1/* 2 * BRIEF MODULE DESCRIPTION 3 * Driver for AMD Au1000 MIPS Processor, AC'97 Sound Port 4 * 5 * Copyright 2004 Cooper Street Innovations Inc. 6 * Author: Charles Eidsness <charles@cooper-street.com> 7 * 8 * This program is free software; you can redistribute it and/or modify it 9 * under the terms of the GNU General Public License as published by the 10 * Free Software Foundation; either version 2 of the License, or (at your 11 * option) any later version. 12 * 13 * THIS SOFTWARE IS PROVIDED ``AS IS'' AND ANY EXPRESS OR IMPLIED 14 * WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES OF 15 * MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED. IN 16 * NO EVENT SHALL THE AUTHOR BE LIABLE FOR ANY DIRECT, INDIRECT, 17 * INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT 18 * NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF 19 * USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON 20 * ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT 21 * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF 22 * THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE. 23 * 24 * You should have received a copy of the GNU General Public License along 25 * with this program; if not, write to the Free Software Foundation, Inc., 26 * 675 Mass Ave, Cambridge, MA 02139, USA. 27 * 28 * History: 29 * 30 * 2004-09-09 Charles Eidsness -- Original verion -- based on 31 * sa11xx-uda1341.c ALSA driver and the 32 * au1000.c OSS driver. 33 * 2004-09-09 Matt Porter -- Added support for ALSA 1.0.6 34 * 35 */ 36 37#include <linux/ioport.h> 38#include <linux/interrupt.h> 39#include <sound/driver.h> 40#include <linux/init.h> 41#include <linux/slab.h> 42#include <linux/version.h> 43#include <sound/core.h> 44#include <sound/initval.h> 45#include <sound/pcm.h> 46#include <sound/pcm_params.h> 47#include <sound/ac97_codec.h> 48#include <asm/mach-au1x00/au1000.h> 49#include <asm/mach-au1x00/au1000_dma.h> 50 51MODULE_AUTHOR("Charles Eidsness <charles@cooper-street.com>"); 52MODULE_DESCRIPTION("Au1000 AC'97 ALSA Driver"); 53MODULE_LICENSE("GPL"); 54MODULE_SUPPORTED_DEVICE("{{AMD,Au1000 AC'97}}"); 55 56#define PLAYBACK 0 57#define CAPTURE 1 58#define AC97_SLOT_3 0x01 59#define AC97_SLOT_4 0x02 60#define AC97_SLOT_6 0x08 61#define AC97_CMD_IRQ 31 62#define READ 0 63#define WRITE 1 64#define READ_WAIT 2 65#define RW_DONE 3 66 67struct au1000_period 68{ 69 u32 start; 70 u32 relative_end; /*realtive to start of buffer*/ 71 struct au1000_period * next; 72}; 73 74/*Au1000 AC97 Port Control Reisters*/ 75struct au1000_ac97_reg { 76 u32 volatile config; 77 u32 volatile status; 78 u32 volatile data; 79 u32 volatile cmd; 80 u32 volatile cntrl; 81}; 82 83struct audio_stream { 84 struct snd_pcm_substream *substream; 85 int dma; 86 spinlock_t dma_lock; 87 struct au1000_period * buffer; 88 unsigned int period_size; 89 unsigned int periods; 90}; 91 92struct snd_au1000 { 93 struct snd_card *card; 94 struct au1000_ac97_reg volatile *ac97_ioport; 95 96 struct resource *ac97_res_port; 97 spinlock_t ac97_lock; 98 struct snd_ac97 *ac97; 99 100 struct snd_pcm *pcm; 101 struct audio_stream *stream[2]; /* playback & capture */ 102}; 103 104/*--------------------------- Local Functions --------------------------------*/ 105static void 106au1000_set_ac97_xmit_slots(struct snd_au1000 *au1000, long xmit_slots) 107{ 108 u32 volatile ac97_config; 109 110 spin_lock(&au1000->ac97_lock); 111 ac97_config = au1000->ac97_ioport->config; 