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 34 static int index[SNDRV_CARDS] = SNDRV_DEFAULT_IDX; /* Index 0-MAX */ 35 static char *id[SNDRV_CARDS] = SNDRV_DEFAULT_STR; /* ID for this card */ 36 static int enable[SNDRV_CARDS] = {1, [1 ... (SNDRV_CARDS - 1)] = 1}; 37 38 module_param_array(index, int, NULL, 0444); 39 module_param_array(enable, int, NULL, 0444); 40 MODULE_PARM_DESC(index, "Index value for SAA7134 capture interface(s)."); 41 MODULE_PARM_DESC(enable, "Enable (or not) the SAA7134 capture interface(s)."); 42 43 /* 44 * Main chip structure 45 */ 46 47 typedef 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 69 typedef 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 77 static 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 89 static 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 */ 104 105 static 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 */ 122 123 static 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 */ 191 192 static 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 } 217 218 out: 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 */ 231 232 static 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 } 254 255 static int saa7134_alsa_dma_init(struct saa7134_dev *dev, int nr_pages) 256 { 257 struct saa7134_dmasound *dma = &dev->dmasound; 258 struct page *pg; 259 int i; 260 261 dma->vaddr = vmalloc_32(nr_pages << PAGE_SHIFT); 262 if (NULL == dma->vaddr) { 263 pr_debug("vmalloc_32(%d pages) failed\n", nr_pages); 264 return -ENOMEM; 265 } 266 267 pr_debug("vmalloc is at addr %p, size=%d\n", 268 dma->vaddr, nr_pages << PAGE_SHIFT); 269 270 memset(dma->vaddr, 0, nr_pages << PAGE_SHIFT); 271 dma->nr_pages = nr_pages; 272 273 dma->sglist = vzalloc(array_size(sizeof(*dma->sglist), dma->nr_pages)); 274 if (NULL == dma->sglist) 275 goto vzalloc_err; 276 277 sg_init_table(dma->sglist, dma->nr_pages); 278 for (i = 0; i < dma->nr_pages; i++) { 279 pg = vmalloc_to_page(dma->vaddr + i * PAGE_SIZE); 280 if (NULL == pg) 281 goto vmalloc_to_page_err; 282 sg_set_page(&dma->sglist[i], pg, PAGE_SIZE, 0); 283 } 284 return 0; 285 286 vmalloc_to_page_err: 287 vfree(dma->sglist); 288 dma->sglist = NULL; 289 vzalloc_err: 290 vfree(dma->vaddr); 291 dma->vaddr = NULL; 292 return -ENOMEM; 293 } 294 295 static int saa7134_alsa_dma_map(struct saa7134_dev *dev) 296 { 297 struct saa7134_dmasound *dma = &dev->dmasound; 298 299 dma->sglen = dma_map_sg(&dev->pci->dev, dma->sglist, 300 dma->nr_pages, PCI_DMA_FROMDEVICE); 301 302 if (0 == dma->sglen) { 303 pr_warn("%s: saa7134_alsa_map_sg failed\n", __func__); 304 return -ENOMEM; 305 } 306 return 0; 307 } 308 309 static int saa7134_alsa_dma_unmap(struct saa7134_dev *dev) 310 { 311 struct saa7134_dmasound *dma = &dev->dmasound; 312 313 if (!dma->sglen) 314 return 0; 315 316 dma_unmap_sg(&dev->pci->dev, dma->sglist, dma->sglen, PCI_DMA_FROMDEVICE); 317 dma->sglen = 0; 318 return 0; 319 } 320 321 static int saa7134_alsa_dma_free(struct saa7134_dmasound *dma) 322 { 323 vfree(dma->sglist); 324 dma->sglist = NULL; 325 vfree(dma->vaddr); 326 dma->vaddr = NULL; 327 return 0; 328 } 329 330 /* 331 * DMA buffer initialization 332 * 333 * Uses V4L functions to initialize the DMA. Shouldn't be necessary in 334 * ALSA, but I was unable to use ALSA's own DMA, and had to force the 335 * usage of V4L's 336 * 337 * - Copied verbatim from saa7134-oss. 