1// SPDX-License-Identifier: GPL-2.0-only 2/* 3 * SAA713x ALSA support for V4L 4 */ 5 6#include "saa7134.h" 7#include "saa7134-reg.h" 8 9#include <linux/init.h> 10#include <linux/slab.h> 11#include <linux/time.h> 12#include <linux/wait.h> 13#include <linux/module.h> 14#include <sound/core.h> 15#include <sound/control.h> 16#include <sound/pcm.h> 17#include <sound/pcm_params.h> 18#include <sound/initval.h> 19#include <linux/interrupt.h> 20#include <linux/vmalloc.h> 21 22/* 23 * Configuration macros 24 */ 25 26/* defaults */ 27#define MIXER_ADDR_UNSELECTED -1 28#define MIXER_ADDR_TVTUNER 0 29#define MIXER_ADDR_LINE1 1 30#define MIXER_ADDR_LINE2 2 31#define MIXER_ADDR_LAST 2 32 33 34static int index[SNDRV_CARDS] = SNDRV_DEFAULT_IDX; /* Index 0-MAX */ 35static char *id[SNDRV_CARDS] = SNDRV_DEFAULT_STR; /* ID for this card */ 36static int enable[SNDRV_CARDS] = {1, [1 ... (SNDRV_CARDS - 1)] = 1}; 37 38module_param_array(index, int, NULL, 0444); 39module_param_array(enable, int, NULL, 0444); 40MODULE_PARM_DESC(index, "Index value for SAA7134 capture interface(s)."); 41MODULE_PARM_DESC(enable, "Enable (or not) the SAA7134 capture interface(s)."); 42 43/* 44 * Main chip structure 45 */ 46 47typedef struct snd_card_saa7134 { 48 struct snd_card *card; 49 spinlock_t mixer_lock; 50 int mixer_volume[MIXER_ADDR_LAST+1][2]; 51 int capture_source_addr; 52 int capture_source[2]; 53 struct snd_kcontrol *capture_ctl[MIXER_ADDR_LAST+1]; 54 struct pci_dev *pci; 55 struct saa7134_dev *dev; 56 57 unsigned long iobase; 58 s16 irq; 59 u16 mute_was_on; 60 61 spinlock_t lock; 62} snd_card_saa7134_t; 63 64 65/* 66 * PCM structure 67 */ 68 69typedef struct snd_card_saa7134_pcm { 70 struct saa7134_dev *dev; 71 72 spinlock_t lock; 73 74 struct snd_pcm_substream *substream; 75} snd_card_saa7134_pcm_t; 76 77static struct snd_card *snd_saa7134_cards[SNDRV_CARDS]; 78 79 80/* 81 * saa7134 DMA audio stop 82 * 83 * Called when the capture device is released or the buffer overflows 84 * 85 * - Copied verbatim from saa7134-oss's dsp_dma_stop. 86 * 87 */ 88 89static void saa7134_dma_stop(struct saa7134_dev *dev) 90{ 91 dev->dmasound.dma_blk = -1; 92 dev->dmasound.dma_running = 0; 93 saa7134_set_dmabits(dev); 94} 95 96/* 97 * saa7134 DMA audio start 98 * 99 * Called when preparing the capture device for use 100 * 101 * - Copied verbatim from saa7134-oss's dsp_dma_start. 102 * 103 */ 104 105static void saa7134_dma_start(struct saa7134_dev *dev) 106{ 107 dev->dmasound.dma_blk = 0; 108 dev->dmasound.dma_running = 1; 109 saa7134_set_dmabits(dev); 110} 111 112/* 113 * saa7134 audio DMA IRQ handler 114 * 115 * Called whenever we get an SAA7134_IRQ_REPORT_DONE_RA3 interrupt 116 * Handles shifting between the 2 buffers, manages the read counters, 117 * and notifies ALSA when periods elapse 118 * 119 * - Mostly copied from saa7134-oss's saa7134_irq_oss_done. 120 * 121 */ 122 123static void saa7134_irq_alsa_done(struct saa7134_dev *dev, 124 unsigned long status) 125{ 126 int next_blk, reg = 0; 127 128 spin_lock(&dev->slock); 129 if (UNSET == dev->dmasound.dma_blk) { 130 pr_debug("irq: recording stopped\n"); 131 goto done; 132 } 133 if (0 != (status & 0x0f000000)) 134 pr_debug("irq: lost %ld\n", (status >> 24) & 0x0f); 135 if (0 == (status & 0x10000000)) { 136 /* odd */ 137 if (0 == (dev->dmasound.dma_blk & 0x01)) 138 reg = SAA7134_RS_BA1(6); 139 } else { 140 /* even */ 141 if (1 == (dev->dmasound.dma_blk & 0x01)) 142 reg = SAA7134_RS_BA2(6); 143 } 144 if (0 == reg) { 145 pr_debug("irq: field oops [%s]\n", 146 (status & 0x10000000) ? "even" : "odd"); 147 goto done; 148 } 149 150 if (dev->dmasound.read_count >= dev->dmasound.blksize * (dev->dmasound.blocks-2)) { 151 pr_debug("irq: overrun [full=%d/%d] - Blocks in %d\n", 152 dev->dmasound.read_count, 153 dev->dmasound.bufsize, dev->dmasound.blocks); 154 spin_unlock(&dev->slock); 155 snd_pcm_stop_xrun(dev->dmasound.substream); 156 return; 157 } 158 159 /* next block addr */ 160 next_blk = (dev->dmasound.dma_blk + 2) % dev->dmasound.blocks; 161 saa_writel(reg,next_blk * dev->dmasound.blksize); 162 pr_debug("irq: ok, %s, next_blk=%d, addr=%x, blocks=%u, size=%u, read=%u\n", 163 (status & 0x10000000) ? "even" : "odd ", next_blk, 164 next_blk * dev->dmasound.blksize, dev->dmasound.blocks, 165 dev->dmasound.blksize, dev->dmasound.read_count); 166 167 /* update status & wake waiting readers */ 168 dev->dmasound.dma_blk = (dev->dmasound.dma_blk + 1) % dev->dmasound.blocks; 169 dev->dmasound.read_count += dev->dmasound.blksize; 170 171 dev->dmasound.recording_on = reg; 172 173 if (dev->dmasound.read_count >= snd_pcm_lib_period_bytes(dev->dmasound.substream)) { 174 spin_unlock(&dev->slock); 175 snd_pcm_period_elapsed(dev->dmasound.substream); 176 spin_lock(&dev->slock); 177 } 178 179 done: 180 spin_unlock(&dev->slock); 181 182} 183 184/* 185 * IRQ request handler 186 * 187 * Runs along with saa7134's IRQ handler, discards anything that isn't 188 * DMA sound 189 * 190 */ 191 192static irqreturn_t saa7134_alsa_irq(int irq, void *dev_id) 193{ 194 struct saa7134_dmasound *dmasound = dev_id; 195 struct saa7134_dev *dev = dmasound->priv_data; 196 197 unsigned long report, status; 198 int loop, handled = 0; 199 200 for (loop = 0; loop < 10; loop++) { 201 report = saa_readl(SAA7134_IRQ_REPORT); 202 status = saa_readl(SAA7134_IRQ_STATUS); 203 204 if (report & SAA7134_IRQ_REPORT_DONE_RA3) { 205 handled = 1; 206 saa_writel(SAA7134_IRQ_REPORT, 207 SAA7134_IRQ_REPORT_DONE_RA3); 208 saa7134_irq_alsa_done(dev, status); 209 } else { 210 goto out; 211 } 212 } 213 214 if (loop == 10) { 215 pr_debug("error! looping IRQ!"); 216 } 217 218out: 219 return IRQ_RETVAL(handled); 220} 221 222/* 223 * ALSA capture trigger 224 * 225 * - One of the ALSA capture callbacks. 226 * 227 * Called whenever a capture is started or stopped. Must be defined, 228 * but there's nothing we want to do here 229 * 230 */ 231 232static int snd_card_saa7134_capture_trigger(struct snd_pcm_substream * substream, 233 int cmd) 234{ 235 struct snd_pcm_runtime *runtime = substream->runtime; 236 snd_card_saa7134_pcm_t *pcm = runtime->private_data; 237 struct saa7134_dev *dev=pcm->dev; 238 int err = 0; 239 240 spin_lock(&dev->slock); 241 if (cmd == SNDRV_PCM_TRIGGER_START) { 242 /* start dma */ 243 saa7134_dma_start(dev); 244 } else if (cmd == SNDRV_PCM_TRIGGER_STOP) { 245 /* stop dma */ 246 saa7134_dma_stop(dev); 247 } else { 248 err = -EINVAL; 249 } 250 spin_unlock(&dev->slock); 251 252 return err; 253} 254 255static int saa7134_alsa_dma_init(struct saa7134_dev *dev, 256 unsigned long nr_pages) 257{ 258 struct saa7134_dmasound *dma = &dev->dmasound; 259 struct page *pg; 260 int i; 261 262 dma->vaddr = vmalloc_32(nr_pages << PAGE_SHIFT); 263 if (NULL == dma->vaddr) { 264 pr_debug("vmalloc_32(%lu pages) failed\n", nr_pages); 265 return -ENOMEM; 266 } 267 268 pr_debug("vmalloc is at addr %p, size=%lu\n", 269 dma->vaddr, nr_pages << PAGE_SHIFT); 270 271 memset(dma->vaddr, 0, nr_pages << PAGE_SHIFT); 272 dma->nr_pages = nr_pages; 273 274 dma->sglist = vzalloc(array_size(sizeof(*dma->sglist), dma->nr_pages)); 275 if (NULL == dma->sglist) 276 goto vzalloc_err; 277 278 sg_init_table(dma->sglist, dma->nr_pages); 279 for (i = 0; i < dma->nr_pages; i++) { 280 pg = vmalloc_to_page(dma->vaddr + i * PAGE_SIZE); 281 if (NULL == pg) 282 goto vmalloc_to_page_err; 283 sg_set_page(&dma->sglist[i], pg, PAGE_SIZE, 0); 284 } 285 return 0; 286 287vmalloc_to_page_err: 288 vfree(dma->sglist); 289 dma->sglist = NULL; 290vzalloc_err: 291 vfree(dma->vaddr); 292 dma->vaddr = NULL; 293 return -ENOMEM; 294} 295 296static int saa7134_alsa_dma_map(struct saa7134_dev *dev) 297{ 298 struct saa7134_dmasound *dma = &dev->dmasound; 299 300 dma->sglen = dma_map_sg(&dev->pci->dev, dma->sglist, 301 dma->nr_pages, DMA_FROM_DEVICE); 302 303 if (0 == dma->sglen) { 304 pr_warn("%s: saa7134_alsa_map_sg failed\n", __func__); 305 return -ENOMEM; 306 } 307 return 0; 308} 309 310static int saa7134_alsa_dma_unmap(struct saa7134_dev *dev) 311{ 312 struct saa7134_dmasound *dma = &dev->dmasound; 313 314 if (!dma->sglen) 315 return 0; 316 317 dma_unmap_sg(&dev->pci->dev, dma->sglist, dma->nr_pages, DMA_FROM_DEVICE); 318 dma->sglen = 0; 319 return 0; 320} 321 322static int saa7134_alsa_dma_free(struct saa7134_dmasound *dma) 323{ 324 vfree(dma->sglist); 325 dma->sglist = NULL; 326 vfree(dma->vaddr); 327 dma->vaddr = NULL; 328 