1 /* 2 * Driver for the Conexant CX25821 PCIe bridge 3 * 4 * Copyright (C) 2009 Conexant Systems Inc. 5 * Authors <shu.lin@conexant.com>, <hiep.huynh@conexant.com> 6 * Based on SAA713x ALSA driver and CX88 driver 7 * 8 * This program is free software; you can redistribute it and/or modify 9 * it under the terms of the GNU General Public License as published by 10 * the Free Software Foundation, version 2 11 * 12 * This program is distributed in the hope that it will be useful, 13 * but WITHOUT ANY WARRANTY; without even the implied warranty of 14 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the 15 * GNU General Public License for more details. 16 * 17 * You should have received a copy of the GNU General Public License 18 * along with this program; if not, write to the Free Software 19 * Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA 20 * 21 */ 22 23 #define pr_fmt(fmt) KBUILD_MODNAME ": " fmt 24 25 #include <linux/module.h> 26 #include <linux/init.h> 27 #include <linux/device.h> 28 #include <linux/interrupt.h> 29 #include <linux/vmalloc.h> 30 #include <linux/dma-mapping.h> 31 #include <linux/pci.h> 32 #include <linux/slab.h> 33 34 #include <linux/delay.h> 35 #include <sound/core.h> 36 #include <sound/pcm.h> 37 #include <sound/pcm_params.h> 38 #include <sound/control.h> 39 #include <sound/initval.h> 40 #include <sound/tlv.h> 41 42 #include "cx25821.h" 43 #include "cx25821-reg.h" 44 45 #define AUDIO_SRAM_CHANNEL SRAM_CH08 46 47 #define dprintk(level, fmt, arg...) \ 48 do { \ 49 if (debug >= level) \ 50 pr_info("%s/1: " fmt, chip->dev->name, ##arg); \ 51 } while (0) 52 #define dprintk_core(level, fmt, arg...) \ 53 do { \ 54 if (debug >= level) \ 55 printk(KERN_DEBUG "%s/1: " fmt, chip->dev->name, ##arg); \ 56 } while (0) 57 58 /**************************************************************************** 59 Data type declarations - Can be moded to a header file later 60 ****************************************************************************/ 61 62 static struct snd_card *snd_cx25821_cards[SNDRV_CARDS]; 63 static int devno; 64 65 struct cx25821_audio_buffer { 66 unsigned int bpl; 67 struct btcx_riscmem risc; 68 struct videobuf_dmabuf dma; 69 }; 70 71 struct cx25821_audio_dev { 72 struct cx25821_dev *dev; 73 struct cx25821_dmaqueue q; 74 75 /* pci i/o */ 76 struct pci_dev *pci; 77 78 /* audio controls */ 79 int irq; 80 81 struct snd_card *card; 82 83 unsigned long iobase; 84 spinlock_t reg_lock; 85 atomic_t count; 86 87 unsigned int dma_size; 88 unsigned int period_size; 89 unsigned int num_periods; 90 91 struct videobuf_dmabuf *dma_risc; 92 93 struct cx25821_audio_buffer *buf; 94 95 struct snd_pcm_substream *substream; 96 }; 97 98 99 /**************************************************************************** 100 Module global static vars 101 ****************************************************************************/ 102 103 static int index[SNDRV_CARDS] = SNDRV_DEFAULT_IDX; /* Index 0-MAX */ 104 static char *id[SNDRV_CARDS] = SNDRV_DEFAULT_STR; /* ID for this card */ 105 static bool enable[SNDRV_CARDS] = { 1, [1 ... (SNDRV_CARDS - 1)] = 1 }; 106 107 module_param_array(enable, bool, NULL, 0444); 108 MODULE_PARM_DESC(enable, "Enable cx25821 soundcard. default enabled."); 109 110 module_param_array(index, int, NULL, 0444); 111 MODULE_PARM_DESC(index, "Index value for cx25821 capture interface(s)."); 112 113 /**************************************************************************** 114 Module macros 115 ****************************************************************************/ 116 117 MODULE_DESCRIPTION("ALSA driver module for cx25821 based capture cards"); 118 MODULE_AUTHOR("Hiep Huynh"); 119 MODULE_LICENSE("GPL"); 120 MODULE_SUPPORTED_DEVICE("{{Conexant,25821}"); /* "{{Conexant,23881}," */ 121 122 static unsigned int debug; 123 module_param(debug, int, 0644); 124 MODULE_PARM_DESC(debug, "enable debug messages"); 125 126 /**************************************************************************** 127 Module specific funtions 128 ****************************************************************************/ 129 /* Constants taken from cx88-reg.h */ 130 #define AUD_INT_DN_RISCI1 (1 << 0) 131 #define AUD_INT_UP_RISCI1 (1 << 1) 132 #define AUD_INT_RDS_DN_RISCI1 (1 << 2) 133 #define AUD_INT_DN_RISCI2 (1 << 4) /* yes, 3 is skipped */ 134 #define AUD_INT_UP_RISCI2 (1 << 5) 135 #define AUD_INT_RDS_DN_RISCI2 (1 << 6) 136 #define AUD_INT_DN_SYNC (1 << 12) 137 #define AUD_INT_UP_SYNC (1 << 13) 138 #define AUD_INT_RDS_DN_SYNC (1 << 14) 139 #define AUD_INT_OPC_ERR (1 << 16) 140 #define AUD_INT_BER_IRQ (1 << 20) 141 #define AUD_INT_MCHG_IRQ (1 << 21) 142 #define GP_COUNT_CONTROL_RESET 0x3 143 144 #define PCI_MSK_AUD_EXT (1 << 4) 145 #define PCI_MSK_AUD_INT (1 << 3) 146 /* 147 * BOARD Specific: Sets audio DMA 148 */ 149 150 static int _cx25821_start_audio_dma(struct cx25821_audio_dev *chip) 151 { 152 struct cx25821_audio_buffer *buf = chip->buf; 153 struct cx25821_dev *dev = chip->dev; 154 struct sram_channel *audio_ch = 155 &cx25821_sram_channels[AUDIO_SRAM_CHANNEL]; 156 u32 tmp = 0; 157 158 /* enable output on the GPIO 0 for the MCLK ADC (Audio) */ 159 cx25821_set_gpiopin_direction(chip->dev, 0, 0); 160 161 /* Make sure RISC/FIFO are off before changing FIFO/RISC settings */ 162 cx_clear(AUD_INT_DMA_CTL, 163 FLD_AUD_DST_A_RISC_EN | FLD_AUD_DST_A_FIFO_EN); 164 165 /* setup fifo + format - out channel */ 166 cx25821_sram_channel_setup_audio(chip->dev, audio_ch, buf->bpl, 167 buf->risc.dma); 168 169 /* sets bpl size */ 170 cx_write(AUD_A_LNGTH, buf->bpl); 171 172 /* reset counter */ 173 /* GP_COUNT_CONTROL_RESET = 0x3 */ 174 cx_write(AUD_A_GPCNT_CTL, GP_COUNT_CONTROL_RESET); 175 atomic_set(&chip->count, 0); 176 177 /* Set the input mode to 16-bit */ 178 tmp = cx_read(AUD_A_CFG); 179 cx_write(AUD_A_CFG, tmp | FLD_AUD_DST_PK_MODE | FLD_AUD_DST_ENABLE | 180 FLD_AUD_CLK_ENABLE); 181 182 /* 183 pr_info("DEBUG: Start audio DMA, %d B/line, cmds_start(0x%x)= %d lines/FIFO, %d periods, %d byte buffer\n", 184 buf->bpl, audio_ch->cmds_start, 185 cx_read(audio_ch->cmds_start + 12)>>1, 186 chip->num_periods, buf->bpl * chip->num_periods); 187 */ 188 189 /* Enables corresponding bits at AUD_INT_STAT */ 190 cx_write(AUD_A_INT_MSK, FLD_AUD_DST_RISCI1 | FLD_AUD_DST_OF | 191 FLD_AUD_DST_SYNC | FLD_AUD_DST_OPC_ERR); 192 193 /* Clean any pending interrupt bits already set */ 194 cx_write(AUD_A_INT_STAT, ~0); 195 196 /* enable audio irqs */ 197 cx_set(PCI_INT_MSK, chip->dev->pci_irqmask | PCI_MSK_AUD_INT); 198 199 /* Turn on audio downstream fifo and risc enable 0x101 */ 200 tmp = cx_read(AUD_INT_DMA_CTL); 201 cx_set(AUD_INT_DMA_CTL, tmp | 202 (FLD_AUD_DST_A_RISC_EN | FLD_AUD_DST_A_FIFO_EN)); 203 204 mdelay(100); 205 return 0; 206 } 207 208 /* 209 * BOARD Specific: Resets audio DMA 210 */ 211 static int _cx25821_stop_audio_dma(struct cx25821_audio_dev *chip) 212 { 213 struct cx25821_dev *dev = chip->dev; 214 215 /* stop dma */ 216 cx_clear(AUD_INT_DMA_CTL, 217 FLD_AUD_DST_A_RISC_EN | FLD_AUD_DST_A_FIFO_EN); 218 219 /* disable irqs */ 220 cx_clear(PCI_INT_MSK, PCI_MSK_AUD_INT); 221 cx_clear(AUD_A_INT_MSK, AUD_INT_OPC_ERR | AUD_INT_DN_SYNC | 222 AUD_INT_DN_RISCI2 | AUD_INT_DN_RISCI1); 223 224 return 0; 225 } 226 227 #define MAX_IRQ_LOOP 50 228 229 /* 230 * BOARD Specific: IRQ dma bits 231 */ 232 static char *cx25821_aud_irqs[32] = { 233 "dn_risci1", "up_risci1", "rds_dn_risc1", /* 0-2 */ 234 NULL, /* reserved */ 235 "dn_risci2", "up_risci2", "rds_dn_risc2", /* 4-6 */ 236 NULL, /* reserved */ 237 "dnf_of", "upf_uf", "rds_dnf_uf", /* 8-10 */ 238 NULL, /* reserved */ 239 "dn_sync", "up_sync", "rds_dn_sync", /* 12-14 */ 240 NULL, /* reserved */ 241 "opc_err", "par_err", "rip_err", /* 16-18 */ 242 "pci_abort", "ber_irq", "mchg_irq" /* 19-21 */ 243 }; 244 245 /* 246 * BOARD Specific: Threats IRQ audio specific calls 247 */ 248 static void cx25821_aud_irq(struct cx25821_audio_dev *chip, u32 status, 249 u32 mask) 250 { 251 struct cx25821_dev *dev = chip->dev; 252 253 if (0 == (status & mask)) 254 return; 255 256 cx_write(AUD_A_INT_STAT, status); 257 if (debug > 1 || (status & mask & ~0xff)) 258 cx25821_print_irqbits(dev->name, "irq aud", cx25821_aud_irqs, 259 ARRAY_SIZE(cx25821_aud_irqs), status, mask); 260 261 /* risc op code error */ 262 if (status & AUD_INT_OPC_ERR) { 263 pr_warn("WARNING %s/1: Audio risc op code error\n", dev->name); 264 265 cx_clear(AUD_INT_DMA_CTL, 266 FLD_AUD_DST_A_RISC_EN | FLD_AUD_DST_A_FIFO_EN); 267 cx25821_sram_channel_dump_audio(dev, 268 &cx25821_sram_channels[AUDIO_SRAM_CHANNEL]); 269 } 270 if (status & AUD_INT_DN_SYNC) { 271 pr_warn("WARNING %s: Downstream sync error!\n", dev->name); 272 cx_write(AUD_A_GPCNT_CTL, GP_COUNT_CONTROL_RESET); 273 return; 274 } 275 276 /* risc1 downstream */ 277 if (status & AUD_INT_DN_RISCI1) { 278 atomic_set(&chip->count, cx_read(AUD_A_GPCNT)); 279 snd_pcm_period_elapsed(chip->substream); 280 } 281 } 282 283 /* 284 * BOARD Specific: Handles IRQ calls 285 */ 286 static irqreturn_t cx25821_irq(int irq, void *dev_id) 287 { 288 struct cx25821_audio_dev *chip = dev_id; 289 struct cx25821_dev *dev = chip->dev; 290 u32 status, pci_status; 291 u32 audint_status, audint_mask; 292 int loop, handled = 0; 293 294 audint_status = cx_read(AUD_A_INT_STAT); 295 audint_mask = cx_read(AUD_A_INT_MSK); 296 status = cx_read(PCI_INT_STAT); 297 298 for (loop = 0; loop < 1; loop++) { 299 status = cx_read(PCI_INT_STAT); 300 if (0 == status) { 301 status = cx_read(PCI_INT_STAT); 302 audint_status = cx_read(AUD_A_INT_STAT); 303 audint_mask = cx_read(AUD_A_INT_MSK); 304 305 if (status) { 306 handled = 1; 307 cx_write(PCI_INT_STAT, status); 308 309 cx25821_aud_irq(chip, audint_status, 310 audint_mask); 311 break; 312 } else { 313 goto out; 314 } 315 } 316 317 handled = 1; 318 cx_write(PCI_INT_STAT, status); 319 320 cx25821_aud_irq(chip, audint_status, audint_mask); 321 } 322 323 pci_status = cx_read(PCI_INT_STAT); 324 325 if (handled) 326 cx_write(PCI_INT_STAT, pci_status); 327 328 out: 329 return IRQ_RETVAL(handled); 330 } 331 332 static int dsp_buffer_free(struct cx25821_audio_dev *chip) 333 { 334 BUG_ON(!chip->dma_size); 335 336 dprintk(2, "Freeing buffer\n"); 337 videobuf_dma_unmap(&chip->pci->dev, chip->dma_risc); 338 videobuf_dma_free(chip->dma_risc); 339 btcx_riscmem_free(chip->pci, &chip->buf->risc); 340 kfree(chip->buf); 341 342 chip->dma_risc = NULL; 343 chip->dma_size = 0; 344 345 return 0; 346 } 347 348 /**************************************************************************** 349 ALSA PCM Interface 350 ****************************************************************************/ 351 352 /* 353 * Digital hardware definition 354 */ 355 #define DEFAULT_FIFO_SIZE 384 356 static struct snd_pcm_hardware snd_cx25821_digital_hw = { 357 .info = SNDRV_PCM_INFO_MMAP | SNDRV_PCM_INFO_INTERLEAVED | 358 SNDRV_PCM_INFO_BLOCK_TRANSFER | SNDRV_PCM_INFO_MMAP_VALID, 359 .formats = SNDRV_PCM_FMTBIT_S16_LE, 360 361 .rates = SNDRV_PCM_RATE_48000, 362 .rate_min = 48000, 363 .rate_max = 48000, 364 .channels_min = 2, 365 .channels_max = 2, 366 /* Analog audio output will be full of clicks and pops if there 367 are not exactly four lines in the SRAM FIFO buffer. */ 368 .period_bytes_min = DEFAULT_FIFO_SIZE / 3, 369 .period_bytes_max = DEFAULT_FIFO_SIZE / 3, 370 .periods_min = 1, 371 .periods_max = AUDIO_LINE_SIZE, 372 /* 128 * 128 = 16384 = 1024 * 16 */ 373 .buffer_bytes_max = (AUDIO_LINE_SIZE * AUDIO_LINE_SIZE), 374 }; 375 376 /* 377 * audio pcm capture open callback 378 */ 379 static int snd_cx25821_pcm_open(struct snd_pcm_substream *substream) 380 { 381 struct cx25821_audio_dev *chip = snd_pcm_substream_chip(substream); 382 struct snd_pcm_runtime *runtime = substream->runtime; 383 int err; 384 unsigned int bpl = 0; 385 386 if (!chip) { 387 pr_err("DEBUG: cx25821 can't find device struct. Can't proceed with open\n"); 388 return -ENODEV; 389 } 390 391 err = snd_pcm_hw_constraint_pow2(runtime, 0, 392 SNDRV_PCM_HW_PARAM_PERIODS); 393 if (err < 0) 394 goto _error; 395 396 chip->substream = substream; 397 398 runtime->hw = snd_cx25821_digital_hw; 399 400 if (cx25821_sram_channels[AUDIO_SRAM_CHANNEL].fifo_size != 401 DEFAULT_FIFO_SIZE) { 402 /* since there are 3 audio Clusters */ 403 bpl = cx25821_sram_channels[AUDIO_SRAM_CHANNEL].fifo_size / 3; 404 bpl &= ~7; /* must be multiple of 8 */ 405 406 if (bpl > AUDIO_LINE_SIZE) 407 bpl = AUDIO_LINE_SIZE; 408 409 runtime->hw.period_bytes_min = bpl; 410 runtime->hw.period_bytes_max = bpl; 411 } 412 413 return 0; 414 _error: 415 dprintk(1, "Error opening PCM!