338 * 339 */ 340 341 static int dsp_buffer_init(struct saa7134_dev *dev) 342 { 343 int err; 344 345 BUG_ON(!dev->dmasound.bufsize); 346 347 err = saa7134_alsa_dma_init(dev, 348 (dev->dmasound.bufsize + PAGE_SIZE) >> PAGE_SHIFT); 349 if (0 != err) 350 return err; 351 return 0; 352 } 353 354 /* 355 * DMA buffer release 356 * 357 * Called after closing the device, during snd_card_saa7134_capture_close 358 * 359 */ 360 361 static int dsp_buffer_free(struct saa7134_dev *dev) 362 { 363 BUG_ON(!dev->dmasound.blksize); 364 365 saa7134_alsa_dma_free(&dev->dmasound); 366 367 dev->dmasound.blocks = 0; 368 dev->dmasound.blksize = 0; 369 dev->dmasound.bufsize = 0; 370 371 return 0; 372 } 373 374 /* 375 * Setting the capture source and updating the ALSA controls 376 */ 377 static int snd_saa7134_capsrc_set(struct snd_kcontrol *kcontrol, 378 int left, int right, bool force_notify) 379 { 380 snd_card_saa7134_t *chip = snd_kcontrol_chip(kcontrol); 381 int change = 0, addr = kcontrol->private_value; 382 int active, old_addr; 383 u32 anabar, xbarin; 384 int analog_io, rate; 385 struct saa7134_dev *dev; 386 387 dev = chip->dev; 388 389 spin_lock_irq(&chip->mixer_lock); 390 391 active = left != 0 || right != 0; 392 old_addr = chip->capture_source_addr; 393 394 /* The active capture source cannot be deactivated */ 395 if (active) { 396 change = old_addr != addr || 397 chip->capture_source[0] != left || 398 chip->capture_source[1] != right; 399 400 chip->capture_source[0] = left; 401 chip->capture_source[1] = right; 402 chip->capture_source_addr = addr; 403 dev->dmasound.input = addr; 404 } 405 spin_unlock_irq(&chip->mixer_lock); 406 407 if (change) { 408 switch (dev->pci->device) { 409 410 case PCI_DEVICE_ID_PHILIPS_SAA7134: 411 switch (addr) { 412 case MIXER_ADDR_TVTUNER: 413 saa_andorb(SAA7134_AUDIO_FORMAT_CTRL, 414 0xc0, 0xc0); 415 saa_andorb(SAA7134_SIF_SAMPLE_FREQ, 416 0x03, 0x00); 417 break; 418 case MIXER_ADDR_LINE1: 419 case MIXER_ADDR_LINE2: 420 analog_io = (MIXER_ADDR_LINE1 == addr) ? 421 0x00 : 0x08; 422 rate = (32000 == dev->dmasound.rate) ? 423 0x01 : 0x03; 424 saa_andorb(SAA7134_ANALOG_IO_SELECT, 425 0x08, analog_io); 426 saa_andorb(SAA7134_AUDIO_FORMAT_CTRL, 427 0xc0, 0x80); 428 saa_andorb(SAA7134_SIF_SAMPLE_FREQ, 429 0x03, rate); 430 break; 431 } 432 433 break; 434 case PCI_DEVICE_ID_PHILIPS_SAA7133: 435 case PCI_DEVICE_ID_PHILIPS_SAA7135: 436 xbarin = 0x03; /* adc */ 437 anabar = 0; 438 switch (addr) { 439 case MIXER_ADDR_TVTUNER: 440 xbarin = 0; /* Demodulator */ 441 anabar = 2; /* DACs */ 442 break; 443 case MIXER_ADDR_LINE1: 444 anabar = 0; /* aux1, aux1 */ 445 break; 446 case MIXER_ADDR_LINE2: 447 anabar = 9; /* aux2, aux2 */ 448 break; 449 } 450 451 /* output xbar always main channel */ 452 saa_dsp_writel(dev, SAA7133_DIGITAL_OUTPUT_SEL1, 453 0xbbbb10); 454 455 if (left || right) { 456 /* We've got data, turn the input on */ 457 saa_dsp_writel(dev, SAA7133_DIGITAL_INPUT_XBAR1, 458 xbarin); 459 saa_writel(SAA7133_ANALOG_IO_SELECT, anabar); 460 } else { 461 saa_dsp_writel(dev, SAA7133_DIGITAL_INPUT_XBAR1, 462 0); 463 saa_writel(SAA7133_ANALOG_IO_SELECT, 0); 464 } 465 break; 466 } 467 } 468 469 if (change) { 470 if (force_notify) 471 snd_ctl_notify(chip->card, 472 SNDRV_CTL_EVENT_MASK_VALUE, 473 &chip->capture_ctl[addr]->id); 474 475 if (old_addr != MIXER_ADDR_UNSELECTED && old_addr != addr) 476 snd_ctl_notify(chip->card, 477 SNDRV_CTL_EVENT_MASK_VALUE, 478 &chip->capture_ctl[old_addr]->id); 479 } 480 481 return change; 482 } 483 484 /* 485 * ALSA PCM preparation 486 * 487 * - One of the ALSA capture callbacks. 