return 0; 329} 330 331/* 332 * DMA buffer initialization 333 * 334 * Uses V4L functions to initialize the DMA. Shouldn't be necessary in 335 * ALSA, but I was unable to use ALSA's own DMA, and had to force the 336 * usage of V4L's 337 * 338 * - Copied verbatim from saa7134-oss. 339 * 340 */ 341 342static int dsp_buffer_init(struct saa7134_dev *dev) 343{ 344 int err; 345 346 BUG_ON(!dev->dmasound.bufsize); 347 348 err = saa7134_alsa_dma_init(dev, 349 (dev->dmasound.bufsize + PAGE_SIZE) >> PAGE_SHIFT); 350 if (0 != err) 351 return err; 352 return 0; 353} 354 355/* 356 * DMA buffer release 357 * 358 * Called after closing the device, during snd_card_saa7134_capture_close 359 * 360 */ 361 362static int dsp_buffer_free(struct saa7134_dev *dev) 363{ 364 BUG_ON(!dev->dmasound.blksize); 365 366 saa7134_alsa_dma_free(&dev->dmasound); 367 368 dev->dmasound.blocks = 0; 369 dev->dmasound.blksize = 0; 370 dev->dmasound.bufsize = 0; 371 372 return 0; 373} 374 375/* 376 * Setting the capture source and updating the ALSA controls 377 */ 378static int snd_saa7134_capsrc_set(struct snd_kcontrol *kcontrol, 379 int left, int right, bool force_notify) 380{ 381 snd_card_saa7134_t *chip = snd_kcontrol_chip(kcontrol); 382 int change = 0, addr = kcontrol->private_value; 383 int active, old_addr; 384 u32 anabar, xbarin; 385 int analog_io, rate; 386 struct saa7134_dev *dev; 387 388 dev = chip->dev; 389 390 spin_lock_irq(&chip->mixer_lock); 391 392 active = left != 0 || right != 0; 393 old_addr = chip->capture_source_addr; 394 395 /* The active capture source cannot be deactivated */ 396 if (active) { 397 change = old_addr != addr || 398 chip->capture_source[0] != left || 399 chip->capture_source[1] != right; 400 401 chip->capture_source[0] = left; 402 chip->capture_source[1] = right; 403 chip->capture_source_addr = addr; 404 dev->dmasound.input = addr; 405 } 406 spin_unlock_irq(&chip->mixer_lock); 407 408 if (change) { 409 switch (dev->pci->device) { 410 411 case PCI_DEVICE_ID_PHILIPS_SAA7134: 412 switch (addr) { 413 case MIXER_ADDR_TVTUNER: 414 saa_andorb(SAA7134_AUDIO_FORMAT_CTRL, 415 0xc0, 0xc0); 416 saa_andorb(SAA7134_SIF_SAMPLE_FREQ, 417 0x03, 0x00); 418 break; 419 case MIXER_ADDR_LINE1: 420 case MIXER_ADDR_LINE2: 421 analog_io = (MIXER_ADDR_LINE1 == addr) ? 422 0x00 : 0x08; 423 rate = (32000 == dev->dmasound.rate) ? 424 0x01 : 0x03; 425 saa_andorb(SAA7134_ANALOG_IO_SELECT, 426 0x08, analog_io); 427 saa_andorb(SAA7134_AUDIO_FORMAT_CTRL, 428 0xc0, 0x80); 429 saa_andorb(SAA7134_SIF_SAMPLE_FREQ, 430 0x03, rate); 431 break; 432 } 433 434 break; 435 case PCI_DEVICE_ID_PHILIPS_SAA7133: 436 case PCI_DEVICE_ID_PHILIPS_SAA7135: 437 xbarin = 0x03; /* adc */ 438 anabar = 0; 439 switch (addr) { 440 case MIXER_ADDR_TVTUNER: 441 xbarin = 0; /* Demodulator */ 442 anabar = 2; /* DACs */ 443 break; 444 case MIXER_ADDR_LINE1: 445 anabar = 0; /* aux1, aux1 */ 446 break; 447 case MIXER_ADDR_LINE2: 448 anabar = 9; /* aux2, aux2 */ 449 break; 450 } 451 452 /* output xbar always main channel */ 453 saa_dsp_writel(dev, SAA7133_DIGITAL_OUTPUT_SEL1, 454 0xbbbb10); 455 456 if (left || right) { 457 /* We've got data, turn the input on */ 458 saa_dsp_writel(dev, SAA7133_DIGITAL_INPUT_XBAR1, 459 xbarin); 460 saa_writel(SAA7133_ANALOG_IO_SELECT, anabar); 461 } else { 462 saa_dsp_writel(dev, SAA7133_DIGITAL_INPUT_XBAR1, 463 0); 464 saa_writel(SAA7133_ANALOG_IO_SELECT, 0); 465 } 466 break; 467 } 468 } 469 470 if (change) { 471 if (force_notify) 472 snd_ctl_notify(chip->card, 473 SNDRV_CTL_EVENT_MASK_VALUE, 474 &chip->capture_ctl[addr]->id); 475 476 if (old_addr != MIXER_ADDR_UNSELECTED && old_addr != addr) 477 snd_ctl_notify(chip->card, 478 SNDRV_CTL_EVENT_MASK_VALUE, 479 &chip->capture_ctl[old_addr]->id); 480 } 481 482 return change; 483} 484 485/* 486 * ALSA PCM preparation 487 * 488 * - One of the ALSA capture callbacks. 489 * 490 * Called right after the capture device is opened, this function configures 491 * the buffer using the previously defined functions, allocates the memory, 492 * sets up the hardware registers, and then starts the DMA. When this function 493 * returns, the audio should be flowing. 