112 ac97_config = ac97_config & ~AC97C_XMIT_SLOTS_MASK; 113 ac97_config |= (xmit_slots << AC97C_XMIT_SLOTS_BIT); 114 au1000->ac97_ioport->config = ac97_config; 115 spin_unlock(&au1000->ac97_lock); 116} 117 118static void 119au1000_set_ac97_recv_slots(struct snd_au1000 *au1000, long recv_slots) 120{ 121 u32 volatile ac97_config; 122 123 spin_lock(&au1000->ac97_lock); 124 ac97_config = au1000->ac97_ioport->config; 125 ac97_config = ac97_config & ~AC97C_RECV_SLOTS_MASK; 126 ac97_config |= (recv_slots << AC97C_RECV_SLOTS_BIT); 127 au1000->ac97_ioport->config = ac97_config; 128 spin_unlock(&au1000->ac97_lock); 129} 130 131 132static void 133au1000_release_dma_link(struct audio_stream *stream) 134{ 135 struct au1000_period * pointer; 136 struct au1000_period * pointer_next; 137 138 stream->period_size = 0; 139 stream->periods = 0; 140 pointer = stream->buffer; 141 if (! pointer) 142 return; 143 do { 144 pointer_next = pointer->next; 145 kfree(pointer); 146 pointer = pointer_next; 147 } while (pointer != stream->buffer); 148 stream->buffer = NULL; 149} 150 151static int 152au1000_setup_dma_link(struct audio_stream *stream, unsigned int period_bytes, 153 unsigned int periods) 154{ 155 struct snd_pcm_substream *substream = stream->substream; 156 struct snd_pcm_runtime *runtime = substream->runtime; 157 struct au1000_period *pointer; 158 unsigned long dma_start; 159 int i; 160 161 dma_start = virt_to_phys(runtime->dma_area); 162 163 if (stream->period_size == period_bytes && 164 stream->periods == periods) 165 return 0; /* not changed */ 166 167 au1000_release_dma_link(stream); 168 169 stream->period_size = period_bytes; 170 stream->periods = periods; 171 172 stream->buffer = kmalloc(sizeof(struct au1000_period), GFP_KERNEL); 173 if (! stream->buffer) 174 return -ENOMEM; 175 pointer = stream->buffer; 176 for (i = 0; i < periods; i++) { 177 pointer->start = (u32)(dma_start + (i * period_bytes)); 178 pointer->relative_end = (u32) (((i+1) * period_bytes) - 0x1); 179 if (i < periods - 1) { 180 pointer->next = kmalloc(sizeof(struct au1000_period), GFP_KERNEL); 181 if (! pointer->next) { 182 au1000_release_dma_link(stream); 183 return -ENOMEM; 184 } 185 pointer = pointer->next; 186 } 187 } 188 pointer->next = stream->buffer; 189 return 0; 190} 191 192static void 193au1000_dma_stop(struct audio_stream *stream) 194{ 195 snd_assert(stream->buffer, return); 196 disable_dma(stream->dma); 197} 198 199static void 200au1000_dma_start(struct audio_stream *stream) 201{ 202 snd_assert(stream->buffer, return); 203 204 init_dma(stream->dma); 205 if (get_dma_active_buffer(stream->dma) == 0) { 206 clear_dma_done0(stream->dma); 207 set_dma_addr0(stream->dma, stream->buffer->start); 208 set_dma_count0(stream->dma, stream->period_size >> 1); 209 set_dma_addr1(stream->dma, stream->buffer->next->start); 210 set_dma_count1(stream->dma, stream->period_size >> 1); 211 } else { 212 clear_dma_done1(stream->dma); 213 set_dma_addr1(stream->dma, stream->buffer->start); 214 set_dma_count1(stream->dma, stream->period_size >> 1); 215 set_dma_addr0(stream->dma, stream->buffer->next->start); 216 set_dma_count0(stream->dma, stream->period_size >> 1); 217 } 218 enable_dma_buffers(stream->dma); 219 start_dma(stream->dma); 220} 221 222static irqreturn_t 223au1000_dma_interrupt(int irq, void *dev_id) 224{ 225 struct audio_stream *stream = (struct audio_stream *) dev_id; 226 struct snd_pcm_substream *substream = stream->substream; 227 228 