\n"); 416 return err; 417 } 418 419 /* 420 * audio close callback 421 */ 422 static int snd_cx25821_close(struct snd_pcm_substream *substream) 423 { 424 return 0; 425 } 426 427 /* 428 * hw_params callback 429 */ 430 static int snd_cx25821_hw_params(struct snd_pcm_substream *substream, 431 struct snd_pcm_hw_params *hw_params) 432 { 433 struct cx25821_audio_dev *chip = snd_pcm_substream_chip(substream); 434 struct videobuf_dmabuf *dma; 435 436 struct cx25821_audio_buffer *buf; 437 int ret; 438 439 if (substream->runtime->dma_area) { 440 dsp_buffer_free(chip); 441 substream->runtime->dma_area = NULL; 442 } 443 444 chip->period_size = params_period_bytes(hw_params); 445 chip->num_periods = params_periods(hw_params); 446 chip->dma_size = chip->period_size * params_periods(hw_params); 447 448 BUG_ON(!chip->dma_size); 449 BUG_ON(chip->num_periods & (chip->num_periods - 1)); 450 451 buf = kzalloc(sizeof(*buf), GFP_KERNEL); 452 if (NULL == buf) 453 return -ENOMEM; 454 455 if (chip->period_size > AUDIO_LINE_SIZE) 456 chip->period_size = AUDIO_LINE_SIZE; 457 458 buf->bpl = chip->period_size; 459 460 dma = &buf->dma; 461 videobuf_dma_init(dma); 462 ret = videobuf_dma_init_kernel(dma, PCI_DMA_FROMDEVICE, 463 (PAGE_ALIGN(chip->dma_size) >> PAGE_SHIFT)); 464 if (ret < 0) 465 goto error; 466 467 ret = videobuf_dma_map(&chip->pci->dev, dma); 468 if (ret < 0) 469 goto error; 470 471 ret = cx25821_risc_databuffer_audio(chip->pci, &buf->risc, dma->sglist, 472 chip->period_size, chip->num_periods, 1); 473 if (ret < 0) { 474 pr_info("DEBUG: ERROR after cx25821_risc_databuffer_audio()\n"); 475 goto error; 476 } 477 478 /* Loop back to start of program */ 479 buf->risc.jmp[0] = cpu_to_le32(RISC_JUMP | RISC_IRQ1 | RISC_CNT_INC); 480 buf->risc.jmp[1] = cpu_to_le32(buf->risc.dma); 481 buf->risc.jmp[2] = cpu_to_le32(0); /* bits 63-32 */ 482 483 chip->buf = buf; 484 chip->dma_risc = dma; 485 486 substream->runtime->dma_area = chip->dma_risc->vaddr; 487 substream->runtime->dma_bytes = chip->dma_size; 488 substream->runtime->dma_addr = 0; 489 490 return 0; 491 492 error: 493 kfree(buf); 494 return ret; 495 } 496 497 /* 498 * hw free callback 499 */ 500 static int snd_cx25821_hw_free(struct snd_pcm_substream *substream) 501 { 502 struct cx25821_audio_dev *chip = snd_pcm_substream_chip(substream); 503 504 if (substream->runtime->dma_area) { 505 dsp_buffer_free(chip); 506 substream->runtime->dma_area = NULL; 507 } 508 509 return 0; 510 } 511 512 /* 513 * prepare callback 514 */ 515 static int snd_cx25821_prepare(struct snd_pcm_substream *substream) 516 { 517 return 0; 518 } 519 520 /* 521 * trigger callback 522 */ 523 static int snd_cx25821_card_trigger(struct snd_pcm_substream *substream, 524 int cmd) 525 { 526 struct cx25821_audio_dev *chip = snd_pcm_substream_chip(substream); 527 int err = 0; 528 529 /* Local interrupts are already disabled by ALSA */ 530 spin_lock(&chip->reg_lock); 531 532 switch (cmd) { 533 case SNDRV_PCM_TRIGGER_START: 534 err = _cx25821_start_audio_dma(chip); 