio_ch = 220 &cx25821_sram_channels[AUDIO_SRAM_CHANNEL]; 221 u32 tmp = 0; 222 223 /* enable output on the GPIO 0 for the MCLK ADC (Audio) */ 224 cx25821_set_gpiopin_direction(chip->dev, 0, 0); 225 226 /* Make sure RISC/FIFO are off before changing FIFO/RISC settings */ 227 cx_clear(AUD_INT_DMA_CTL, 228 FLD_AUD_DST_A_RISC_EN | FLD_AUD_DST_A_FIFO_EN); 229 230 /* setup fifo + format - out channel */ 231 cx25821_sram_channel_setup_audio(chip->dev, audio_ch, buf->bpl, 232 buf->risc.dma); 233 234 /* sets bpl size */ 235 cx_write(AUD_A_LNGTH, buf->bpl); 236 237 /* reset counter */ 238 /* GP_COUNT_CONTROL_RESET = 0x3 */ 239 cx_write(AUD_A_GPCNT_CTL, GP_COUNT_CONTROL_RESET); 240 atomic_set(&chip->count, 0); 241 242 /* Set the input mode to 16-bit */ 243 tmp = cx_read(AUD_A_CFG); 244 cx_write(AUD_A_CFG, tmp | FLD_AUD_DST_PK_MODE | FLD_AUD_DST_ENABLE | 245 FLD_AUD_CLK_ENABLE); 246 247 /* 248 pr_info("DEBUG: Start audio DMA, %d B/line, cmds_start(0x%x)= %d lines/FIFO, %d periods, %d byte buffer\n", 249 buf->bpl, audio_ch->cmds_start, 250 cx_read(audio_ch->cmds_start + 12)>>1, 251 chip->num_periods, buf->bpl * chip->num_periods); 252 */ 253 254 /* Enables corresponding bits at AUD_INT_STAT */ 255 cx_write(AUD_A_INT_MSK, FLD_AUD_DST_RISCI1 | FLD_AUD_DST_OF | 256 FLD_AUD_DST_SYNC | FLD_AUD_DST_OPC_ERR); 257 258 /* Clean any pending interrupt bits already set */ 259 cx_write(AUD_A_INT_STAT, ~0); 260 261 /* enable audio irqs */ 262 cx_set(PCI_INT_MSK, chip->dev->pci_irqmask | PCI_MSK_AUD_INT); 263 264 /* Turn on audio downstream fifo and risc enable 0x101 */ 265 tmp = cx_read(AUD_INT_DMA_CTL); 266 cx_set(AUD_INT_DMA_CTL, tmp | 267 (FLD_AUD_DST_A_RISC_EN | FLD_AUD_DST_A_FIFO_EN)); 268 269 mdelay(100); 270 return 0; 271 } 272 273 /* 274 * BOARD Specific: Resets audio DMA 275 */ 276 static int _cx25821_stop_audio_dma(struct cx25821_audio_dev *chip) 277 { 278 struct cx25821_dev *dev = chip->dev; 279 280 /* stop dma */ 281 cx_clear(AUD_INT_DMA_CTL, 282 FLD_AUD_DST_A_RISC_EN | FLD_AUD_DST_A_FIFO_EN); 283 284 /* disable irqs */ 285 cx_clear(PCI_INT_MSK, PCI_MSK_AUD_INT); 286 cx_clear(AUD_A_INT_MSK, AUD_INT_OPC_ERR | AUD_INT_DN_SYNC | 287 AUD_INT_DN_RISCI2 | AUD_INT_DN_RISCI1); 288 289 return 0; 290 } 291 292 #define MAX_IRQ_LOOP 50 293 294 /* 295 * BOARD Specific: IRQ dma bits 296 */ 297 static char *cx25821_aud_irqs[32] = { 298 "dn_risci1", "up_risci1", "rds_dn_risc1", /* 0-2 */ 299 NULL, /* reserved */ 300 "dn_risci2", "up_risci2", "rds_dn_risc2", /* 4-6 */ 301 NULL, /* reserved */ 302 "dnf_of", "upf_uf", "rds_dnf_uf", /* 8-10 */ 303 NULL, /* reserved */ 304 "dn_sync", "up_sync", "rds_dn_sync", /* 12-14 */ 305 NULL, /* reserved */ 306 "opc_err", "par_err", "rip_err", /* 16-18 */ 307 "pci_abort", "ber_irq", "mchg_irq" /* 19-21 */ 308 }; 309 310 /* 311 * BOARD Specific: Threats IRQ audio specific calls 312 */ 313 static void cx25821_aud_irq(struct cx25821_audio_dev *chip, u32 status, 314 u32 mask) 315 { 316 struct cx25821_dev *dev = chip->dev; 317 318 if (0 == (status & mask)) 319 return; 320 321 cx_write(AUD_A_INT_STAT, status); 322 if (debug > 1 || (status & mask & ~0xff)) 323 cx25821_print_irqbits(dev->name, "irq aud", cx25821_aud_irqs, 324 ARRAY_SIZE(cx25821_aud_irqs), status, mask); 325 326 /* risc op code error */ 327 if (status & AUD_INT_OPC_ERR) { 328 pr_warn("WARNING %s/1: Audio risc op code error\n", dev->name); 329 330 cx_clear(AUD_INT_DMA_CTL, 331 FLD_AUD_DST_A_RISC_EN | FLD_AUD_DST_A_FIFO_EN); 332 cx25821_sram_channel_dump_audio(dev, 333 &cx25821_sram_channels[AUDIO_SRAM_CHANNEL]); 334 } 335 if (status & AUD_INT_DN_SYNC) { 336 pr_warn("WARNING %s: Downstream sync error!