[ALSA] Remove snd_card_generic_dev()
[linux-2.6.git] / sound / mips / au1x00.c
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/ac97_codec.h>
47 #include <asm/mach-au1x00/au1000.h>
48 #include <asm/mach-au1x00/au1000_dma.h>
49
50 MODULE_AUTHOR("Charles Eidsness <charles@cooper-street.com>");
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
66 struct au1000_period
67 {
68         u32 start;
69         u32 relative_end;       /*realtive to start of buffer*/
70         struct au1000_period * next;
71 };
72
73 /*Au1000 AC97 Port Control Reisters*/
74 struct au1000_ac97_reg {
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 {
83         struct snd_pcm_substream *substream;
84         int dma;
85         spinlock_t dma_lock;
86         struct au1000_period * buffer;
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
95         struct resource *ac97_res_port;
96         spinlock_t ac97_lock;
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         unsigned long dma_start;
157         int i;
158
159         dma_start = virt_to_phys(runtime->dma_area);
160
161         if (stream->period_size == period_bytes &&
162             stream->periods == periods)
163                 return 0; /* not changed */
164
165         au1000_release_dma_link(stream);
166
167         stream->period_size = period_bytes;
168         stream->periods = periods;
169
170         stream->buffer = kmalloc(sizeof(struct au1000_period), GFP_KERNEL);
171         if (! stream->buffer)
172                 return -ENOMEM;
173         pointer = stream->buffer;
174         for (i = 0; i < periods; i++) {
175                 pointer->start = (u32)(dma_start + (i * period_bytes));
176                 pointer->relative_end = (u32) (((i+1) * period_bytes) - 0x1);
177                 if (i < periods - 1) {
178                         pointer->next = kmalloc(sizeof(struct au1000_period), GFP_KERNEL);
179                         if (! pointer->next) {
180                                 au1000_release_dma_link(stream);
181                                 return -ENOMEM;
182                         }
183                         pointer = pointer->next;
184                 }
185         }
186         pointer->next = stream->buffer;
187         return 0;
188 }
189
190 static void
191 au1000_dma_stop(struct audio_stream *stream)
192 {
193         snd_assert(stream->buffer, return);
194         disable_dma(stream->dma);
195 }
196
197 static void
198 au1000_dma_start(struct audio_stream *stream)
199 {
200         snd_assert(stream->buffer, return);
201
202         init_dma(stream->dma);
203         if (get_dma_active_buffer(stream->dma) == 0) {
204                 clear_dma_done0(stream->dma);
205                 set_dma_addr0(stream->dma, stream->buffer->start);
206                 set_dma_count0(stream->dma, stream->period_size >> 1);
207                 set_dma_addr1(stream->dma, stream->buffer->next->start);
208                 set_dma_count1(stream->dma, stream->period_size >> 1);
209         } else {
210                 clear_dma_done1(stream->dma);
211                 set_dma_addr1(stream->dma, stream->buffer->start);
212                 set_dma_count1(stream->dma, stream->period_size >> 1);
213                 set_dma_addr0(stream->dma, stream->buffer->next->start);
214                 set_dma_count0(stream->dma, stream->period_size >> 1);
215         }
216         enable_dma_buffers(stream->dma);
217         start_dma(stream->dma);
218 }
219
220 static irqreturn_t
221 au1000_dma_interrupt(int irq, void *dev_id, struct pt_regs *regs)
222 {
223         struct audio_stream *stream = (struct audio_stream *) dev_id;
224         struct snd_pcm_substream *substream = stream->substream;
225
226         spin_lock(&stream->dma_lock);
227         switch (get_dma_buffer_done(stream->dma)) {
228         case DMA_D0:
229                 stream->buffer = stream->buffer->next;
230                 clear_dma_done0(stream->dma);
231                 set_dma_addr0(stream->dma, stream->buffer->next->start);
232                 set_dma_count0(stream->dma, stream->period_size >> 1);
233                 enable_dma_buffer0(stream->dma);
234                 break;
235         case DMA_D1:
236                 stream->buffer = stream->buffer->next;
237                 clear_dma_done1(stream->dma);
238                 set_dma_addr1(stream->dma, stream->buffer->next->start);
239                 set_dma_count1(stream->dma, stream->period_size >> 1);
240                 enable_dma_buffer1(stream->dma);
241                 break;
242         case (DMA_D0 | DMA_D1):
243                 printk(KERN_ERR "DMA %d missed interrupt.\n",stream->dma);
244                 au1000_dma_stop(stream);
245                 au1000_dma_start(stream);
246                 break;
247         case (~DMA_D0 & ~DMA_D1):
248                 printk(KERN_ERR "DMA %d empty irq.\n",stream->dma);
249         }
250         spin_unlock(&stream->dma_lock);
251         snd_pcm_period_elapsed(substream);
252         return IRQ_HANDLED;
253 }
254
255 /*-------------------------- PCM Audio Streams -------------------------------*/
256
257 static unsigned int rates[] = {8000, 11025, 16000, 22050};
258 static struct snd_pcm_hw_constraint_list hw_constraints_rates = {
259         .count  =  sizeof(rates) / sizeof(rates[0]),
260         .list   = rates,
261         .mask   = 0,
262 };
263
264 static struct snd_pcm_hardware snd_au1000_hw =
265 {
266         .info                   = (SNDRV_PCM_INFO_INTERLEAVED | \
267                                 SNDRV_PCM_INFO_MMAP | SNDRV_PCM_INFO_MMAP_VALID),
268         .formats                = SNDRV_PCM_FMTBIT_S16_LE,
269         .rates                  = (SNDRV_PCM_RATE_8000 | SNDRV_PCM_RATE_11025 |
270                                 SNDRV_PCM_RATE_16000 | SNDRV_PCM_RATE_22050),
271         .rate_min               = 8000,
272         .rate_max               = 22050,
273         .channels_min           = 1,
274         .channels_max           = 2,
275         .buffer_bytes_max       = 128*1024,
276         .period_bytes_min       = 32,
277         .period_bytes_max       = 16*1024,
278         .periods_min            = 8,
279         .periods_max            = 255,
280         .fifo_size              = 16,
281 };
282
283 static int
284 snd_au1000_playback_open(struct snd_pcm_substream *substream)
285 {
286         struct snd_au1000 *au1000 = substream->pcm->private_data;
287
288         au1000->stream[PLAYBACK]->substream = substream;
289         au1000->stream[PLAYBACK]->buffer = NULL;
290         substream->private_data = au1000->stream[PLAYBACK];
291         substream->runtime->hw = snd_au1000_hw;
292         return (snd_pcm_hw_constraint_list(substream->runtime, 0,
293                 SNDRV_PCM_HW_PARAM_RATE, &hw_constraints_rates) < 0);
294 }
295
296 static int
297 snd_au1000_capture_open(struct snd_pcm_substream *substream)
298 {
299         struct snd_au1000 *au1000 = substream->pcm->private_data;
300
301         au1000->stream[CAPTURE]->substream = substream;
302         au1000->stream[CAPTURE]->buffer = NULL;
303         substream->private_data = au1000->stream[CAPTURE];
304         substream->runtime->hw = snd_au1000_hw;
305         return (snd_pcm_hw_constraint_list(substream->runtime, 0,
306                 SNDRV_PCM_HW_PARAM_RATE, &hw_constraints_rates) < 0);
307 }
308
309 static int
310 snd_au1000_playback_close(struct snd_pcm_substream *substream)
311 {
312         struct snd_au1000 *au1000 = substream->pcm->private_data;
313
314         au1000->stream[PLAYBACK]->substream = NULL;
315         return 0;
316 }
317
318 static int
319 snd_au1000_capture_close(struct snd_pcm_substream *substream)
320 {
321         struct snd_au1000 *au1000 = substream->pcm->private_data;
322
323         au1000->stream[CAPTURE]->substream = NULL;
324         return 0;
325 }
326
327 static int
328 snd_au1000_hw_params(struct snd_pcm_substream *substream,
329                                         struct snd_pcm_hw_params *hw_params)
330 {
331         struct audio_stream *stream = substream->private_data;
332         int err;
333
334         err = snd_pcm_lib_malloc_pages(substream,
335                                        params_buffer_bytes(hw_params));
336         if (err < 0)
337                 return err;
338         return au1000_setup_dma_link(stream,
339                                      params_period_bytes(hw_params),
340                                      params_periods(hw_params));