535 break; 536 case SNDRV_PCM_TRIGGER_STOP: 537 err = _cx25821_stop_audio_dma(chip); 538 break; 539 default: 540 err = -EINVAL; 541 break; 542 } 543 544 spin_unlock(&chip->reg_lock); 545 546 return err; 547 } 548 549 /* 550 * pointer callback 551 */ 552 static snd_pcm_uframes_t snd_cx25821_pointer(struct snd_pcm_substream 553 *substream) 554 { 555 struct cx25821_audio_dev *chip = snd_pcm_substream_chip(substream); 556 struct snd_pcm_runtime *runtime = substream->runtime; 557 u16 count; 558 559 count = atomic_read(&chip->count); 560 561 return runtime->period_size * (count & (runtime->periods - 1)); 562 } 563 564 /* 565 * page callback (needed for mmap) 566 */ 567 static struct page *snd_cx25821_page(struct snd_pcm_substream *substream, 568 unsigned long offset) 569 { 570 void *pageptr = substream->runtime->dma_area + offset; 571 572 return vmalloc_to_page(pageptr); 573 } 574 575 /* 576 * operators 577 */ 578 static struct snd_pcm_ops snd_cx25821_pcm_ops = { 579 .open = snd_cx25821_pcm_open, 580 .close = snd_cx25821_close, 581 .ioctl = snd_pcm_lib_ioctl, 582 .hw_params = snd_cx25821_hw_params, 583 .hw_free = snd_cx25821_hw_free, 584 .prepare = snd_cx25821_prepare, 585 .trigger = snd_cx25821_card_trigger, 586 .pointer = snd_cx25821_pointer, 587 .page = snd_cx25821_page, 588 }; 589 590 /* 591 * ALSA create a PCM device: Called when initializing the board. 592 * Sets up the name and hooks up the callbacks 593 */ 594 static int snd_cx25821_pcm(struct cx25821_audio_dev *chip, int device, 595 char *name) 596 { 597 struct snd_pcm *pcm; 598 int err; 599 600 err = snd_pcm_new(chip->card, name, device, 0, 1, &pcm); 601 if (err < 0) { 602 pr_info("ERROR: FAILED snd_pcm_new() in %s\n", __func__); 603 return err; 604 } 605 pcm->private_data = chip; 606 pcm->info_flags = 0; 607 strcpy(pcm->name, name); 608 snd_pcm_set_ops(pcm, SNDRV_PCM_STREAM_CAPTURE, &snd_cx25821_pcm_ops); 609 610 return 0; 611 } 612 613 /**************************************************************************** 614 Basic Flow for Sound Devices 615 ****************************************************************************/ 616 617 /* 618 * PCI ID Table - 14f1:8801 and 14f1:8811 means function 1: Audio 619 * Only boards with eeprom and byte 1 at eeprom=1 have it 620 */ 621 622 static DEFINE_PCI_DEVICE_TABLE(cx25821_audio_pci_tbl) = { 623 {0x14f1, 0x0920, PCI_ANY_ID, PCI_ANY_ID, 0, 0, 0}, 624 {0,} 625 }; 626 627 MODULE_DEVICE_TABLE(pci, cx25821_audio_pci_tbl); 628 629 /* 630 * Not used in the function snd_cx25821_dev_free so removing 631 * from the file. 632 */ 633 /* 634 static int snd_cx25821_free(struct cx25821_audio_dev *chip) 635 { 636 if (chip->irq >= 0) 637 free_irq(chip->irq, chip); 638 639 cx25821_dev_unregister(chip->dev); 640 pci_disable_device(chip->pci); 641 642 return 0; 643 } 644 */ 645 646 /* 647 * Component Destructor 648 */ 649 static void snd_cx25821_dev_free(struct snd_card *card) 650 { 651 struct cx25821_audio_dev *chip = card->private_data; 652 653 /* snd_cx25821_free(chip); */ 654 snd_card_free(chip->card); 655 } 656 657 /* 658 * Alsa Constructor - Component