494 * 495 */ 496 497static int snd_card_saa7134_capture_prepare(struct snd_pcm_substream * substream) 498{ 499 struct snd_pcm_runtime *runtime = substream->runtime; 500 int bswap, sign; 501 u32 fmt, control; 502 snd_card_saa7134_t *saa7134 = snd_pcm_substream_chip(substream); 503 struct saa7134_dev *dev; 504 snd_card_saa7134_pcm_t *pcm = runtime->private_data; 505 506 pcm->dev->dmasound.substream = substream; 507 508 dev = saa7134->dev; 509 510 if (snd_pcm_format_width(runtime->format) == 8) 511 fmt = 0x00; 512 else 513 fmt = 0x01; 514 515 if (snd_pcm_format_signed(runtime->format)) 516 sign = 1; 517 else 518 sign = 0; 519 520 if (snd_pcm_format_big_endian(runtime->format)) 521 bswap = 1; 522 else 523 bswap = 0; 524 525 switch (dev->pci->device) { 526 case PCI_DEVICE_ID_PHILIPS_SAA7134: 527 if (1 == runtime->channels) 528 fmt |= (1 << 3); 529 if (2 == runtime->channels) 530 fmt |= (3 << 3); 531 if (sign) 532 fmt |= 0x04; 533 534 fmt |= (MIXER_ADDR_TVTUNER == dev->dmasound.input) ? 0xc0 : 0x80; 535 saa_writeb(SAA7134_NUM_SAMPLES0, ((dev->dmasound.blksize - 1) & 0x0000ff)); 536 saa_writeb(SAA7134_NUM_SAMPLES1, ((dev->dmasound.blksize - 1) & 0x00ff00) >> 8); 537 saa_writeb(SAA7134_NUM_SAMPLES2, ((dev->dmasound.blksize - 1) & 0xff0000) >> 16); 538 saa_writeb(SAA7134_AUDIO_FORMAT_CTRL, fmt); 539 540 break; 541 case PCI_DEVICE_ID_PHILIPS_SAA7133: 542 case PCI_DEVICE_ID_PHILIPS_SAA7135: 543 if (1 == runtime->channels) 544 fmt |= (1 << 4); 545 if (2 == runtime->channels) 546 fmt |= (2 << 4); 547 if (!sign) 548 fmt |= 0x04; 549 saa_writel(SAA7133_NUM_SAMPLES, dev->dmasound.blksize -1); 550 saa_writel(SAA7133_AUDIO_CHANNEL, 0x543210 | (fmt << 24)); 551 break; 552 } 553 554 pr_debug("rec_start: afmt=%d ch=%d => fmt=0x%x swap=%c\n", 555 runtime->format, runtime->channels, fmt, 556 bswap ? 'b' : '-'); 557 /* dma: setup channel 6 (= AUDIO) */ 558 control = SAA7134_RS_CONTROL_BURST_16 | 559 SAA7134_RS_CONTROL_ME | 560 (dev->dmasound.pt.dma >> 12); 561 if (bswap) 562 control |= SAA7134_RS_CONTROL_BSWAP; 563 564 saa_writel(SAA7134_RS_BA1(6),0); 565 saa_writel(SAA7134_RS_BA2(6),dev->dmasound.blksize); 566 saa_writel(SAA7134_RS_PITCH(6),0); 567 saa_writel(SAA7134_RS_CONTROL(6),control); 568 569 dev->dmasound.rate = runtime->rate; 570 571 /* Setup and update the card/ALSA controls */ 572 snd_saa7134_capsrc_set(saa7134->capture_ctl[dev->dmasound.input], 1, 1, 573 true); 574 575 return 0; 576 577} 578 579/* 580 * ALSA pointer fetching 581 * 582 * - One of the ALSA capture callbacks. 583 * 584 * Called whenever a period elapses, it must return the current hardware 585 * position of the buffer. 586 * Also resets the read counter used to prevent overruns 587 * 588 */ 589 590static snd_pcm_uframes_t 591snd_card_saa7134_capture_pointer(struct snd_pcm_substream * substream) 592{ 593 struct snd_pcm_runtime *runtime = substream->runtime; 594 snd_card_saa7134_pcm_t *pcm = runtime->private_data; 595 struct saa7134_dev *dev=pcm->dev; 596 597 if (dev->dmasound.read_count) { 598 dev->dmasound.read_count -= snd_pcm_lib_period_bytes(substream); 599 dev->dmasound.read_offset += snd_pcm_lib_period_bytes(substream); 600 if (dev->dmasound.read_offset == dev->dmasound.bufsize) 601 dev->dmasound.read_offset = 0; 602 } 603 604 return bytes_to_frames(runtime, dev->dmasound.read_offset); 605} 606 607/* 608 * ALSA hardware capabilities definition 609 * 610 * Report only 32kHz for ALSA: 611 * 612 * - SAA7133/35 uses DDEP (DemDec Easy Programming mode), which works in 32kHz 613 * only 614 * - SAA7134 for TV mode uses DemDec mode (32kHz) 615 * - Radio works in 32kHz only 616 * - When recording 48kHz from Line1/Line2, switching of capture source to TV 617 * means 618 * switching to 32kHz without any frequency translation 619 */ 620 621static const struct snd_pcm_hardware snd_card_saa7134_capture = 622{ 623 .info = (SNDRV_PCM_INFO_MMAP | SNDRV_PCM_INFO_INTERLEAVED | 624 SNDRV_PCM_INFO_BLOCK_TRANSFER | 625 SNDRV_PCM_INFO_MMAP_VALID), 626 .formats = SNDRV_PCM_FMTBIT_S16_LE | \ 627 SNDRV_PCM_FMTBIT_S16_BE | \ 628 SNDRV_PCM_FMTBIT_S8 | \ 629 SNDRV_PCM_FMTBIT_U8 | \ 630 SNDRV_PCM_FMTBIT_U16_LE | \ 631 SNDRV_PCM_FMTBIT_U16_BE, 632 .rates = SNDRV_PCM_RATE_32000, 633 .rate_min = 32000, 634 .rate_max = 32000, 635 .channels_min = 1, 636 .channels_max = 2, 637 .buffer_bytes_max = (256*1024), 638 .period_bytes_min = 64, 639 .period_bytes_max = (256*1024), 640 .periods_min = 4, 641 .periods_max = 1024, 642}; 643 644static void snd_card_saa7134_runtime_free(struct snd_pcm_runtime *runtime) 645{ 646 snd_card_saa7134_pcm_t *pcm = runtime->private_data; 647 648 kfree(pcm); 649} 650 651 652/* 653 * ALSA hardware params 654 * 655 * - One of the ALSA capture callbacks. 