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au1x00.c
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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 <[email protected]>
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 <linux/init.h>
40 #include <linux/slab.h>
41 #include <linux/module.h>
42 #include <sound/core.h>
43 #include <sound/initval.h>
44 #include <sound/pcm.h>
45 #include <sound/pcm_params.h>
46 #include <sound/ac97_codec.h>
47 #include <asm/mach-au1x00/au1000.h>
49 
50 MODULE_AUTHOR("Charles Eidsness <[email protected]>");
51 MODULE_DESCRIPTION("Au1000 AC'97 ALSA Driver");
52 MODULE_LICENSE("GPL");
53 MODULE_SUPPORTED_DEVICE("{{AMD,Au1000 AC'97}}");
54 
55 #define PLAYBACK 0
56 #define CAPTURE 1
57 #define AC97_SLOT_3 0x01
58 #define AC97_SLOT_4 0x02
59 #define AC97_SLOT_6 0x08
60 #define AC97_CMD_IRQ 31
61 #define READ 0
62 #define WRITE 1
63 #define READ_WAIT 2
64 #define RW_DONE 3
65 
67 {
69  u32 relative_end; /*realtive to start of buffer*/
70  struct au1000_period * next;
71 };
72 
73 /*Au1000 AC97 Port Control Reisters*/
75  u32 volatile config;
76  u32 volatile status;
77  u32 volatile data;
78  u32 volatile cmd;
79  u32 volatile cntrl;
80 };
81 
82 struct audio_stream {
84  int dma;
87  unsigned int period_size;
88  unsigned int periods;
89 };
90 
91 struct snd_au1000 {
92  struct snd_card *card;
93  struct au1000_ac97_reg volatile *ac97_ioport;
94 
97  struct snd_ac97 *ac97;
98 
99  struct snd_pcm *pcm;
100  struct audio_stream *stream[2]; /* playback & capture */
101 };
102 
103 /*--------------------------- Local Functions --------------------------------*/
104 static void
105 au1000_set_ac97_xmit_slots(struct snd_au1000 *au1000, long xmit_slots)
106 {
107  u32 volatile ac97_config;
108 
109  spin_lock(&au1000->ac97_lock);
110  ac97_config = au1000->ac97_ioport->config;
111  ac97_config = ac97_config & ~AC97C_XMIT_SLOTS_MASK;
112  ac97_config |= (xmit_slots << AC97C_XMIT_SLOTS_BIT);
113  au1000->ac97_ioport->config = ac97_config;
114  spin_unlock(&au1000->ac97_lock);
115 }
116 
117 static void
118 au1000_set_ac97_recv_slots(struct snd_au1000 *au1000, long recv_slots)
119 {
120  u32 volatile ac97_config;
121 
122  spin_lock(&au1000->ac97_lock);
123  ac97_config = au1000->ac97_ioport->config;
124  ac97_config = ac97_config & ~AC97C_RECV_SLOTS_MASK;
125  ac97_config |= (recv_slots << AC97C_RECV_SLOTS_BIT);
126  au1000->ac97_ioport->config = ac97_config;
127  spin_unlock(&au1000->ac97_lock);
128 }
129 
130 
131 static void
132 au1000_release_dma_link(struct audio_stream *stream)
133 {
134  struct au1000_period * pointer;
135  struct au1000_period * pointer_next;
136 
137  stream->period_size = 0;
138  stream->periods = 0;
139  pointer = stream->buffer;
140  if (! pointer)
141  return;
142  do {
143  pointer_next = pointer->next;
144  kfree(pointer);
145  pointer = pointer_next;
146  } while (pointer != stream->buffer);
147  stream->buffer = NULL;
148 }
149 
150 static int
151 au1000_setup_dma_link(struct audio_stream *stream, unsigned int period_bytes,
152  unsigned int periods)
153 {
154  struct snd_pcm_substream *substream = stream->substream;