probe 659 */ 660 static int cx25821_audio_initdev(struct cx25821_dev *dev) 661 { 662 struct snd_card *card; 663 struct cx25821_audio_dev *chip; 664 int err; 665 666 if (devno >= SNDRV_CARDS) { 667 pr_info("DEBUG ERROR: devno >= SNDRV_CARDS %s\n", __func__); 668 return -ENODEV; 669 } 670 671 if (!enable[devno]) { 672 ++devno; 673 pr_info("DEBUG ERROR: !enable[devno] %s\n", __func__); 674 return -ENOENT; 675 } 676 677 err = snd_card_create(index[devno], id[devno], THIS_MODULE, 678 sizeof(struct cx25821_audio_dev), &card); 679 if (err < 0) { 680 pr_info("DEBUG ERROR: cannot create snd_card_new in %s\n", 681 __func__); 682 return err; 683 } 684 685 strcpy(card->driver, "cx25821"); 686 687 /* Card "creation" */ 688 card->private_free = snd_cx25821_dev_free; 689 chip = card->private_data; 690 spin_lock_init(&chip->reg_lock); 691 692 chip->dev = dev; 693 chip->card = card; 694 chip->pci = dev->pci; 695 chip->iobase = pci_resource_start(dev->pci, 0); 696 697 chip->irq = dev->pci->irq; 698 699 err = request_irq(dev->pci->irq, cx25821_irq, 700 IRQF_SHARED, chip->dev->name, chip); 701 702 if (err < 0) { 703 pr_err("ERROR %s: can't get IRQ %d for ALSA\n", chip->dev->name, 704 dev->pci->irq); 705 goto error; 706 } 707 708 err = snd_cx25821_pcm(chip, 0, "cx25821 Digital"); 709 if (err < 0) { 710 pr_info("DEBUG ERROR: cannot create snd_cx25821_pcm %s\n", 711 __func__); 712 goto error; 713 } 714 715 snd_card_set_dev(card, &chip->pci->dev); 716 717 strcpy(card->shortname, "cx25821"); 718 sprintf(card->longname, "%s at 0x%lx irq %d", chip->dev->name, 719 chip->iobase, chip->irq); 720 strcpy(card->mixername, "CX25821"); 721 722 pr_info("%s/%i: ALSA support for cx25821 boards\n", card->driver, 723 devno); 724 725 err = snd_card_register(card); 726 if (err < 0) { 727 pr_info("DEBUG ERROR: cannot register sound card %s\n", 728 __func__); 729 goto error; 730 } 731 732 snd_cx25821_cards[devno] = card; 733 734 devno++; 735 return 0; 736 737 error: 738 snd_card_free(card); 739 return err; 740 } 741 742 /**************************************************************************** 743 LINUX MODULE INIT 744 ****************************************************************************/ 745 static void cx25821_audio_fini(void) 746 { 747 snd_card_free(snd_cx25821_cards[0]); 748 } 749 750 /* 751 * Module initializer 752 * 753 * Loops through present saa7134 cards, and assigns an ALSA device 754 * to each one 755 * 756 */ 757 static int cx25821_alsa_init(void) 758 { 759 struct cx25821_dev *dev = NULL; 760 struct list_head *list; 761 762 mutex_lock(&cx25821_devlist_mutex); 763 list_for_each(list, &cx25821_devlist) { 764 dev = list_entry(list, struct cx25821_dev, devlist); 765 cx25821_audio_initdev(dev); 766 } 767 mutex_unlock(&cx25821_devlist_mutex); 768 769 if (dev == NULL) 770 pr_info("ERROR ALSA: no cx25821 cards found\n"); 771 772 return 0; 773 774 } 775 776 late_initcall(cx25821_alsa_init); 777 module_exit(cx25821_audio_fini); 778 779 /* ----------------------------------------------------------- */ 780 /* 781 * Local variables: 782 * c-basic-offset: 8 783 * End: 784 */ 785