656 * 657 * Called on initialization, right before the PCM preparation 658 * 659 */ 660 661static int snd_card_saa7134_hw_params(struct snd_pcm_substream * substream, 662 struct snd_pcm_hw_params * hw_params) 663{ 664 snd_card_saa7134_t *saa7134 = snd_pcm_substream_chip(substream); 665 struct saa7134_dev *dev; 666 unsigned int period_size, periods; 667 int err; 668 669 period_size = params_period_bytes(hw_params); 670 periods = params_periods(hw_params); 671 672 if (period_size < 0x100 || period_size > 0x10000) 673 return -EINVAL; 674 if (periods < 4) 675 return -EINVAL; 676 if (period_size * periods > 1024 * 1024) 677 return -EINVAL; 678 679 dev = saa7134->dev; 680 681 if (dev->dmasound.blocks == periods && 682 dev->dmasound.blksize == period_size) 683 return 0; 684 685 /* release the old buffer */ 686 if (substream->runtime->dma_area) { 687 saa7134_pgtable_free(dev->pci, &dev->dmasound.pt); 688 saa7134_alsa_dma_unmap(dev); 689 dsp_buffer_free(dev); 690 substream->runtime->dma_area = NULL; 691 } 692 dev->dmasound.blocks = periods; 693 dev->dmasound.blksize = period_size; 694 dev->dmasound.bufsize = period_size * periods; 695 696 err = dsp_buffer_init(dev); 697 if (0 != err) { 698 dev->dmasound.blocks = 0; 699 dev->dmasound.blksize = 0; 700 dev->dmasound.bufsize = 0; 701 return err; 702 } 703 704 err = saa7134_alsa_dma_map(dev); 705 if (err) { 706 dsp_buffer_free(dev); 707 return err; 708 } 709 err = saa7134_pgtable_alloc(dev->pci, &dev->dmasound.pt); 710 if (err) { 711 saa7134_alsa_dma_unmap(dev); 712 dsp_buffer_free(dev); 713 return err; 714 } 715 err = saa7134_pgtable_build(dev->pci, &dev->dmasound.pt, 716 dev->dmasound.sglist, dev->dmasound.sglen, 0); 717 if (err) { 718 saa7134_pgtable_free(dev->pci, &dev->dmasound.pt); 719 saa7134_alsa_dma_unmap(dev); 720 dsp_buffer_free(dev); 721 return err; 722 } 723 724 /* I should be able to use runtime->dma_addr in the control 725 byte, but it doesn't work. So I allocate the DMA using the 726 V4L functions, and force ALSA to use that as the DMA area */ 727 728 substream->runtime->dma_area = dev->dmasound.vaddr; 729 substream->runtime->dma_bytes = dev->dmasound.bufsize; 730 substream->runtime->dma_addr = 0; 731 732 return 0; 733 734} 735 736/* 737 * ALSA hardware release 738 * 739 * - One of the ALSA capture callbacks. 740 * 741 * Called after closing the device, but before snd_card_saa7134_capture_close 742 * It stops the DMA audio and releases the buffers. 743 * 744 */ 745 746static int snd_card_saa7134_hw_free(struct snd_pcm_substream * substream) 747{ 748 snd_card_saa7134_t *saa7134 = snd_pcm_substream_chip(substream); 749 struct saa7134_dev *dev; 750 751 dev = saa7134->dev; 752 753 if (substream->runtime->dma_area) { 754 saa7134_pgtable_free(dev->pci, &dev->dmasound.pt); 755 saa7134_alsa_dma_unmap(dev); 756 dsp_buffer_free(dev); 757 substream->runtime->dma_area = NULL; 758 } 759 760 return 0; 761} 762 763/* 764 * ALSA capture finish 765 * 766 * - One of the ALSA capture callbacks. 767 * 768 * Called after closing the device. 769 * 770 */ 771 772static int snd_card_saa7134_capture_close(struct snd_pcm_substream * substream) 773{ 774 snd_card_saa7134_t *saa7134 = snd_pcm_substream_chip(substream); 775 struct saa7134_dev *dev = saa7134->dev; 776 777 if (saa7134->mute_was_on) { 778 dev->ctl_mute = 1; 779 saa7134_tvaudio_setmute(dev); 780 } 781 return 0; 782} 783 784/* 785 * ALSA capture start 786 * 787 * - One of the ALSA capture callbacks. 