488 * 489 * Called right after the capture device is opened, this function configures 490 * the buffer using the previously defined functions, allocates the memory, 491 * sets up the hardware registers, and then starts the DMA. When this function 492 * returns, the audio should be flowing. 493 * 494 */ 495 496 static int snd_card_saa7134_capture_prepare(struct snd_pcm_substream * substream) 497 { 498 struct snd_pcm_runtime *runtime = substream->runtime; 499 int bswap, sign; 500 u32 fmt, control; 501 snd_card_saa7134_t *saa7134 = snd_pcm_substream_chip(substream); 502 struct saa7134_dev *dev; 503 snd_card_saa7134_pcm_t *pcm = runtime->private_data; 504 505 pcm->dev->dmasound.substream = substream; 506 507 dev = saa7134->dev; 508 509 if (snd_pcm_format_width(runtime->format) == 8) 510 fmt = 0x00; 511 else 512 fmt = 0x01; 513 514 if (snd_pcm_format_signed(runtime->format)) 515 sign = 1; 516 else 517 sign = 0; 518 519 if (snd_pcm_format_big_endian(runtime->format)) 520 bswap = 1; 521 else 522 bswap = 0; 523 524 switch (dev->pci->device) { 525 case PCI_DEVICE_ID_PHILIPS_SAA7134: 526 if (1 == runtime->channels) 527 fmt |= (1 << 3); 528 if (2 == runtime->channels) 529 fmt |= (3 << 3); 530 if (sign) 531 fmt |= 0x04; 532 533 fmt |= (MIXER_ADDR_TVTUNER == dev->dmasound.input) ? 0xc0 : 0x80; 534 saa_writeb(SAA7134_NUM_SAMPLES0, ((dev->dmasound.blksize - 1) & 0x0000ff)); 535 saa_writeb(SAA7134_NUM_SAMPLES1, ((dev->dmasound.blksize - 1) & 0x00ff00) >> 8); 536 saa_writeb(SAA7134_NUM_SAMPLES2, ((dev->dmasound.blksize - 1) & 0xff0000) >> 16); 537 saa_writeb(SAA7134_AUDIO_FORMAT_CTRL, fmt); 538 539 break; 540 case PCI_DEVICE_ID_PHILIPS_SAA7133: 541 case PCI_DEVICE_ID_PHILIPS_SAA7135: 542 if (1 == runtime->channels) 543 fmt |= (1 << 4); 544 if (2 == runtime->channels) 545 fmt |= (2 << 4); 546 if (!sign) 547 fmt |= 0x04; 548 saa_writel(SAA7133_NUM_SAMPLES, dev->dmasound.blksize -1); 549 saa_writel(SAA7133_AUDIO_CHANNEL, 0x543210 | (fmt << 24)); 550 break; 551 } 552 553 pr_debug("rec_start: afmt=%d ch=%d => fmt=0x%x swap=%c\n", 554 runtime->format, runtime->channels, fmt, 555 bswap ? 'b' : '-'); 556 /* dma: setup channel 6 (= AUDIO) */ 557 control = SAA7134_RS_CONTROL_BURST_16 | 558 SAA7134_RS_CONTROL_ME | 559 (dev->dmasound.pt.dma >> 12); 560 if (bswap) 561 control |= SAA7134_RS_CONTROL_BSWAP; 562 563 saa_writel(SAA7134_RS_BA1(6),0); 564 saa_writel(SAA7134_RS_BA2(6),dev->dmasound.blksize); 565 saa_writel(SAA7134_RS_PITCH(6),0); 566 saa_writel(SAA7134_RS_CONTROL(6),control); 567 568 dev->dmasound.rate = runtime->rate; 569 570 /* Setup and update the card/ALSA controls */ 571 snd_saa7134_capsrc_set(saa7134->capture_ctl[dev->dmasound.input], 1, 1, 572 true); 573 574 return 0; 575 576 } 577 578 /* 579 * ALSA pointer fetching 580 * 581 * - One of the ALSA capture callbacks. 582 * 583 * Called whenever a period elapses, it must return the current hardware 584 * position of the buffer. 