\n", dev->name); 337 cx_write(AUD_A_GPCNT_CTL, GP_COUNT_CONTROL_RESET); 338 return; 339 } 340 341 /* risc1 downstream */ 342 if (status & AUD_INT_DN_RISCI1) { 343 atomic_set(&chip->count, cx_read(AUD_A_GPCNT)); 344 snd_pcm_period_elapsed(chip->substream); 345 } 346 } 347 348 /* 349 * BOARD Specific: Handles IRQ calls 350 */ 351 static irqreturn_t cx25821_irq(int irq, void *dev_id) 352 { 353 struct cx25821_audio_dev *chip = dev_id; 354 struct cx25821_dev *dev = chip->dev; 355 u32 status, pci_status; 356 u32 audint_status, audint_mask; 357 int loop, handled = 0; 358 359 audint_status = cx_read(AUD_A_INT_STAT); 360 audint_mask = cx_read(AUD_A_INT_MSK); 361 status = cx_read(PCI_INT_STAT); 362 363 for (loop = 0; loop < 1; loop++) { 364 status = cx_read(PCI_INT_STAT); 365 if (0 == status) { 366 status = cx_read(PCI_INT_STAT); 367 audint_status = cx_read(AUD_A_INT_STAT); 368 audint_mask = cx_read(AUD_A_INT_MSK); 369 370 if (status) { 371 handled = 1; 372 cx_write(PCI_INT_STAT, status); 373 374 cx25821_aud_irq(chip, audint_status, 375 audint_mask); 376 break; 377 } else { 378 goto out; 379 } 380 } 381 382 handled = 1; 383 cx_write(PCI_INT_STAT, status); 384 385 cx25821_aud_irq(chip, audint_status, audint_mask); 386 } 387 388 pci_status = cx_read(PCI_INT_STAT); 389 390 if (handled) 391 cx_write(PCI_INT_STAT, pci_status); 392 393 out: 394 return IRQ_RETVAL(handled); 395 } 396 397 static int dsp_buffer_free(struct cx25821_audio_dev *chip) 398 { 399 struct cx25821_riscmem *risc = &chip->buf->risc; 400 401 BUG_ON(!chip->dma_size); 402 403 dprintk(2, "Freeing buffer\n"); 404 cx25821_alsa_dma_unmap(chip); 405 cx25821_alsa_dma_free(chip->buf); 406 pci_free_consistent(chip->pci, risc->size, risc->cpu, risc->dma); 407 kfree(chip->buf); 408 409 chip->buf = NULL; 410 chip->dma_size = 0; 411 412 return 0; 413 } 414 415 /**************************************************************************** 416 ALSA PCM Interface 417 ****************************************************************************/ 418 419 /* 420 * Digital hardware definition 421 */ 422 #define DEFAULT_FIFO_SIZE 384 423 static const struct snd_pcm_hardware snd_cx25821_digital_hw = { 424 .info = SNDRV_PCM_INFO_MMAP | SNDRV_PCM_INFO_INTERLEAVED | 425 SNDRV_PCM_INFO_BLOCK_TRANSFER | SNDRV_PCM_INFO_MMAP_VALID, 426 .formats = SNDRV_PCM_FMTBIT_S16_LE, 427 428 .rates = SNDRV_PCM_RATE_48000, 429 .rate_min = 48000, 430 .rate_max = 48000, 431 .channels_min = 2, 432 .channels_max = 2, 433 /* Analog audio output will be full of clicks and pops if there 434 are not exactly four lines in the SRAM FIFO buffer. */ 435 .period_bytes_min = DEFAULT_FIFO_SIZE / 3, 436 .period_bytes_max = DEFAULT_FIFO_SIZE / 3, 437 .periods_min = 1, 438 .periods_max = AUDIO_LINE_SIZE, 439 /* 128 * 128 = 16384 = 1024 * 16 */ 440 .buffer_bytes_max = (AUDIO_LINE_SIZE * AUDIO_LINE_SIZE), 441 }; 442 443 /* 444 * audio pcm capture open callback 445 */ 446 static int