ALSA: hda - update documentation for no-primary-hp fixup
[linux-3.10.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 <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>
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         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),
271         .formats                = SNDRV_PCM_FMTBIT_S16_LE,
272         .rates                  = (SNDRV_PCM_RATE_8000 | SNDRV_PCM_RATE_11025 |
273                                 SNDRV_PCM_RATE_16000 | SNDRV_PCM_RATE_22050),
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);
364         snd_ac97_set_rate(au1000->ac97, AC97_PCM_FRONT_DAC_RATE, runtime->rate);
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) {
390         case SNDRV_PCM_TRIGGER_START:
391                 au1000_dma_start(stream);
392                 break;
393         case SNDRV_PCM_TRIGGER_STOP:
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
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
452         snd_pcm_lib_preallocate_pages_for_all(pcm, SNDRV_DMA_TYPE_CONTINUOUS,
453                 snd_dma_continuous_data(GFP_KERNEL), 128*1024, 128*1024);
454
455         snd_pcm_set_ops(pcm, SNDRV_PCM_STREAM_PLAYBACK,
456                 &snd_card_au1000_playback_ops);
457         snd_pcm_set_ops(pcm, SNDRV_PCM_STREAM_CAPTURE,
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
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
566         if ((au1000->ac97_res_port = request_mem_region(CPHYSADDR(AC97C_CONFIG),
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
607 snd_au1000_free(struct snd_card *card)
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;
615                 release_and_free_resource(au1000->ac97_res_port);
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
646         card->private_free = snd_au1000_free;
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