spin_lock(&stream->dma_lock); 229 switch (get_dma_buffer_done(stream->dma)) { 230 case DMA_D0: 231 stream->buffer = stream->buffer->next; 232 clear_dma_done0(stream->dma); 233 set_dma_addr0(stream->dma, stream->buffer->next->start); 234 set_dma_count0(stream->dma, stream->period_size >> 1); 235 enable_dma_buffer0(stream->dma); 236 break; 237 case DMA_D1: 238 stream->buffer = stream->buffer->next; 239 clear_dma_done1(stream->dma); 240 set_dma_addr1(stream->dma, stream->buffer->next->start); 241 set_dma_count1(stream->dma, stream->period_size >> 1); 242 enable_dma_buffer1(stream->dma); 243 break; 244 case (DMA_D0 | DMA_D1): 245 printk(KERN_ERR "DMA %d missed interrupt.\n",stream->dma); 246 au1000_dma_stop(stream); 247 au1000_dma_start(stream); 248 break; 249 case (~DMA_D0 & ~DMA_D1): 250 printk(KERN_ERR "DMA %d empty irq.\n",stream->dma); 251 } 252 spin_unlock(&stream->dma_lock); 253 snd_pcm_period_elapsed(substream); 254 return IRQ_HANDLED; 255} 256 257/*-------------------------- PCM Audio Streams -------------------------------*/ 258 259static unsigned int rates[] = {8000, 11025, 16000, 22050}; 260static struct snd_pcm_hw_constraint_list hw_constraints_rates = { 261 .count = ARRAY_SIZE(rates), 262 .list = rates, 263 .mask = 0, 264}; 265 266static struct snd_pcm_hardware snd_au1000_hw = 267{ 268 .info = (SNDRV_PCM_INFO_INTERLEAVED | \ 269 SNDRV_PCM_INFO_MMAP | SNDRV_PCM_INFO_MMAP_VALID), 270 .formats = SNDRV_PCM_FMTBIT_S16_LE, 271 .rates = (SNDRV_PCM_RATE_8000 | SNDRV_PCM_RATE_11025 | 272 SNDRV_PCM_RATE_16000 | SNDRV_PCM_RATE_22050), 273 .rate_min = 8000, 274 .rate_max = 22050, 275 .channels_min = 1, 276 .channels_max = 2, 277 .buffer_bytes_max = 128*1024, 278 .period_bytes_min = 32, 279 .period_bytes_max = 16*1024, 280 .periods_min = 8, 281 .periods_max = 255, 282 .fifo_size = 16, 283}; 284 285static int 286snd_au1000_playback_open(struct snd_pcm_substream *substream) 287{ 288 struct snd_au1000 *au1000 = substream->pcm->private_data; 289 290 au1000->stream[PLAYBACK]->substream = substream; 291 au1000->stream[PLAYBACK]->buffer = NULL; 292 substream->private_data = au1000->stream[PLAYBACK]; 293 substream->runtime->hw = snd_au1000_hw; 294 return (snd_pcm_hw_constraint_list(substream->runtime, 0, 295 SNDRV_PCM_HW_PARAM_RATE, &hw_constraints_rates) < 0); 296} 297 298static int 299snd_au1000_capture_open(struct snd_pcm_substream *substream) 300{ 301 struct snd_au1000 *au1000 = substream->pcm->private_data; 302 303 au1000->stream[CAPTURE]->substream = substream; 304 au1000->stream[CAPTURE]->buffer = NULL; 305 substream->private_data = au1000->stream[CAPTURE]; 306 substream->runtime->hw = snd_au1000_hw; 307 return (snd_pcm_hw_constraint_list(substream->runtime, 0, 308 SNDRV_PCM_HW_PARAM_RATE, &hw_constraints_rates) < 0); 309} 310 311static int 312snd_au1000_playback_close(struct snd_pcm_substream *substream) 313{ 314 struct snd_au1000 *au1000 = substream->pcm->private_data; 315 316 au1000->stream[PLAYBACK]->substream = NULL; 317 return 0; 318} 319 320static int 321snd_au1000_capture_close(struct snd_pcm_substream *substream) 322{ 323 struct snd_au1000 *au1000 = substream->pcm->private_data; 324 325 au1000->stream[CAPTURE]->substream = NULL; 326 return 0; 327} 328 329static int 330snd_au1000_hw_params(struct snd_pcm_substream *substream, 331 struct snd_pcm_hw_params *hw_params) 332{ 333 struct audio_stream *stream = substream->private_data; 334 int err; 335 336 err = snd_pcm_lib_malloc_pages(substream, 337 