155  struct snd_pcm_runtime *runtime = substream->runtime;
156  struct au1000_period *pointer;
157  unsigned long dma_start;
158  int i;
159 
160  dma_start = virt_to_phys(runtime->dma_area);
161 
162  if (stream->period_size == period_bytes &&
163  stream->periods == periods)
164  return 0; /* not changed */
165 
166  au1000_release_dma_link(stream);
167 
168  stream->period_size = period_bytes;
169  stream->periods = periods;
170 
171  stream->buffer = kmalloc(sizeof(struct au1000_period), GFP_KERNEL);
172  if (! stream->buffer)
173  return -ENOMEM;
174  pointer = stream->buffer;
175  for (i = 0; i < periods; i++) {
176  pointer->start = (u32)(dma_start + (i * period_bytes));
177  pointer->relative_end = (u32) (((i+1) * period_bytes) - 0x1);
178  if (i < periods - 1) {
179  pointer->next = kmalloc(sizeof(struct au1000_period), GFP_KERNEL);
180  if (! pointer->next) {
181  au1000_release_dma_link(stream);
182  return -ENOMEM;
183  }
184  pointer = pointer->next;
185  }
186  }
187  pointer->next = stream->buffer;
188  return 0;
189 }
190 
191 static void
192 au1000_dma_stop(struct audio_stream *stream)
193 {
194  if (snd_BUG_ON(!stream->buffer))
195  return;
196  disable_dma(stream->dma);
197 }
198 
199 static void
200 au1000_dma_start(struct audio_stream *stream)
201 {
202  if (snd_BUG_ON(!stream->buffer))
203  return;
204 
205  init_dma(stream->dma);
206  if (get_dma_active_buffer(stream->dma) == 0) {
207  clear_dma_done0(stream->dma);
208  set_dma_addr0(stream->dma, stream->buffer->start);
209  set_dma_count0(stream->dma, stream->period_size >> 1);
210  set_dma_addr1(stream->dma, stream->buffer->next->start);
211  set_dma_count1(stream->dma, stream->period_size >> 1);
212  } else {
213  clear_dma_done1(stream->dma);
214  set_dma_addr1(stream->dma, stream->buffer->start);
215  set_dma_count1(stream->dma, stream->period_size >> 1);
216  set_dma_addr0(stream->dma, stream->buffer->next->start);
217  set_dma_count0(stream->dma, stream->period_size >> 1);
218  }
219  enable_dma_buffers(stream->dma);
220  start_dma(stream->dma);
221 }
222 
223 static irqreturn_t
224 au1000_dma_interrupt(int irq, void *dev_id)
225 {
226  struct audio_stream *stream = (struct audio_stream *) dev_id;
227  struct snd_pcm_substream *substream = stream->substream;
228 
229  spin_lock(&stream->dma_lock);
230  switch (get_dma_buffer_done(stream->dma)) {
231  case DMA_D0:
232  stream->buffer = stream->buffer->next;
233  clear_dma_done0(stream->dma);
234  set_dma_addr0(stream->dma, stream->buffer->next->start);
235  set_dma_count0(stream->dma, stream->period_size >> 1);
236  enable_dma_buffer0(stream->dma);
237  break;
238  case DMA_D1:
239  stream->buffer = stream->buffer->next;
240  clear_dma_done1(stream->dma);
241  set_dma_addr1(stream->dma, stream->buffer->next->start);
242  set_dma_count1(stream->dma, stream->period_size >> 1);
243  enable_dma_buffer1(stream->dma);
244  break;
245  case (DMA_D0 | DMA_D1):
246  printk(KERN_ERR "DMA %d missed interrupt.\n",stream->dma);
247  au1000_dma_stop(stream);
248  au1000_dma_start(stream);
249  break;
250  case (~DMA_D0 & ~DMA_D1):
251  printk(KERN_ERR "DMA %d empty irq.\n",stream->dma);
252  }
253  spin_unlock(&stream->dma_lock);