snd_cx25821_pcm_open(struct snd_pcm_substream *substream) 447 { 448 struct cx25821_audio_dev *chip = snd_pcm_substream_chip(substream); 449 struct snd_pcm_runtime *runtime = substream->runtime; 450 int err; 451 unsigned int bpl = 0; 452 453 if (!chip) { 454 pr_err("DEBUG: cx25821 can't find device struct. Can't proceed with open\n"); 455 return -ENODEV; 456 } 457 458 err = snd_pcm_hw_constraint_pow2(runtime, 0, 459 SNDRV_PCM_HW_PARAM_PERIODS); 460 if (err < 0) 461 goto _error; 462 463 chip->substream = substream; 464 465 runtime->hw = snd_cx25821_digital_hw; 466 467 if (cx25821_sram_channels[AUDIO_SRAM_CHANNEL].fifo_size != 468 DEFAULT_FIFO_SIZE) { 469 /* since there are 3 audio Clusters */ 470 bpl = cx25821_sram_channels[AUDIO_SRAM_CHANNEL].fifo_size / 3; 471 bpl &= ~7; /* must be multiple of 8 */ 472 473 if (bpl > AUDIO_LINE_SIZE) 474 bpl = AUDIO_LINE_SIZE; 475 476 runtime->hw.period_bytes_min = bpl; 477 runtime->hw.period_bytes_max = bpl; 478 } 479 480 return 0; 481 _error: 482 dprintk(1, "Error opening PCM!\n"); 483 return err; 484 } 485 486 /* 487 * audio close callback 488 */ 489 static int snd_cx25821_close(struct snd_pcm_substream *substream) 490 { 491 return 0; 492 } 493 494 /* 495 * hw_params callback 496 */ 497 static int snd_cx25821_hw_params(struct snd_pcm_substream *substream, 498 struct snd_pcm_hw_params *hw_params) 499 { 500 struct cx25821_audio_dev *chip = snd_pcm_substream_chip(substream); 501 struct cx25821_audio_buffer *buf; 502 int ret; 503 504 if (substream->runtime->dma_area) { 505 dsp_buffer_free(chip); 506 substream->runtime->dma_area = NULL; 507 } 508 509 chip->period_size = params_period_bytes(hw_params); 510 chip->num_periods = params_periods(hw_params); 511 chip->dma_size = chip->period_size * params_periods(hw_params); 512 513 BUG_ON(!chip->dma_size); 514 BUG_ON(chip->num_periods & (chip->num_periods - 1)); 515 516 buf = kzalloc(sizeof(*buf), GFP_KERNEL); 517 if (NULL == buf) 518 return -ENOMEM; 519 520 if (chip->period_size > AUDIO_LINE_SIZE) 521 chip->period_size = AUDIO_LINE_SIZE; 522 523 buf->bpl = chip->period_size; 524 chip->buf = buf; 525 526 ret = cx25821_alsa_dma_init(chip, 527 (PAGE_ALIGN(chip->dma_size) >> PAGE_SHIFT)); 528 if (ret < 0) 529 goto error; 530 531 ret = cx25821_alsa_dma_map(chip); 532 if (ret < 0) 533 goto error; 534 535 ret = cx25821_risc_databuffer_audio(chip->pci, &buf->risc, buf->sglist, 536 chip->period_size, chip->num_periods, 1); 537 if (ret < 0) { 538 pr_info("DEBUG: ERROR after cx25821_risc_databuffer_audio()\n"); 539 goto error; 540 } 541 542 /* Loop back to start of program */ 543 buf->risc.jmp[0] = cpu_to_le32(RISC_JUMP | RISC_IRQ1 | RISC_CNT_INC); 544 buf->risc.jmp[1] = cpu_to_le32(buf->risc.dma); 545 buf->risc.jmp[2] = cpu_to_le32(0); /* bits 63-32 */ 546 547 substream->runtime->dma_area = chip->buf->vaddr; 548 substream->runtime->dma_bytes = chip->dma_size; 549 substream->runtime->dma_addr = 0; 550 551 return 0; 552 553 error: 554 chip->buf = NULL; 555 kfree(buf); 556 return ret; 557 } 558 559 /* 560 * hw free callback 561 */ 562 static int snd_cx25821_hw_free(struct snd_pcm_substream *substream) 563 { 564 struct cx25821_audio_dev *chip = snd_pcm_substream_chip(substream); 565 566 if (substream->runtime->dma_area) { 567 dsp_buffer_free(chip); 568 