341 }
342
343 static int
344 snd_au1000_hw_free(struct snd_pcm_substream *substream)
345 {
346         struct audio_stream *stream = substream->private_data;
347         au1000_release_dma_link(stream);
348         return snd_pcm_lib_free_pages(substream);
349 }
350
351 static int
352 snd_au1000_playback_prepare(struct snd_pcm_substream *substream)
353 {
354         struct snd_au1000 *au1000 = substream->pcm->private_data;
355         struct snd_pcm_runtime *runtime = substream->runtime;
356
357         if (runtime->channels == 1)
358                 au1000_set_ac97_xmit_slots(au1000, AC97_SLOT_4);
359         else
360                 au1000_set_ac97_xmit_slots(au1000, AC97_SLOT_3 | AC97_SLOT_4);
361         snd_ac97_set_rate(au1000->ac97, AC97_PCM_FRONT_DAC_RATE, runtime->rate);
362         return 0;
363 }
364
365 static int
366 snd_au1000_capture_prepare(struct snd_pcm_substream *substream)
367 {
368         struct snd_au1000 *au1000 = substream->pcm->private_data;
369         struct snd_pcm_runtime *runtime = substream->runtime;
370
371         if (runtime->channels == 1)
372                 au1000_set_ac97_recv_slots(au1000, AC97_SLOT_4);
373         else
374                 au1000_set_ac97_recv_slots(au1000, AC97_SLOT_3 | AC97_SLOT_4);
375         snd_ac97_set_rate(au1000->ac97, AC97_PCM_LR_ADC_RATE, runtime->rate);
376         return 0;
377 }
378
379 static int
380 snd_au1000_trigger(struct snd_pcm_substream *substream, int cmd)
381 {
382         struct audio_stream *stream = substream->private_data;
383         int err = 0;
384
385         spin_lock(&stream->dma_lock);
386         switch (cmd) {
387         case SNDRV_PCM_TRIGGER_START:
388                 au1000_dma_start(stream);
389                 break;
390         case SNDRV_PCM_TRIGGER_STOP:
391                 au1000_dma_stop(stream);
392                 break;
393         default:
394                 err = -EINVAL;
395                 break;
396         }
397         spin_unlock(&stream->dma_lock);
398         return err;
399 }
400
401 static snd_pcm_uframes_t
402 snd_au1000_pointer(struct snd_pcm_substream *substream)
403 {
404         struct audio_stream *stream = substream->private_data;
405         struct snd_pcm_runtime *runtime = substream->runtime;
406         long location;
407
408         spin_lock(&stream->dma_lock);
409         location = get_dma_residue(stream->dma);
410         spin_unlock(&stream->dma_lock);
411         location = stream->buffer->relative_end - location;
412         if (location == -1)
413                 location = 0;
414         return bytes_to_frames(runtime,location);
415 }
416
417 static struct snd_pcm_ops snd_card_au1000_playback_ops = {
418         .open                   = snd_au1000_playback_open,
419         .close                  = snd_au1000_playback_close,
420         .ioctl                  = snd_pcm_lib_ioctl,
421         .hw_params              = snd_au1000_hw_params,
422         .hw_free                = snd_au1000_hw_free,
423         .prepare                = snd_au1000_playback_prepare,
424         .trigger                = snd_au1000_trigger,
425         .pointer                = snd_au1000_pointer,
426 };
427
428 static struct snd_pcm_ops snd_card_au1000_capture_ops = {
429         .open                   = snd_au1000_capture_open,
430         .close                  = snd_au1000_capture_close,
431         .ioctl                  = snd_pcm_lib_ioctl,
432         .hw_params              = snd_au1000_hw_params,
433         .hw_free                = snd_au1000_hw_free,
434         .prepare                = snd_au1000_capture_prepare,
435         .trigger                = snd_au1000_trigger,
436         .pointer                = snd_au1000_pointer,
437 };
438
439 static int __devinit
440 snd_au1000_pcm_new(struct snd_au1000 *au1000)
441 {
442         struct snd_pcm *pcm;
443         int err;
444         unsigned long flags;
445
446         if ((err = snd_pcm_new(au1000->card, "AU1000 AC97 PCM", 0, 1, 1, &pcm)) < 0)
447                 return err;
448
449         snd_pcm_lib_preallocate_pages_for_all(pcm, SNDRV_DMA_TYPE_CONTINUOUS,
450                 snd_dma_continuous_data(GFP_KERNEL), 128*1024, 128*1024);