254  snd_pcm_period_elapsed(substream);
255  return IRQ_HANDLED;
256 }
257 
258 /*-------------------------- PCM Audio Streams -------------------------------*/
259 
260 static unsigned int rates[] = {8000, 11025, 16000, 22050};
261 static struct snd_pcm_hw_constraint_list hw_constraints_rates = {
262  .count = ARRAY_SIZE(rates),
263  .list = rates,
264  .mask = 0,
265 };
266 
267 static struct snd_pcm_hardware snd_au1000_hw =
268 {
269  .info = (SNDRV_PCM_INFO_INTERLEAVED | \
270  SNDRV_PCM_INFO_MMAP | SNDRV_PCM_INFO_MMAP_VALID),
274  .rate_min = 8000,
275  .rate_max = 22050,
276  .channels_min = 1,
277  .channels_max = 2,
278  .buffer_bytes_max = 128*1024,
279  .period_bytes_min = 32,
280  .period_bytes_max = 16*1024,
281  .periods_min = 8,
282  .periods_max = 255,
283  .fifo_size = 16,
284 };
285 
286 static int
287 snd_au1000_playback_open(struct snd_pcm_substream *substream)
288 {
289  struct snd_au1000 *au1000 = substream->pcm->private_data;
290 
291  au1000->stream[PLAYBACK]->substream = substream;
292  au1000->stream[PLAYBACK]->buffer = NULL;
293  substream->private_data = au1000->stream[PLAYBACK];
294  substream->runtime->hw = snd_au1000_hw;
295  return (snd_pcm_hw_constraint_list(substream->runtime, 0,
296  SNDRV_PCM_HW_PARAM_RATE, &hw_constraints_rates) < 0);
297 }
298 
299 static int
300 snd_au1000_capture_open(struct snd_pcm_substream *substream)
301 {
302  struct snd_au1000 *au1000 = substream->pcm->private_data;
303 
304  au1000->stream[CAPTURE]->substream = substream;
305  au1000->stream[CAPTURE]->buffer = NULL;
306  substream->private_data = au1000->stream[CAPTURE];
307  substream->runtime->hw = snd_au1000_hw;
308  return (snd_pcm_hw_constraint_list(substream->runtime, 0,
309  SNDRV_PCM_HW_PARAM_RATE, &hw_constraints_rates) < 0);
310 }
311 
312 static int
313 snd_au1000_playback_close(struct snd_pcm_substream *substream)
314 {
315  struct snd_au1000 *au1000 = substream->pcm->private_data;
316 
317  au1000->stream[PLAYBACK]->substream = NULL;
318  return 0;
319 }
320 
321 static int
322 snd_au1000_capture_close(struct snd_pcm_substream *substream)
323 {
324  struct snd_au1000 *au1000 = substream->pcm->private_data;
325 
326  au1000->stream[CAPTURE]->substream = NULL;
327  return 0;
328 }
329 
330 static int
331 snd_au1000_hw_params(struct snd_pcm_substream *substream,
332  struct snd_pcm_hw_params *hw_params)
333 {
334  struct audio_stream *stream = substream->private_data;
335  int err;
336 
337  err = snd_pcm_lib_malloc_pages(substream,
338  params_buffer_bytes(hw_params));
339  if (err < 0)
340  return err;
341  return au1000_setup_dma_link(stream,
342  params_period_bytes(hw_params),
343  params_periods(hw_params));
344 }
345 
346 static int
347 snd_au1000_hw_free(struct snd_pcm_substream *substream)
348 {
349  struct audio_stream *stream = substream->private_data;
350  au1000_release_dma_link(stream);
351  return snd_pcm_lib_free_pages(substream);
352 }
353 
354 static int
355 snd_au1000_playback_prepare(struct snd_pcm_substream *substream)
356 {
357  struct snd_au1000 *au1000 = substream->pcm->private_data;
358  struct snd_pcm_runtime *runtime = substream->runtime;
359 
360  if (runtime->channels == 1)
