?  search:
summary | log | graphiclog1 | graphiclog2 | commit | commitdiff | tree | refs | edit | fork
blame | history | raw | HEAD
allow coexistance of N build and AC build.
[tomato.git] / release / src-rt-6.x / linux / linux-2.6 / sound / mips / au1x00.c
blob8a61a119186135984c42b7299a9c692cf8853f20
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
51 MODULE_AUTHOR("Charles Eidsness <charles@cooper-street.com>");
52 MODULE_DESCRIPTION("Au1000 AC'97 ALSA Driver");
53 MODULE_LICENSE("GPL");
54 MODULE_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
67 struct 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*/
75 struct 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
83 struct 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
92 struct 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 --------------------------------*/
105 static void
106 au1000_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
118 static void
119 au1000_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
132 static void
133 au1000_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
151 static int
152 au1000_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
192 static void
193 au1000_dma_stop(struct audio_stream *stream)
194 {
195 snd_assert(stream->buffer, return);
196 disable_dma(stream->dma);
197 }
198
199 static void
200 au1000_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
222 static irqreturn_t
223 au1000_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
259 static unsigned int rates[] = {8000, 11025, 16000, 22050};
260 static struct snd_pcm_hw_constraint_list hw_constraints_rates = {
261 .count = ARRAY_SIZE(rates),
262 .list = rates,
263 .mask = 0,
264 };
265
266 static 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
285 static int
286 snd_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
298 static int
299 snd_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
311 static int
312 snd_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
320 static int
321 snd_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
329 static int
330 snd_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
345 static int
346 snd_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
353 static int
354 snd_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
367 static int
368 snd_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
381 static int
382 snd_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
403 static snd_pcm_uframes_t
404 snd_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
419 static 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
430 static 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
441 static int __devinit
442 snd_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
492 static unsigned short
493 snd_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
502 get 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
530 static void
531 snd_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
539 get 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
553 static int __devinit
554 snd_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
604 void
605 snd_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
630 static struct snd_card *au1000_card;
631
632 static int __init
633 au1000_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
686 static void __exit au1000_exit(void)
687 {
688 snd_card_free(au1000_card);
689 }
690
691 module_init(au1000_init);
692 module_exit(au1000_exit);
693
Tomato firmware and modifications.