788 * 789 * Called when opening the device. It creates and populates the PCM 790 * structure 791 * 792 */ 793 794static int snd_card_saa7134_capture_open(struct snd_pcm_substream * substream) 795{ 796 struct snd_pcm_runtime *runtime = substream->runtime; 797 snd_card_saa7134_pcm_t *pcm; 798 snd_card_saa7134_t *saa7134 = snd_pcm_substream_chip(substream); 799 struct saa7134_dev *dev; 800 int amux, err; 801 802 if (!saa7134) { 803 pr_err("BUG: saa7134 can't find device struct. Can't proceed with open\n"); 804 return -ENODEV; 805 } 806 dev = saa7134->dev; 807 mutex_lock(&dev->dmasound.lock); 808 809 dev->dmasound.read_count = 0; 810 dev->dmasound.read_offset = 0; 811 812 amux = dev->input->amux; 813 if ((amux < 1) || (amux > 3)) 814 amux = 1; 815 dev->dmasound.input = amux - 1; 816 817 mutex_unlock(&dev->dmasound.lock); 818 819 pcm = kzalloc(sizeof(*pcm), GFP_KERNEL); 820 if (pcm == NULL) 821 return -ENOMEM; 822 823 pcm->dev=saa7134->dev; 824 825 spin_lock_init(&pcm->lock); 826 827 pcm->substream = substream; 828 runtime->private_data = pcm; 829 runtime->private_free = snd_card_saa7134_runtime_free; 830 runtime->hw = snd_card_saa7134_capture; 831 832 if (dev->ctl_mute != 0) { 833 saa7134->mute_was_on = 1; 834 dev->ctl_mute = 0; 835 saa7134_tvaudio_setmute(dev); 836 } 837 838 err = snd_pcm_hw_constraint_integer(runtime, 839 SNDRV_PCM_HW_PARAM_PERIODS); 840 if (err < 0) 841 return err; 842 843 err = snd_pcm_hw_constraint_step(runtime, 0, 844 SNDRV_PCM_HW_PARAM_PERIODS, 2); 845 if (err < 0) 846 return err; 847 848 return 0; 849} 850 851/* 852 * page callback (needed for mmap) 853 */ 854 855static struct page *snd_card_saa7134_page(struct snd_pcm_substream *substream, 856 unsigned long offset) 857{ 858 void *pageptr = substream->runtime->dma_area + offset; 859 return vmalloc_to_page(pageptr); 860} 861 862/* 863 * ALSA capture callbacks definition 864 */ 865 866static const struct snd_pcm_ops snd_card_saa7134_capture_ops = { 867 .open = snd_card_saa7134_capture_open, 868 .close = snd_card_saa7134_capture_close, 869 .hw_params = snd_card_saa7134_hw_params, 870 .hw_free = snd_card_saa7134_hw_free, 871 .prepare = snd_card_saa7134_capture_prepare, 872 .trigger = snd_card_saa7134_capture_trigger, 873 .pointer = snd_card_saa7134_capture_pointer, 874 .page = snd_card_saa7134_page, 875}; 876 877/* 878 * ALSA PCM setup 879 * 880 * Called when initializing the board. Sets up the name and hooks up 881 * the callbacks 882 * 883 */ 884 885static int snd_card_saa7134_pcm(snd_card_saa7134_t *saa7134, int device) 886{ 887 struct snd_pcm *pcm; 888 int err; 889 890 if ((err = snd_pcm_new(saa7134->card, "SAA7134 PCM", device, 0, 1, &pcm)) < 0) 891 return err; 892 snd_pcm_set_ops(pcm, SNDRV_PCM_STREAM_CAPTURE, &snd_card_saa7134_capture_ops); 893 pcm->private_data = saa7134; 894 pcm->info_flags = 0; 895 strscpy(pcm->name, "SAA7134 PCM", sizeof(pcm->name)); 896 return 0; 897} 898 899#define SAA713x_VOLUME(xname, xindex, addr) \ 900{ .iface = SNDRV_CTL_ELEM_IFACE_MIXER, .name = xname, .index = xindex, \ 901 .info = snd_saa7134_volume_info, \ 902 .get = snd_saa7134_volume_get, .put = snd_saa7134_volume_put, \ 903 .private_value = addr } 904 905static int snd_saa7134_volume_info(struct snd_kcontrol * kcontrol, 906 struct snd_ctl_elem_info * uinfo) 907{ 908 uinfo->type = SNDRV_CTL_ELEM_TYPE_INTEGER; 909 uinfo->count = 2; 910 uinfo->value.integer.min = 0; 911 uinfo->value.integer.max = 20; 912 return 0; 913} 914 915static int snd_saa7134_volume_get(struct snd_kcontrol * kcontrol, 916 struct snd_ctl_elem_value * ucontrol) 917{ 918 snd_card_saa7134_t *chip = snd_kcontrol_chip(kcontrol); 919 int addr = kcontrol->private_value; 920 921 ucontrol->value.integer.value[0] = chip->mixer_volume[addr][0]; 922 ucontrol->value.integer.value[1] = chip->mixer_volume[addr][1]; 923 return 0; 924} 925 926static int snd_saa7134_volume_put(struct snd_kcontrol * kcontrol, 927 struct snd_ctl_elem_value * ucontrol) 928{ 929 snd_card_saa7134_t *chip = snd_kcontrol_chip(kcontrol); 930 struct saa7134_dev *dev = chip->dev; 931 932 int change, addr = kcontrol->private_value; 933 int left, right; 934 935 left = ucontrol->value.integer.value[0]; 936 if (left < 0) 937 left = 0; 938 if (left > 20) 939 left = 20; 940 right = ucontrol->value.integer.value[1]; 941 if (right < 0) 942 right = 0; 943 if (right > 20) 944 right = 20; 945 spin_lock_irq(&chip->mixer_lock); 946 change = 0; 947 if (chip->mixer_volume[addr][0] != left) { 948 change = 1; 949 right = left; 950 } 951 if (chip->mixer_volume[addr][1] != right) { 952 change = 1; 953 left = right; 954 } 955 if (change) { 956 switch (dev->pci->device) { 957 case PCI_DEVICE_ID_PHILIPS_SAA7134: 958 switch (addr) { 959 case MIXER_ADDR_TVTUNER: 960 left = 20; 961 break; 962 case MIXER_ADDR_LINE1: 963 saa_andorb(SAA7134_ANALOG_IO_SELECT, 0x10, 964 (left > 10) ? 