361  au1000_set_ac97_xmit_slots(au1000, AC97_SLOT_4);
362  else
363  au1000_set_ac97_xmit_slots(au1000, AC97_SLOT_3 | AC97_SLOT_4);
365  return 0;
366 }
367 
368 static int
369 snd_au1000_capture_prepare(struct snd_pcm_substream *substream)
370 {
371  struct snd_au1000 *au1000 = substream->pcm->private_data;
372  struct snd_pcm_runtime *runtime = substream->runtime;
373 
374  if (runtime->channels == 1)
375  au1000_set_ac97_recv_slots(au1000, AC97_SLOT_4);
376  else
377  au1000_set_ac97_recv_slots(au1000, AC97_SLOT_3 | AC97_SLOT_4);
378  snd_ac97_set_rate(au1000->ac97, AC97_PCM_LR_ADC_RATE, runtime->rate);
379  return 0;
380 }
381 
382 static int
383 snd_au1000_trigger(struct snd_pcm_substream *substream, int cmd)
384 {
385  struct audio_stream *stream = substream->private_data;
386  int err = 0;
387 
388  spin_lock(&stream->dma_lock);
389  switch (cmd) {
391  au1000_dma_start(stream);
392  break;
394  au1000_dma_stop(stream);
395  break;
396  default:
397  err = -EINVAL;
398  break;
399  }
400  spin_unlock(&stream->dma_lock);
401  return err;
402 }
403 
404 static snd_pcm_uframes_t
405 snd_au1000_pointer(struct snd_pcm_substream *substream)
406 {
407  struct audio_stream *stream = substream->private_data;
408  struct snd_pcm_runtime *runtime = substream->runtime;
409  long location;
410 
411  spin_lock(&stream->dma_lock);
412  location = get_dma_residue(stream->dma);
413  spin_unlock(&stream->dma_lock);
414  location = stream->buffer->relative_end - location;
415  if (location == -1)
416  location = 0;
417  return bytes_to_frames(runtime,location);
418 }
419 
420 static struct snd_pcm_ops snd_card_au1000_playback_ops = {
421  .open = snd_au1000_playback_open,
422  .close = snd_au1000_playback_close,
423  .ioctl = snd_pcm_lib_ioctl,
424  .hw_params = snd_au1000_hw_params,
425  .hw_free = snd_au1000_hw_free,
426  .prepare = snd_au1000_playback_prepare,
427  .trigger = snd_au1000_trigger,
428  .pointer = snd_au1000_pointer,
429 };
430 
431 static struct snd_pcm_ops snd_card_au1000_capture_ops = {
432  .open = snd_au1000_capture_open,
433  .close = snd_au1000_capture_close,
434  .ioctl = snd_pcm_lib_ioctl,
435  .hw_params = snd_au1000_hw_params,
436  .hw_free = snd_au1000_hw_free,
437  .prepare = snd_au1000_capture_prepare,
438  .trigger = snd_au1000_trigger,
439  .pointer = snd_au1000_pointer,
440 };
441 
442 static int __devinit
443 snd_au1000_pcm_new(struct snd_au1000 *au1000)
444 {
445  struct snd_pcm *pcm;
446  int err;
447  unsigned long flags;
448 
449  if ((err = snd_pcm_new(au1000->card, "AU1000 AC97 PCM", 0, 1, 1, &pcm)) < 0)
450  return err;
451 
453  snd_dma_continuous_data(GFP_KERNEL), 128*1024, 128*1024);
454 
456  &snd_card_au1000_playback_ops);
458  &snd_card_au1000_capture_ops);
459 
460  pcm->private_data = au1000;
461  pcm->info_flags = 0;
462  strcpy(pcm->name, "Au1000 AC97 PCM");
463 
464  spin_lock_init(&au1000->stream[PLAYBACK]->dma_lock);
465  spin_lock_init(&au1000->stream[CAPTURE]->dma_lock);
466 
467  flags = claim_dma_lock();
468  if ((au1000->stream[PLAYBACK]->dma = request_au1000_dma(DMA_ID_AC97C_TX,
469  "AC97 TX", au1000_dma_interrupt, 0,
470  au1000->stream[PLAYBACK])) < 0) {