params_buffer_bytes(hw_params)); 338 if (err < 0) 339 return err; 340 return au1000_setup_dma_link(stream, 341 params_period_bytes(hw_params), 342 params_periods(hw_params)); 343} 344 345static int 346snd_au1000_hw_free(struct snd_pcm_substream *substream) 347{ 348 struct audio_stream *stream = substream->private_data; 349 au1000_release_dma_link(stream); 350 return snd_pcm_lib_free_pages(substream); 351} 352 353static int 354snd_au1000_playback_prepare(struct snd_pcm_substream *substream) 355{ 356 struct snd_au1000 *au1000 = substream->pcm->private_data; 357 struct snd_pcm_runtime *runtime = substream->runtime; 358 359 if (runtime->channels == 1) 360 au1000_set_ac97_xmit_slots(au1000, AC97_SLOT_4); 361 else 362 au1000_set_ac97_xmit_slots(au1000, AC97_SLOT_3 | AC97_SLOT_4); 363 snd_ac97_set_rate(au1000->ac97, AC97_PCM_FRONT_DAC_RATE, runtime->rate); 364 return 0; 365} 366 367static int 368snd_au1000_capture_prepare(struct snd_pcm_substream *substream) 369{ 370 struct snd_au1000 *au1000 = substream->pcm->private_data; 371 struct snd_pcm_runtime *runtime = substream->runtime; 372 373 if (runtime->channels == 1) 374 au1000_set_ac97_recv_slots(au1000, AC97_SLOT_4); 375 else 376 au1000_set_ac97_recv_slots(au1000, AC97_SLOT_3 | AC97_SLOT_4); 377 snd_ac97_set_rate(au1000->ac97, AC97_PCM_LR_ADC_RATE, runtime->rate); 378 return 0; 379} 380 381static int 382snd_au1000_trigger(struct snd_pcm_substream *substream, int cmd) 383{ 384 struct audio_stream *stream = substream->private_data; 385 int err = 0; 386 387 spin_lock(&stream->dma_lock); 388 switch (cmd) { 389 case SNDRV_PCM_TRIGGER_START: 390 au1000_dma_start(stream); 391 break; 392 case SNDRV_PCM_TRIGGER_STOP: 393 au1000_dma_stop(stream); 394 break; 395 default: 396 err = -EINVAL; 397 break; 398 } 399 spin_unlock(&stream->dma_lock); 400 return err; 401} 402 403static snd_pcm_uframes_t 404snd_au1000_pointer(struct snd_pcm_substream *substream) 405{ 406 struct audio_stream *stream = substream->private_data; 407 struct snd_pcm_runtime *runtime = substream->runtime; 408 long location; 409 410 spin_lock(&stream->dma_lock); 411 location = get_dma_residue(stream->dma); 412 spin_unlock(&stream->dma_lock); 413 location = stream->buffer->relative_end - location; 414 if (location == -1) 415 location = 0; 416 return bytes_to_frames(runtime,location); 417} 418 419static struct snd_pcm_ops snd_card_au1000_playback_ops = { 420 .open = snd_au1000_playback_open, 421 .close = snd_au1000_playback_close, 422 .ioctl = snd_pcm_lib_ioctl, 423 .hw_params = snd_au1000_hw_params, 424 .hw_free = snd_au1000_hw_free, 425 .prepare = snd_au1000_playback_prepare, 426 .trigger = snd_au1000_trigger, 427 .pointer = snd_au1000_pointer, 428}; 429 430static struct snd_pcm_ops snd_card_au1000_capture_ops = { 431 .open = snd_au1000_capture_open, 432 .close = snd_au1000_capture_close, 433 .ioctl = snd_pcm_lib_ioctl, 434 .hw_params = snd_au1000_hw_params, 435 .hw_free = snd_au1000_hw_free, 436 .prepare = snd_au1000_capture_prepare, 437 .trigger = snd_au1000_trigger, 438 .pointer = snd_au1000_pointer, 439}; 440 441static int __devinit 442snd_au1000_pcm_new(struct snd_au1000 *au1000) 443{ 444 struct snd_pcm *pcm; 445 int err; 446 unsigned long flags; 447 448 if ((err = snd_pcm_new(au1000->card, "AU1000 AC97 PCM", 0, 1, 1, &pcm)) < 0) 449 return err; 450 451 snd_pcm_lib_preallocate_pages_for_all(pcm, SNDRV_DMA_TYPE_CONTINUOUS, 452 snd_dma_continuous_data(GFP_KERNEL), 128*1024, 128*1024); 453 