substream->runtime->dma_area = NULL; 569 } 570 571 return 0; 572 } 573 574 /* 575 * prepare callback 576 */ 577 static int snd_cx25821_prepare(struct snd_pcm_substream *substream) 578 { 579 return 0; 580 } 581 582 /* 583 * trigger callback 584 */ 585 static int snd_cx25821_card_trigger(struct snd_pcm_substream *substream, 586 int cmd) 587 { 588 struct cx25821_audio_dev *chip = snd_pcm_substream_chip(substream); 589 int err = 0; 590 591 /* Local interrupts are already disabled by ALSA */ 592 spin_lock(&chip->reg_lock); 593 594 switch (cmd) { 595 case SNDRV_PCM_TRIGGER_START: 596 err = _cx25821_start_audio_dma(chip); 597 break; 598 case SNDRV_PCM_TRIGGER_STOP: 599 err = _cx25821_stop_audio_dma(chip); 600 break; 601 default: 602 err = -EINVAL; 603 break; 604 } 605 606 spin_unlock(&chip->reg_lock); 607 608 return err; 609 } 610 611 /* 612 * pointer callback 613 */ 614 static snd_pcm_uframes_t snd_cx25821_pointer(struct snd_pcm_substream 615 *substream) 616 { 617 struct cx25821_audio_dev *chip = snd_pcm_substream_chip(substream); 618 struct snd_pcm_runtime *runtime = substream->runtime; 619 u16 count; 620 621 count = atomic_read(&chip->count); 622 623 return runtime->period_size * (count & (runtime->periods - 1)); 624 } 625 626 /* 627 * page callback (needed for mmap) 628 */ 629 static struct page *snd_cx25821_page(struct snd_pcm_substream *substream, 630 unsigned long offset) 631 { 632 void *pageptr = substream->runtime->dma_area + offset; 633 634 return vmalloc_to_page(pageptr); 635 } 636 637 /* 638 * operators 639 */ 640 static const struct snd_pcm_ops snd_cx25821_pcm_ops = { 641 .open = snd_cx25821_pcm_open, 642 .close = snd_cx25821_close, 643 .hw_params = snd_cx25821_hw_params, 644 .hw_free = snd_cx25821_hw_free, 645 .prepare = snd_cx25821_prepare, 646 .trigger = snd_cx25821_card_trigger, 647 .pointer = snd_cx25821_pointer, 648 .page = snd_cx25821_page, 649 }; 650 651 /* 652 * ALSA create a PCM device: Called when initializing the board. 653 * Sets up the name and hooks up the callbacks 654 */ 655 static int snd_cx25821_pcm(struct cx25821_audio_dev *chip, int device, 656 char *name) 657 { 658 struct snd_pcm *pcm; 659 int err; 660 661 err = snd_pcm_new(chip->card, name, device, 0, 1, &pcm); 662 if (err < 0) { 663 pr_info("ERROR: FAILED snd_pcm_new() in %s\n", __func__); 664 return err; 665 } 666 pcm->private_data = chip; 667 pcm->info_flags = 0; 668 strscpy(pcm->name, name, sizeof(pcm->name)); 669 snd_pcm_set_ops(pcm, SNDRV_PCM_STREAM_CAPTURE, &snd_cx25821_pcm_ops); 670 671 return 0; 672 } 673 674 /**************************************************************************** 675 Basic Flow for Sound Devices 676 ****************************************************************************/ 677 678 /* 679 * PCI ID Table - 14f1:8801 and 14f1:8811 means function 1: Audio 680 * Only boards with eeprom and byte 1 at eeprom=1 have it 681 */ 682 683 static const struct pci_device_id __maybe_unused cx25821_audio_pci_tbl[] = { 684 {0x14f1, 0x0920, PCI_ANY_ID, PCI_ANY_ID, 0, 0, 0}, 685 {0,} 686 }; 687 688 MODULE_DEVICE_TABLE(pci, cx25821_audio_pci_tbl); 689 690 /* 691 * Alsa Constructor - Component probe 692 */ 693 static int cx25821_audio_initdev(struct cx25821_dev *dev) 694 { 695 struct snd_card *card; 696 struct cx25821_audio_dev *chip; 697 int err; 698 699 if (devno >= SNDRV_CARDS) { 700 pr_info("DEBUG ERROR: devno >= SNDRV_CARDS %s\n", __func__); 701 return -ENODEV; 702 } 703 704 if (!enable[devno]) { 705 ++devno; 706 pr_info("DEBUG ERROR: !enable[devno] %s\n", __func__); 707 return -ENOENT; 708 } 709 710 err = snd_card_new(&dev->pci->dev, index[devno], id[devno], 711 THIS_MODULE, 712 sizeof(struct cx25821_audio_dev), &card); 713 if (err < 0) { 714 pr_info("DEBUG ERROR: cannot create snd_card_new in %s\n", 715 __func__); 716 return err; 717 } 718 719 strscpy(card->driver, "cx25821", sizeof(card->driver)); 720 721 /* Card "creation" */ 722 chip = card->private_data; 723 spin_lock_init(&chip->reg_lock); 724 725 chip->dev = dev; 726 chip->card = card; 727 chip->pci = dev->pci; 728 chip->iobase = pci_resource_start(dev->pci, 0); 729 730 chip->irq = dev->pci->irq; 731 732 err = request_irq(dev->pci->irq, cx25821_irq, 733 IRQF_SHARED, chip->dev->name, chip); 734 735 if (err < 0) { 736 pr_err("ERROR %s: can't get IRQ %d for ALSA\n", chip->dev->name, 737 dev->pci->irq); 738 goto error; 739 } 740 741 err = snd_cx25821_pcm(chip, 0, "cx25821 Digital"); 742 if (err < 0) { 743 pr_info("DEBUG ERROR: cannot create snd_cx25821_pcm %s\n", 744 __func__); 745 goto error; 746 } 747 748 strscpy(card->shortname, "cx25821", sizeof(card->shortname)); 749 sprintf(card->longname, "%s at 0x%lx irq %d", chip->dev->name, 750 chip->iobase, chip->irq); 751 strscpy(card->mixername, "CX25821", sizeof(card->mixername)); 752 753 pr_info("%s/%i: ALSA support for cx25821 boards\n", card->driver, 754 devno); 755 756 err = snd_card_register(card); 757 if (err < 0) { 758 pr_info("DEBUG ERROR: cannot register sound card %s\n", 759 __func__); 760 goto error; 761 } 762 763 dev->card = card; 764 devno++; 765 return 0; 766 767 error: 768 snd_card_free(card); 769 return err; 770 } 771 772 /**************************************************************************** 773 LINUX MODULE INIT 774 ****************************************************************************/ 775 776 static int cx25821_alsa_exit_callback(struct device *dev, void *data) 777 { 778 struct v4l2_device *v4l2_dev = dev_get_drvdata(dev); 779 struct cx25821_dev *cxdev = get_cx25821(v4l2_dev); 780 781 snd_card_free(cxdev->card); 782 return 0; 783 } 784 785 static void cx25821_audio_fini(void) 786 { 787 struct device_driver *drv = driver_find("cx25821", &pci_bus_type); 788 int ret; 789 790 ret = driver_for_each_device(drv, NULL, NULL, cx25821_alsa_exit_callback); 791 if (ret) 792 pr_err("%s failed to find a cx25821 driver.\n", __func__); 793 } 794 795 static int cx25821_alsa_init_callback(struct device *dev, void *data) 796 { 797 struct v4l2_device *v4l2_dev = dev_get_drvdata(dev); 798 struct cx25821_dev *cxdev = get_cx25821(v4l2_dev); 799 800 cx25821_audio_initdev(cxdev); 801 return 0; 802 } 803 804 /* 805 * Module initializer 806 * 807 * Loops through present saa7134 cards, and assigns an ALSA device 808 * to each one 809 * 810 */ 811 static int cx25821_alsa_init(void) 812 { 813 struct device_driver *drv = driver_find("cx25821", &pci_bus_type); 814 815 return driver_for_each_device(drv, NULL, NULL, cx25821_alsa_init_callback); 816 817 } 818 819 late_initcall(cx25821_alsa_init); 820 module_exit(cx25821_audio_fini); 821