585 * Also resets the read counter used to prevent overruns 586 * 587 */ 588 589 static snd_pcm_uframes_t 590 snd_card_saa7134_capture_pointer(struct snd_pcm_substream * substream) 591 { 592 struct snd_pcm_runtime *runtime = substream->runtime; 593 snd_card_saa7134_pcm_t *pcm = runtime->private_data; 594 struct saa7134_dev *dev=pcm->dev; 595 596 if (dev->dmasound.read_count) { 597 dev->dmasound.read_count -= snd_pcm_lib_period_bytes(substream); 598 dev->dmasound.read_offset += snd_pcm_lib_period_bytes(substream); 599 if (dev->dmasound.read_offset == dev->dmasound.bufsize) 600 dev->dmasound.read_offset = 0; 601 } 602 603 return bytes_to_frames(runtime, dev->dmasound.read_offset); 604 } 605 606 /* 607 * ALSA hardware capabilities definition 608 * 609 * Report only 32kHz for ALSA: 610 * 611 * - SAA7133/35 uses DDEP (DemDec Easy Programming mode), which works in 32kHz 612 * only 613 * - SAA7134 for TV mode uses DemDec mode (32kHz) 614 * - Radio works in 32kHz only 615 * - When recording 48kHz from Line1/Line2, switching of capture source to TV 616 * means 617 * switching to 32kHz without any frequency translation 618 */ 619 620 static const struct snd_pcm_hardware snd_card_saa7134_capture = 621 { 622 .info = (SNDRV_PCM_INFO_MMAP | SNDRV_PCM_INFO_INTERLEAVED | 623 SNDRV_PCM_INFO_BLOCK_TRANSFER | 624 SNDRV_PCM_INFO_MMAP_VALID), 625 .formats = SNDRV_PCM_FMTBIT_S16_LE | \ 626 SNDRV_PCM_FMTBIT_S16_BE | \ 627 SNDRV_PCM_FMTBIT_S8 | \ 628 SNDRV_PCM_FMTBIT_U8 | \ 629 SNDRV_PCM_FMTBIT_U16_LE | \ 630 SNDRV_PCM_FMTBIT_U16_BE, 631 .rates = SNDRV_PCM_RATE_32000, 632 .rate_min = 32000, 633 .rate_max = 32000, 634 .channels_min = 1, 635 .channels_max = 2, 636 .buffer_bytes_max = (256*1024), 637 .period_bytes_min = 64, 638 .period_bytes_max = (256*1024), 639 .periods_min = 4, 640 .periods_max = 1024, 641 }; 642 643 static void snd_card_saa7134_runtime_free(struct snd_pcm_runtime *runtime) 644 { 645 snd_card_saa7134_pcm_t *pcm = runtime->private_data; 646 647 kfree(pcm); 648 } 649 650 651 /* 652 * ALSA hardware params 653 * 654 * - One of the ALSA capture callbacks. 655 * 656 * Called on initialization, right before the PCM preparation 657 * 658 */ 659 660 static int snd_card_saa7134_hw_params(struct snd_pcm_substream * substream, 661 struct snd_pcm_hw_params * hw_params) 662 { 663 snd_card_saa7134_t *saa7134 = snd_pcm_substream_chip(substream); 664 struct saa7134_dev *dev; 665 unsigned int period_size, periods; 666 int err; 667 668 period_size = params_period_bytes(hw_params); 669 periods = params_periods(hw_params); 670 671 if (period_size < 0x100 || period_size > 0x10000) 672 return -EINVAL; 673 if (periods < 4) 674 return -EINVAL; 675 if (period_size * periods > 1024 * 1024) 676 return -EINVAL; 677 678 dev = saa7134->dev; 679 680 if (dev->dmasound.blocks == periods && 681 dev->dmasound.blksize == period_size) 682 return 0; 683 684 /* release the old buffer */ 685 if (substream->runtime->dma_area) { 686 saa7134_pgtable_free(dev->pci, &dev->dmasound.pt); 687 saa7134_alsa_dma_unmap(dev); 688 dsp_buffer_free(dev); 689 substream->runtime->dma_area = NULL; 690 } 691 dev->dmasound.blocks = periods; 692 dev->dmasound.blksize = period_size; 693 dev->dmasound.bufsize = period_size * periods; 694 695 err = dsp_buffer_init(dev); 696 if (0 != err) { 697 dev->dmasound.blocks = 0; 698 dev->dmasound.blksize = 0; 699 dev->dmasound.bufsize = 0; 700 return err; 701 } 702 703 err = saa7134_alsa_dma_map(dev); 704 if (err) { 705 dsp_buffer_free(dev); 706 return err; 707 } 708 err = saa7134_pgtable_alloc(dev->pci, &dev->dmasound.pt); 709 if (err) { 710 saa7134_alsa_dma_unmap(dev); 711 dsp_buffer_free(dev); 