0x00 : 0x10); 965 break; 966 case MIXER_ADDR_LINE2: 967 saa_andorb(SAA7134_ANALOG_IO_SELECT, 0x20, 968 (left > 10) ? 0x00 : 0x20); 969 break; 970 } 971 break; 972 case PCI_DEVICE_ID_PHILIPS_SAA7133: 973 case PCI_DEVICE_ID_PHILIPS_SAA7135: 974 switch (addr) { 975 case MIXER_ADDR_TVTUNER: 976 left = 20; 977 break; 978 case MIXER_ADDR_LINE1: 979 saa_andorb(0x0594, 0x10, 980 (left > 10) ? 0x00 : 0x10); 981 break; 982 case MIXER_ADDR_LINE2: 983 saa_andorb(0x0594, 0x20, 984 (left > 10) ? 0x00 : 0x20); 985 break; 986 } 987 break; 988 } 989 chip->mixer_volume[addr][0] = left; 990 chip->mixer_volume[addr][1] = right; 991 } 992 spin_unlock_irq(&chip->mixer_lock); 993 return change; 994} 995 996#define SAA713x_CAPSRC(xname, xindex, addr) \ 997{ .iface = SNDRV_CTL_ELEM_IFACE_MIXER, .name = xname, .index = xindex, \ 998 .info = snd_saa7134_capsrc_info, \ 999 .get = snd_saa7134_capsrc_get, .put = snd_saa7134_capsrc_put, \ 1000 .private_value = addr } 1001 1002static int snd_saa7134_capsrc_info(struct snd_kcontrol * kcontrol, 1003 struct snd_ctl_elem_info * uinfo) 1004{ 1005 uinfo->type = SNDRV_CTL_ELEM_TYPE_BOOLEAN; 1006 uinfo->count = 2; 1007 uinfo->value.integer.min = 0; 1008 uinfo->value.integer.max = 1; 1009 return 0; 1010} 1011 1012static int snd_saa7134_capsrc_get(struct snd_kcontrol * kcontrol, 1013 struct snd_ctl_elem_value * ucontrol) 1014{ 1015 snd_card_saa7134_t *chip = snd_kcontrol_chip(kcontrol); 1016 int addr = kcontrol->private_value; 1017 1018 spin_lock_irq(&chip->mixer_lock); 1019 if (chip->capture_source_addr == addr) { 1020 ucontrol->value.integer.value[0] = chip->capture_source[0]; 1021 ucontrol->value.integer.value[1] = chip->capture_source[1]; 1022 } else { 1023 ucontrol->value.integer.value[0] = 0; 1024 ucontrol->value.integer.value[1] = 0; 1025 } 1026 spin_unlock_irq(&chip->mixer_lock); 1027 1028 return 0; 1029} 1030 1031static int snd_saa7134_capsrc_put(struct snd_kcontrol * kcontrol, 1032 struct snd_ctl_elem_value * ucontrol) 1033{ 1034 int left, right; 1035 left = ucontrol->value.integer.value[0] & 1; 1036 right = ucontrol->value.integer.value[1] & 1; 1037 1038 return snd_saa7134_capsrc_set(kcontrol, left, right, false); 1039} 1040 1041static struct snd_kcontrol_new snd_saa7134_volume_controls[] = { 1042SAA713x_VOLUME("Video Volume", 0, MIXER_ADDR_TVTUNER), 1043SAA713x_VOLUME("Line Volume", 1, MIXER_ADDR_LINE1), 1044SAA713x_VOLUME("Line Volume", 2, MIXER_ADDR_LINE2), 1045}; 1046 1047static struct snd_kcontrol_new snd_saa7134_capture_controls[] = { 1048SAA713x_CAPSRC("Video Capture Switch", 0, MIXER_ADDR_TVTUNER), 1049SAA713x_CAPSRC("Line Capture Switch", 1, MIXER_ADDR_LINE1), 1050SAA713x_CAPSRC("Line Capture Switch", 2, MIXER_ADDR_LINE2), 1051}; 1052 1053/* 1054 * ALSA mixer setup 1055 * 1056 * Called when initializing the board. Sets up the name and hooks up 1057 * the callbacks 1058 * 1059 */ 1060 1061static int snd_card_saa7134_new_mixer(snd_card_saa7134_t * chip) 1062{ 1063 struct snd_card *card = chip->card; 1064 struct snd_kcontrol *kcontrol; 1065 unsigned int idx; 1066 int err, addr; 1067 1068 strscpy(card->mixername, "SAA7134 Mixer", sizeof(card->mixername)); 1069 1070 for (idx = 0; idx < ARRAY_SIZE(snd_saa7134_volume_controls); idx++) { 1071 kcontrol = snd_ctl_new1(&snd_saa7134_volume_controls[idx], 1072 chip); 1073 err = snd_ctl_add(card, kcontrol); 1074 if (err < 0) 1075 return err; 1076 } 1077 1078 for (idx = 0; idx < ARRAY_SIZE(snd_saa7134_capture_controls); idx++) { 1079 kcontrol = snd_ctl_new1(&snd_saa7134_capture_controls[idx], 1080 chip); 1081 addr = snd_saa7134_capture_controls[idx].private_value; 1082 chip->capture_ctl[addr] = kcontrol; 1083 err = snd_ctl_add(card, kcontrol); 1084 if (err < 0) 1085 return err; 1086 } 1087 1088 chip->capture_source_addr = MIXER_ADDR_UNSELECTED; 1089 return 0; 1090} 1091 1092static