454 snd_pcm_set_ops(pcm, SNDRV_PCM_STREAM_PLAYBACK, 455 &snd_card_au1000_playback_ops); 456 snd_pcm_set_ops(pcm, SNDRV_PCM_STREAM_CAPTURE, 457 &snd_card_au1000_capture_ops); 458 459 pcm->private_data = au1000; 460 pcm->info_flags = 0; 461 strcpy(pcm->name, "Au1000 AC97 PCM"); 462 463 spin_lock_init(&au1000->stream[PLAYBACK]->dma_lock); 464 spin_lock_init(&au1000->stream[CAPTURE]->dma_lock); 465 466 flags = claim_dma_lock(); 467 if ((au1000->stream[PLAYBACK]->dma = request_au1000_dma(DMA_ID_AC97C_TX, 468 "AC97 TX", au1000_dma_interrupt, IRQF_DISABLED, 469 au1000->stream[PLAYBACK])) < 0) { 470 release_dma_lock(flags); 471 return -EBUSY; 472 } 473 if ((au1000->stream[CAPTURE]->dma = request_au1000_dma(DMA_ID_AC97C_RX, 474 "AC97 RX", au1000_dma_interrupt, IRQF_DISABLED, 475 au1000->stream[CAPTURE])) < 0){ 476 release_dma_lock(flags); 477 return -EBUSY; 478 } 479 /* enable DMA coherency in read/write DMA channels */ 480 set_dma_mode(au1000->stream[PLAYBACK]->dma, 481 get_dma_mode(au1000->stream[PLAYBACK]->dma) & ~DMA_NC); 482 set_dma_mode(au1000->stream[CAPTURE]->dma, 483 get_dma_mode(au1000->stream[CAPTURE]->dma) & ~DMA_NC); 484 release_dma_lock(flags); 485 au1000->pcm = pcm; 486 return 0; 487} 488 489 490/*-------------------------- AC97 CODEC Control ------------------------------*/ 491 492static unsigned short 493snd_au1000_ac97_read(struct snd_ac97 *ac97, unsigned short reg) 494{ 495 struct snd_au1000 *au1000 = ac97->private_data; 496 u32 volatile cmd; 497 u16 volatile data; 498 int i; 499 500 spin_lock(&au1000->ac97_lock); 501/* would rather use the interupt than this polling but it works and I can't 502get the interupt driven case to work efficiently */ 503 for (i = 0; i < 0x5000; i++) 504 if (!(au1000->ac97_ioport->status & AC97C_CP)) 505 break; 506 if (i == 0x5000) 507 printk(KERN_ERR "au1000 AC97: AC97 command read timeout\n"); 508 509 cmd = (u32) reg & AC97C_INDEX_MASK; 510 cmd |= AC97C_READ; 511 au1000->ac97_ioport->cmd = cmd; 512 513 /* now wait for the data */ 514 for (i = 0; i < 0x5000; i++) 515 if (!(au1000->ac97_ioport->status & AC97C_CP)) 516 break; 517 if (i == 0x5000) { 518 printk(KERN_ERR "au1000 AC97: AC97 command read timeout\n"); 519 return 0; 520 } 521 522 data = au1000->ac97_ioport->cmd & 0xffff; 523 spin_unlock(&au1000->ac97_lock); 524 525 return data; 526 527} 528 529 530static void 531snd_au1000_ac97_write(struct snd_ac97 *ac97, unsigned short reg, unsigned short val) 532{ 533 struct snd_au1000 *au1000 = ac97->private_data; 534 u32 cmd; 535 int i; 536 537 spin_lock(&au1000->ac97_lock); 538/* would rather use the interupt than this polling but it works and I can't 539get the interupt driven case to work efficiently */ 540 for (i = 0; i < 0x5000; i++) 541 if (!(au1000->ac97_ioport->status & AC97C_CP)) 542 break; 543 if (i == 0x5000) 544 printk(KERN_ERR "au1000 AC97: AC97 command write timeout\n"); 545 546 cmd = (u32) reg & AC97C_INDEX_MASK; 547 cmd &= ~AC97C_READ; 548 cmd |= ((u32) val << AC97C_WD_BIT); 549 au1000->ac97_ioport->cmd = cmd; 550 spin_unlock(&au1000->ac97_lock); 551} 552 553static int __devinit 554snd_au1000_ac97_new(struct snd_au1000 *au1000) 555{ 556 int err; 557 struct snd_ac97_bus *pbus; 558 struct snd_ac97_template ac97; 559 static struct snd_ac97_bus_ops ops = { 560 .write = snd_au1000_ac97_write, 561 .read = snd_au1000_ac97_read, 562 }; 563 564 if ((au1000->ac97_res_port = request_mem_region(CPHYSADDR(AC97C_CONFIG), 565 0x100000, "Au1x00 AC97")) == NULL) { 