712 return err; 713 } 714 err = saa7134_pgtable_build(dev->pci, &dev->dmasound.pt, 715 dev->dmasound.sglist, dev->dmasound.sglen, 0); 716 if (err) { 717 saa7134_pgtable_free(dev->pci, &dev->dmasound.pt); 718 saa7134_alsa_dma_unmap(dev); 719 dsp_buffer_free(dev); 720 return err; 721 } 722 723 /* I should be able to use runtime->dma_addr in the control 724 byte, but it doesn't work. So I allocate the DMA using the 725 V4L functions, and force ALSA to use that as the DMA area */ 726 727 substream->runtime->dma_area = dev->dmasound.vaddr; 728 substream->runtime->dma_bytes = dev->dmasound.bufsize; 729 substream->runtime->dma_addr = 0; 730 731 return 0; 732 733 } 734 735 /* 736 * ALSA hardware release 737 * 738 * - One of the ALSA capture callbacks. 739 * 740 * Called after closing the device, but before snd_card_saa7134_capture_close 741 * It stops the DMA audio and releases the buffers. 742 * 743 */ 744 745 static int snd_card_saa7134_hw_free(struct snd_pcm_substream * substream) 746 { 747 snd_card_saa7134_t *saa7134 = snd_pcm_substream_chip(substream); 748 struct saa7134_dev *dev; 749 750 dev = saa7134->dev; 751 752 if (substream->runtime->dma_area) { 753 saa7134_pgtable_free(dev->pci, &dev->dmasound.pt); 754 saa7134_alsa_dma_unmap(dev); 755 dsp_buffer_free(dev); 756 substream->runtime->dma_area = NULL; 757 } 758 759 return 0; 760 } 761 762 /* 763 * ALSA capture finish 764 * 765 * - One of the ALSA capture callbacks. 766 * 767 * Called after closing the device. 768 * 769 */ 770 771 static int snd_card_saa7134_capture_close(struct snd_pcm_substream * substream) 772 { 773 snd_card_saa7134_t *saa7134 = snd_pcm_substream_chip(substream); 774 struct saa7134_dev *dev = saa7134->dev; 775 776 if (saa7134->mute_was_on) { 777 dev->ctl_mute = 1; 778 saa7134_tvaudio_setmute(dev); 779 } 780 return 0; 781 } 782 783 /* 784 * ALSA capture start 785 * 786 * - One of the ALSA capture callbacks. 787 * 788 * Called when opening the device. It creates and populates the PCM 789 * structure 790 * 791 */ 792 793 static int snd_card_saa7134_capture_open(struct snd_pcm_substream * substream) 794 { 795 struct snd_pcm_runtime *runtime = substream->runtime; 796 snd_card_saa7134_pcm_t *pcm; 797 snd_card_saa7134_t *saa7134 = snd_pcm_substream_chip(substream); 798 struct saa7134_dev *dev; 799 int amux, err; 800 801 if (!saa7134) { 802 pr_err("BUG: saa7134 can't find device struct. Can't proceed with open\n"); 803 return -ENODEV; 804 } 805 dev = saa7134->dev; 806 mutex_lock(&dev->dmasound.lock); 807 808 dev->dmasound.read_count = 0; 809 dev->dmasound.read_offset = 0; 810 811 amux = dev->input->amux; 812 if ((amux < 1) || (amux > 3)) 813 amux = 1; 814 dev->dmasound.input = amux - 1; 815 816 mutex_unlock(&dev->dmasound.lock); 817 818 pcm = kzalloc(sizeof(*pcm), GFP_KERNEL); 819 if (pcm == NULL) 820 return -ENOMEM; 821 822 pcm->dev=saa7134->dev; 823 824 spin_lock_init(&pcm->lock); 825 826 pcm->substream = substream; 827 runtime->private_data = pcm; 828 runtime->private_free = snd_card_saa7134_runtime_free; 829 runtime->hw = snd_card_saa7134_capture; 830 831 if (dev->ctl_mute != 0) { 832 saa7134->mute_was_on = 1; 833 dev->ctl_mute = 0; 834 saa7134_tvaudio_setmute(dev); 835 } 836 837 err = snd_pcm_hw_constraint_integer(runtime, 838 SNDRV_PCM_HW_PARAM_PERIODS); 839 if (err < 0) 840 return err; 841 842 err = snd_pcm_hw_constraint_step(runtime, 0, 843 