void snd_saa7134_free(struct snd_card * card) 1093{ 1094 snd_card_saa7134_t *chip = card->private_data; 1095 1096 if (chip->dev->dmasound.priv_data == NULL) 1097 return; 1098 1099 if (chip->irq >= 0) 1100 free_irq(chip->irq, &chip->dev->dmasound); 1101 1102 chip->dev->dmasound.priv_data = NULL; 1103 1104} 1105 1106/* 1107 * ALSA initialization 1108 * 1109 * Called by the init routine, once for each saa7134 device present, 1110 * it creates the basic structures and registers the ALSA devices 1111 * 1112 */ 1113 1114static int alsa_card_saa7134_create(struct saa7134_dev *dev, int devnum) 1115{ 1116 1117 struct snd_card *card; 1118 snd_card_saa7134_t *chip; 1119 int err; 1120 1121 1122 if (devnum >= SNDRV_CARDS) 1123 return -ENODEV; 1124 if (!enable[devnum]) 1125 return -ENODEV; 1126 1127 err = snd_card_new(&dev->pci->dev, index[devnum], id[devnum], 1128 THIS_MODULE, sizeof(snd_card_saa7134_t), &card); 1129 if (err < 0) 1130 return err; 1131 1132 strscpy(card->driver, "SAA7134", sizeof(card->driver)); 1133 1134 /* Card "creation" */ 1135 1136 card->private_free = snd_saa7134_free; 1137 chip = card->private_data; 1138 1139 spin_lock_init(&chip->lock); 1140 spin_lock_init(&chip->mixer_lock); 1141 1142 chip->dev = dev; 1143 1144 chip->card = card; 1145 1146 chip->pci = dev->pci; 1147 chip->iobase = pci_resource_start(dev->pci, 0); 1148 1149 1150 err = request_irq(dev->pci->irq, saa7134_alsa_irq, 1151 IRQF_SHARED, dev->name, 1152 (void*) &dev->dmasound); 1153 1154 if (err < 0) { 1155 pr_err("%s: can't get IRQ %d for ALSA\n", 1156 dev->name, dev->pci->irq); 1157 goto __nodev; 1158 } 1159 1160 chip->irq = dev->pci->irq; 1161 1162 mutex_init(&dev->dmasound.lock); 1163 1164 if ((err = snd_card_saa7134_new_mixer(chip)) < 0) 1165 goto __nodev; 1166 1167 if ((err = snd_card_saa7134_pcm(chip, 0)) < 0) 1168 goto __nodev; 1169 1170 /* End of "creation" */ 1171 1172 strscpy(card->shortname, "SAA7134", sizeof(card->shortname)); 1173 sprintf(card->longname, "%s at 0x%lx irq %d", 1174 chip->dev->name, chip->iobase, chip->irq); 1175 1176 pr_info("%s/alsa: %s registered as card %d\n", 1177 dev->name, card->longname, index[devnum]); 1178 1179 if ((err = snd_card_register(card)) == 0) { 1180 snd_saa7134_cards[devnum] = card; 1181 return 0; 1182 } 1183 1184__nodev: 1185 snd_card_free(card); 1186 return err; 1187} 1188 1189 1190static int alsa_device_init(struct saa7134_dev *dev) 1191{ 1192 dev->dmasound.priv_data = dev; 1193 alsa_card_saa7134_create(dev,dev->nr); 1194 return 1; 1195} 1196 1197static int alsa_device_exit(struct saa7134_dev *dev) 1198{ 1199 if (!snd_saa7134_cards[dev->nr]) 1200 return 1; 1201 1202 snd_card_free(snd_saa7134_cards[dev->nr]); 1203 snd_saa7134_cards[dev->nr] = NULL; 1204 return 1; 1205} 1206 1207/* 1208 * Module initializer 1209 * 1210 * Loops through present saa7134 cards, and assigns an ALSA device 1211 * to each one 1212 * 1213 */ 1214 1215static int saa7134_alsa_init(void) 1216{ 1217 struct saa7134_dev *dev; 1218 1219 saa7134_dmasound_init = alsa_device_init; 1220 saa7134_dmasound_exit = alsa_device_exit; 1221 1222 pr_info("saa7134 ALSA driver for DMA sound loaded\n"); 1223 1224 list_for_each_entry(dev, &saa7134_devlist, devlist) { 1225 if (dev->pci->device == PCI_DEVICE_ID_PHILIPS_SAA7130) 1226 pr_info("%s/alsa: %s doesn't support digital audio\n", 1227 dev->name, saa7134_boards[dev->board].name); 1228 else 1229 alsa_device_init(dev); 1230 } 1231 1232 if (list_empty(&saa7134_devlist)) 1233 pr_info("saa7134 ALSA: no saa7134 cards found\n"); 1234 1235 return 0; 1236 1237} 1238 1239/* 1240 * Module destructor 1241 */ 1242 1243static void saa7134_alsa_exit(void) 1244{ 1245 int idx; 1246 1247 for (idx = 0; idx < SNDRV_CARDS; idx++) { 1248 if (snd_saa7134_cards[idx]) 1249 snd_card_free(snd_saa7134_cards[idx]); 1250 } 1251 1252 saa7134_dmasound_init = NULL; 1253 saa7134_dmasound_exit = NULL; 1254 pr_info("saa7134 ALSA driver for DMA sound unloaded\n"); 1255 1256 return; 1257} 1258 1259/* We initialize this late, to make sure the sound system is up and running */ 1260late_initcall(saa7134_alsa_init); 1261module_exit(saa7134_alsa_exit); 1262MODULE_LICENSE("GPL"); 1263MODULE_AUTHOR("Ricardo Cerqueira"); 1264