471  release_dma_lock(flags);
472  return -EBUSY;
473  }
474  if ((au1000->stream[CAPTURE]->dma = request_au1000_dma(DMA_ID_AC97C_RX,
475  "AC97 RX", au1000_dma_interrupt, 0,
476  au1000->stream[CAPTURE])) < 0){
477  release_dma_lock(flags);
478  return -EBUSY;
479  }
480  /* enable DMA coherency in read/write DMA channels */
481  set_dma_mode(au1000->stream[PLAYBACK]->dma,
482  get_dma_mode(au1000->stream[PLAYBACK]->dma) & ~DMA_NC);
483  set_dma_mode(au1000->stream[CAPTURE]->dma,
484  get_dma_mode(au1000->stream[CAPTURE]->dma) & ~DMA_NC);
485  release_dma_lock(flags);
486  au1000->pcm = pcm;
487  return 0;
488 }
489 
490 
491 /*-------------------------- AC97 CODEC Control ------------------------------*/
492 
493 static unsigned short
494 snd_au1000_ac97_read(struct snd_ac97 *ac97, unsigned short reg)
495 {
496  struct snd_au1000 *au1000 = ac97->private_data;
497  u32 volatile cmd;
498  u16 volatile data;
499  int i;
500 
501  spin_lock(&au1000->ac97_lock);
502 /* would rather use the interrupt than this polling but it works and I can't
503 get the interrupt driven case to work efficiently */
504  for (i = 0; i < 0x5000; i++)
505  if (!(au1000->ac97_ioport->status & AC97C_CP))
506  break;
507  if (i == 0x5000)
508  printk(KERN_ERR "au1000 AC97: AC97 command read timeout\n");
509 
510  cmd = (u32) reg & AC97C_INDEX_MASK;
511  cmd |= AC97C_READ;
512  au1000->ac97_ioport->cmd = cmd;
513 
514  /* now wait for the data */
515  for (i = 0; i < 0x5000; i++)
516  if (!(au1000->ac97_ioport->status & AC97C_CP))
517  break;
518  if (i == 0x5000) {
519  printk(KERN_ERR "au1000 AC97: AC97 command read timeout\n");
520  spin_unlock(&au1000->ac97_lock);
521  return 0;
522  }
523 
524  data = au1000->ac97_ioport->cmd & 0xffff;
525  spin_unlock(&au1000->ac97_lock);
526 
527  return data;
528 
529 }
530 
531 
532 static void
533 snd_au1000_ac97_write(struct snd_ac97 *ac97, unsigned short reg, unsigned short val)
534 {
535  struct snd_au1000 *au1000 = ac97->private_data;
536  u32 cmd;
537  int i;
538 
539  spin_lock(&au1000->ac97_lock);
540 /* would rather use the interrupt than this polling but it works and I can't
541 get the interrupt driven case to work efficiently */
542  for (i = 0; i < 0x5000; i++)
543  if (!(au1000->ac97_ioport->status & AC97C_CP))
544  break;
545  if (i == 0x5000)
546  printk(KERN_ERR "au1000 AC97: AC97 command write timeout\n");
547 
548  cmd = (u32) reg & AC97C_INDEX_MASK;
549  cmd &= ~AC97C_READ;
550  cmd |= ((u32) val << AC97C_WD_BIT);
551  au1000->ac97_ioport->cmd = cmd;
552  spin_unlock(&au1000->ac97_lock);
553 }
554 
555 static int __devinit
556 snd_au1000_ac97_new(struct snd_au1000 *au1000)
557 {
558  int err;
559  struct snd_ac97_bus *pbus;
560  struct snd_ac97_template ac97;
561  static struct snd_ac97_bus_ops ops = {
562  .write = snd_au1000_ac97_write,
563  .read = snd_au1000_ac97_read,
564  };
565 
567  0x100000, "Au1x00 AC97")) == NULL) {
568  snd_printk(KERN_ERR "ALSA AC97: can't grap AC97 port\n");
569  return -EBUSY;
570  }
571  au1000->ac97_ioport = (struct au1000_ac97_reg *)
572  KSEG1ADDR(au1000->ac97_res_port->start);
573 
574  spin_lock_init(&au1000->ac97_lock);
575 
576  /* configure pins for AC'97