SNDRV_PCM_HW_PARAM_PERIODS, 2); 844 if (err < 0) 845 return err; 846 847 return 0; 848 } 849 850 /* 851 * page callback (needed for mmap) 852 */ 853 854 static struct page *snd_card_saa7134_page(struct snd_pcm_substream *substream, 855 unsigned long offset) 856 { 857 void *pageptr = substream->runtime->dma_area + offset; 858 return vmalloc_to_page(pageptr); 859 } 860 861 /* 862 * ALSA capture callbacks definition 863 */ 864 865 static const struct snd_pcm_ops snd_card_saa7134_capture_ops = { 866 .open = snd_card_saa7134_capture_open, 867 .close = snd_card_saa7134_capture_close, 868 .ioctl = snd_pcm_lib_ioctl, 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 */ 884 885 static 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 } 904 905 static 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 } 914 915 static 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 } 925 926 static 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 1002 static 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 1012 static 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 1031 static 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 1041 static struct snd_kcontrol_new snd_saa7134_volume_controls[] = { 1042 SAA713x_VOLUME("Video Volume", 0, MIXER_ADDR_TVTUNER), 1043 SAA713x_VOLUME("Line Volume", 1, MIXER_ADDR_LINE1), 1044 SAA713x_VOLUME("Line Volume", 2, MIXER_ADDR_LINE2), 1045 }; 1046 1047 static struct snd_kcontrol_new snd_saa7134_capture_controls[] = { 1048 SAA713x_CAPSRC("Video Capture Switch", 0, MIXER_ADDR_TVTUNER), 1049 SAA713x_CAPSRC("Line Capture Switch", 1, MIXER_ADDR_LINE1), 1050 SAA713x_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 1061 static 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 1092 static 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 1114 static 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 1190 static 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 1197 static 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 1215 static int saa7134_alsa_init(void) 1216 { 1217 struct saa7134_dev *dev = NULL; 1218 struct list_head *list; 1219 1220 saa7134_dmasound_init = alsa_device_init; 1221 saa7134_dmasound_exit = alsa_device_exit; 1222 1223 pr_info("saa7134 ALSA driver for DMA sound loaded\n"); 1224 1225 list_for_each(list,&saa7134_devlist) { 1226 dev = list_entry(list, struct saa7134_dev, devlist); 1227 if (dev->pci->device == PCI_DEVICE_ID_PHILIPS_SAA7130) 1228 pr_info("%s/alsa: %s doesn't support digital audio\n", 1229 dev->name, saa7134_boards[dev->board].name); 1230 else 1231 alsa_device_init(dev); 1232 } 1233 1234 if (dev == NULL) 1235 pr_info("saa7134 ALSA: no saa7134 cards found\n"); 1236 1237 return 0; 1238 1239 } 1240 1241 /* 1242 * Module destructor 1243 */ 1244 1245 static void saa7134_alsa_exit(void) 1246 { 1247 int idx; 1248 1249 for (idx = 0; idx < SNDRV_CARDS; idx++) { 1250 if (snd_saa7134_cards[idx]) 1251 snd_card_free(snd_saa7134_cards[idx]); 1252 } 1253 1254 saa7134_dmasound_init = NULL; 1255 saa7134_dmasound_exit = NULL; 1256 pr_info("saa7134 ALSA driver for DMA sound unloaded\n"); 1257 1258 return; 1259 } 1260 1261 /* We initialize this late, to make sure the sound system is up and running */ 1262 late_initcall(saa7134_alsa_init); 1263 module_exit(saa7134_alsa_exit); 1264 MODULE_LICENSE("GPL"); 1265 MODULE_AUTHOR("Ricardo Cerqueira"); 1266