451
452         snd_pcm_set_ops(pcm, SNDRV_PCM_STREAM_PLAYBACK,
453                 &snd_card_au1000_playback_ops);
454         snd_pcm_set_ops(pcm, SNDRV_PCM_STREAM_CAPTURE,
455                 &snd_card_au1000_capture_ops);
456
457         pcm->private_data = au1000;
458         pcm->info_flags = 0;
459         strcpy(pcm->name, "Au1000 AC97 PCM");
460
461         spin_lock_init(&au1000->stream[PLAYBACK]->dma_lock);
462         spin_lock_init(&au1000->stream[CAPTURE]->dma_lock);
463
464         flags = claim_dma_lock();
465         if ((au1000->stream[PLAYBACK]->dma = request_au1000_dma(DMA_ID_AC97C_TX,
466                         "AC97 TX", au1000_dma_interrupt, SA_INTERRUPT,
467                         au1000->stream[PLAYBACK])) < 0) {
468                 release_dma_lock(flags);
469                 return -EBUSY;
470         }
471         if ((au1000->stream[CAPTURE]->dma = request_au1000_dma(DMA_ID_AC97C_RX,
472                         "AC97 RX", au1000_dma_interrupt, SA_INTERRUPT,
473                         au1000->stream[CAPTURE])) < 0){
474                 release_dma_lock(flags);
475                 return -EBUSY;
476         }
477         /* enable DMA coherency in read/write DMA channels */
478         set_dma_mode(au1000->stream[PLAYBACK]->dma,
479                      get_dma_mode(au1000->stream[PLAYBACK]->dma) & ~DMA_NC);
480         set_dma_mode(au1000->stream[CAPTURE]->dma,
481                      get_dma_mode(au1000->stream[CAPTURE]->dma) & ~DMA_NC);
482         release_dma_lock(flags);
483         au1000->pcm = pcm;
484         return 0;
485 }
486
487
488 /*-------------------------- AC97 CODEC Control ------------------------------*/
489
490 static unsigned short
491 snd_au1000_ac97_read(struct snd_ac97 *ac97, unsigned short reg)
492 {
493         struct snd_au1000 *au1000 = ac97->private_data;
494         u32 volatile cmd;
495         u16 volatile data;
496         int             i;
497
498         spin_lock(&au1000->ac97_lock);
499 /* would rather use the interupt than this polling but it works and I can't
500 get the interupt driven case to work efficiently */
501         for (i = 0; i < 0x5000; i++)
502                 if (!(au1000->ac97_ioport->status & AC97C_CP))
503                         break;
504         if (i == 0x5000)
505                 printk(KERN_ERR "au1000 AC97: AC97 command read timeout\n");
506
507         cmd = (u32) reg & AC97C_INDEX_MASK;
508         cmd |= AC97C_READ;
509         au1000->ac97_ioport->cmd = cmd;
510
511         /* now wait for the data */
512         for (i = 0; i < 0x5000; i++)
513                 if (!(au1000->ac97_ioport->status & AC97C_CP))
514                         break;
515         if (i == 0x5000) {
516                 printk(KERN_ERR "au1000 AC97: AC97 command read timeout\n");
517                 return 0;
518         }
519
520         data = au1000->ac97_ioport->cmd & 0xffff;
521         spin_unlock(&au1000->ac97_lock);
522
523         return data;
524
525 }
526
527
528 static void
529 snd_au1000_ac97_write(struct snd_ac97 *ac97, unsigned short reg, unsigned short val)
530 {
531         struct snd_au1000 *au1000 = ac97->private_data;
532         u32 cmd;
533         int i;
534
535         spin_lock(&au1000->ac97_lock);
536 /* would rather use the interupt than this polling but it works and I can't
537 get the interupt driven case to work efficiently */
538         for (i = 0; i < 0x5000; i++)
539                 if (!(au1000->ac97_ioport->status & AC97C_CP))
540                         break;
541         if (i == 0x5000)
542                 printk(KERN_ERR "au1000 AC97: AC97 command write timeout\n");
543
544         cmd = (u32) reg & AC97C_INDEX_MASK;
545         cmd &= ~AC97C_READ;
546         cmd |= ((u32) val << AC97C_WD_BIT);
547         au1000->ac97_ioport->cmd = cmd;
548         spin_unlock(&au1000->ac97_lock);
549 }
550
551 static int __devinit
552 snd_au1000_ac97_new(struct snd_au1000 *au1000)
553 {
554         int err;
555         struct snd_ac97_bus *pbus;
556         struct snd_ac97_template ac97;
557         static struct snd_ac97_bus_ops ops = {
558                 .write = snd_au1000_ac97_write,
559                 .read = snd_au1000_ac97_read,
560         };