566 snd_printk(KERN_ERR "ALSA AC97: can't grap AC97 port\n"); 567 return -EBUSY; 568 } 569 au1000->ac97_ioport = (struct au1000_ac97_reg *) 570 KSEG1ADDR(au1000->ac97_res_port->start); 571 572 spin_lock_init(&au1000->ac97_lock); 573 574 /* configure pins for AC'97 575 TODO: move to board_setup.c */ 576 au_writel(au_readl(SYS_PINFUNC) & ~0x02, SYS_PINFUNC); 577 578 /* Initialise Au1000's AC'97 Control Block */ 579 au1000->ac97_ioport->cntrl = AC97C_RS | AC97C_CE; 580 udelay(10); 581 au1000->ac97_ioport->cntrl = AC97C_CE; 582 udelay(10); 583 584 /* Initialise External CODEC -- cold reset */ 585 au1000->ac97_ioport->config = AC97C_RESET; 586 udelay(10); 587 au1000->ac97_ioport->config = 0x0; 588 mdelay(5); 589 590 /* Initialise AC97 middle-layer */ 591 if ((err = snd_ac97_bus(au1000->card, 0, &ops, au1000, &pbus)) < 0) 592 return err; 593 594 memset(&ac97, 0, sizeof(ac97)); 595 ac97.private_data = au1000; 596 if ((err = snd_ac97_mixer(pbus, &ac97, &au1000->ac97)) < 0) 597 return err; 598 599 return 0; 600} 601 602/*------------------------------ Setup / Destroy ----------------------------*/ 603 604void 605snd_au1000_free(struct snd_card *card) 606{ 607 struct snd_au1000 *au1000 = card->private_data; 608 609 if (au1000->ac97_res_port) { 610 /* put internal AC97 block into reset */ 611 au1000->ac97_ioport->cntrl = AC97C_RS; 612 au1000->ac97_ioport = NULL; 613 release_and_free_resource(au1000->ac97_res_port); 614 } 615 616 if (au1000->stream[PLAYBACK]) { 617 if (au1000->stream[PLAYBACK]->dma >= 0) 618 free_au1000_dma(au1000->stream[PLAYBACK]->dma); 619 kfree(au1000->stream[PLAYBACK]); 620 } 621 622 if (au1000->stream[CAPTURE]) { 623 if (au1000->stream[CAPTURE]->dma >= 0) 624 free_au1000_dma(au1000->stream[CAPTURE]->dma); 625 kfree(au1000->stream[CAPTURE]); 626 } 627} 628 629 630static struct snd_card *au1000_card; 631 632static int __init 633au1000_init(void) 634{ 635 int err; 636 struct snd_card *card; 637 struct snd_au1000 *au1000; 638 639 card = snd_card_new(-1, "AC97", THIS_MODULE, sizeof(struct snd_au1000)); 640 if (card == NULL) 641 return -ENOMEM; 642 643 card->private_free = snd_au1000_free; 644 au1000 = card->private_data; 645 au1000->card = card; 646 647 au1000->stream[PLAYBACK] = kmalloc(sizeof(struct audio_stream), GFP_KERNEL); 648 au1000->stream[CAPTURE ] = kmalloc(sizeof(struct audio_stream), GFP_KERNEL); 649 /* so that snd_au1000_free will work as intended */ 650 au1000->ac97_res_port = NULL; 651 if (au1000->stream[PLAYBACK]) 652 au1000->stream[PLAYBACK]->dma = -1; 653 if (au1000->stream[CAPTURE ]) 654 au1000->stream[CAPTURE ]->dma = -1; 655 656 if (au1000->stream[PLAYBACK] == NULL || 657 au1000->stream[CAPTURE ] == NULL) { 658 snd_card_free(card); 659 return -ENOMEM; 660 } 661 662 if ((err = snd_au1000_ac97_new(au1000)) < 0 ) { 663 snd_card_free(card); 664 return err; 665 } 666 667 if ((err = snd_au1000_pcm_new(au1000)) < 0) { 668 snd_card_free(card); 669 return err; 670 } 671 672 strcpy(card->driver, "Au1000-AC97"); 673 strcpy(card->shortname, "AMD Au1000-AC97"); 674 sprintf(card->longname, "AMD Au1000--AC97 ALSA Driver"); 675 676 if ((err = snd_card_register(card)) < 0) { 677 snd_card_free(card); 678 return err; 679 } 680 681 printk( KERN_INFO "ALSA AC97: Driver Initialized\n" ); 682 au1000_card = card; 683 return 0; 684} 685 686static void __exit au1000_exit(void) 687{ 688 snd_card_free(au1000_card); 689} 690 691module_init(au1000_init); 692module_exit(au1000_exit); 693