577  TODO: move to board_setup.c */
578  au_writel(au_readl(SYS_PINFUNC) & ~0x02, SYS_PINFUNC);
579 
580  /* Initialise Au1000's AC'97 Control Block */
581  au1000->ac97_ioport->cntrl = AC97C_RS | AC97C_CE;
582  udelay(10);
583  au1000->ac97_ioport->cntrl = AC97C_CE;
584  udelay(10);
585 
586  /* Initialise External CODEC -- cold reset */
587  au1000->ac97_ioport->config = AC97C_RESET;
588  udelay(10);
589  au1000->ac97_ioport->config = 0x0;
590  mdelay(5);
591 
592  /* Initialise AC97 middle-layer */
593  if ((err = snd_ac97_bus(au1000->card, 0, &ops, au1000, &pbus)) < 0)
594  return err;
595 
596  memset(&ac97, 0, sizeof(ac97));
597  ac97.private_data = au1000;
598  if ((err = snd_ac97_mixer(pbus, &ac97, &au1000->ac97)) < 0)
599  return err;
600 
601  return 0;
602 }
603 
604 /*------------------------------ Setup / Destroy ----------------------------*/
605 
606 void
608 {
609  struct snd_au1000 *au1000 = card->private_data;
610 
611  if (au1000->ac97_res_port) {
612  /* put internal AC97 block into reset */
613  au1000->ac97_ioport->cntrl = AC97C_RS;
614  au1000->ac97_ioport = NULL;
616  }
617 
618  if (au1000->stream[PLAYBACK]) {
619  if (au1000->stream[PLAYBACK]->dma >= 0)
620  free_au1000_dma(au1000->stream[PLAYBACK]->dma);
621  kfree(au1000->stream[PLAYBACK]);
622  }
623 
624  if (au1000->stream[CAPTURE]) {
625  if (au1000->stream[CAPTURE]->dma >= 0)
626  free_au1000_dma(au1000->stream[CAPTURE]->dma);
627  kfree(au1000->stream[CAPTURE]);
628  }
629 }
630 
631 
632 static struct snd_card *au1000_card;
633 
634 static int __init
635 au1000_init(void)
636 {
637  int err;
638  struct snd_card *card;
639  struct snd_au1000 *au1000;
640 
641  err = snd_card_create(-1, "AC97", THIS_MODULE,
642  sizeof(struct snd_au1000), &card);
643  if (err < 0)
644  return err;
645 
647  au1000 = card->private_data;
648  au1000->card = card;
649 
650  au1000->stream[PLAYBACK] = kmalloc(sizeof(struct audio_stream), GFP_KERNEL);
651  au1000->stream[CAPTURE ] = kmalloc(sizeof(struct audio_stream), GFP_KERNEL);
652  /* so that snd_au1000_free will work as intended */
653  au1000->ac97_res_port = NULL;
654  if (au1000->stream[PLAYBACK])
655  au1000->stream[PLAYBACK]->dma = -1;
656  if (au1000->stream[CAPTURE ])
657  au1000->stream[CAPTURE ]->dma = -1;
658 
659  if (au1000->stream[PLAYBACK] == NULL ||
660  au1000->stream[CAPTURE ] == NULL) {
661  snd_card_free(card);
662  return -ENOMEM;
663  }
664 
665  if ((err = snd_au1000_ac97_new(au1000)) < 0 ) {
666  snd_card_free(card);
667  return err;
668  }
669 
670  if ((err = snd_au1000_pcm_new(au1000)) < 0) {
671  snd_card_free(card);
672  return err;
673  }
674 
675  strcpy(card->driver, "Au1000-AC97");
676  strcpy(card->shortname, "AMD Au1000-AC97");
677  sprintf(card->longname, "AMD Au1000--AC97 ALSA Driver");
678 
679  if ((err = snd_card_register(card)) < 0) {
680  snd_card_free(card);
681  return err;
682  }
683 
684  printk(KERN_INFO "ALSA AC97: Driver Initialized\n");
685  au1000_card = card;
686  return 0;
687 }
688 
689 static void __exit au1000_exit(void)
690 {
691  snd_card_free(au1000_card);
692 }
693 
694 module_init(au1000_init);
695 module_exit(au1000_exit);
696