561
562         if ((au1000->ac97_res_port = request_region(AC97C_CONFIG,
563                         sizeof(struct au1000_ac97_reg), "Au1x00 AC97")) == NULL) {
564                 snd_printk(KERN_ERR "ALSA AC97: can't grap AC97 port\n");
565                 return -EBUSY;
566         }
567         au1000->ac97_ioport = (struct au1000_ac97_reg *) au1000->ac97_res_port->start;
568
569         spin_lock_init(&au1000->ac97_lock);
570
571         /* configure pins for AC'97
572         TODO: move to board_setup.c */
573         au_writel(au_readl(SYS_PINFUNC) & ~0x02, SYS_PINFUNC);
574
575         /* Initialise Au1000's AC'97 Control Block */
576         au1000->ac97_ioport->cntrl = AC97C_RS | AC97C_CE;
577         udelay(10);
578         au1000->ac97_ioport->cntrl = AC97C_CE;
579         udelay(10);
580
581         /* Initialise External CODEC -- cold reset */
582         au1000->ac97_ioport->config = AC97C_RESET;
583         udelay(10);
584         au1000->ac97_ioport->config = 0x0;
585         mdelay(5);
586
587         /* Initialise AC97 middle-layer */
588         if ((err = snd_ac97_bus(au1000->card, 0, &ops, au1000, &pbus)) < 0)
589                 return err;
590
591         memset(&ac97, 0, sizeof(ac97));
592         ac97.private_data = au1000;
593         if ((err = snd_ac97_mixer(pbus, &ac97, &au1000->ac97)) < 0)
594                 return err;
595
596         return 0;
597 }
598
599 /*------------------------------ Setup / Destroy ----------------------------*/
600
601 void
602 snd_au1000_free(struct snd_card *card)
603 {
604         struct snd_au1000 *au1000 = card->private_data;
605
606         if (au1000->ac97_res_port) {
607                 /* put internal AC97 block into reset */
608                 au1000->ac97_ioport->cntrl = AC97C_RS;
609                 au1000->ac97_ioport = NULL;
610                 release_and_free_resource(au1000->ac97_res_port);
611         }
612
613         if (au1000->stream[PLAYBACK]->dma >= 0)
614                 free_au1000_dma(au1000->stream[PLAYBACK]->dma);
615
616         if (au1000->stream[CAPTURE]->dma >= 0)
617                 free_au1000_dma(au1000->stream[CAPTURE]->dma);
618
619         kfree(au1000->stream[PLAYBACK]);
620         kfree(au1000->stream[CAPTURE]);
621 }
622
623
624 static struct snd_card *au1000_card;
625
626 static int __init
627 au1000_init(void)
628 {
629         int err;
630         struct snd_card *card;
631         struct snd_au1000 *au1000;
632
633         card = snd_card_new(-1, "AC97", THIS_MODULE, sizeof(struct snd_au1000));
634         if (card == NULL)
635                 return -ENOMEM;
636
637         card->private_free = snd_au1000_free;
638         au1000 = card->private_data;
639         /* so that snd_au1000_free will work as intended */
640         au1000->card = card;
641         au1000->stream[PLAYBACK]->dma = -1;
642         au1000->stream[CAPTURE]->dma = -1;
643         au1000->ac97_res_port = NULL;
644         au1000->stream[PLAYBACK] = kmalloc(sizeof(struct audio_stream), GFP_KERNEL);
645         au1000->stream[CAPTURE] = kmalloc(sizeof(struct audio_stream), GFP_KERNEL);
646         if (au1000->stream[PLAYBACK] == NULL ||
647             au1000->stream[CAPTURE] == NULL) {
648                 snd_card_free(card);
649                 return -ENOMEM;
650         }
651
652         if ((err = snd_au1000_ac97_new(au1000)) < 0 ) {
653                 snd_card_free(card);
654                 return err;
655         }
656
657         if ((err = snd_au1000_pcm_new(au1000)) < 0) {
658                 snd_card_free(card);
659                 return err;
660         }
661
662         strcpy(card->driver, "Au1000-AC97");
663         strcpy(card->shortname, "AMD Au1000-AC97");
664         sprintf(card->longname, "AMD Au1000--AC97 ALSA Driver");
665
666         if ((err = snd_card_register(card)) < 0) {
667                 snd_card_free(card);
668                 return err;
669         }
670
671         printk( KERN_INFO "ALSA AC97: Driver Initialized\n" );
672         au1000_card = card;
673         return 0;
674 }
675
676 static void __exit au1000_exit(void)
677 {
678         snd_card_free(au1000_card);
679 }
680
681 module_init(au1000_init);
682 module_exit(au1000_exit);
683