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1da177e4 LT |
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 | #if LINUX_VERSION_CODE > KERNEL_VERSION(2,6,8) | |
54 | MODULE_SUPPORTED_DEVICE("{{AMD,Au1000 AC'97}}"); | |
55 | #else | |
56 | MODULE_CLASSES("{sound}"); | |
57 | MODULE_DEVICES("{{AMD,Au1000 AC'97}}"); | |
58 | #endif | |
59 | ||
1da177e4 LT |
60 | #define PLAYBACK 0 |
61 | #define CAPTURE 1 | |
62 | #define AC97_SLOT_3 0x01 | |
63 | #define AC97_SLOT_4 0x02 | |
64 | #define AC97_SLOT_6 0x08 | |
65 | #define AC97_CMD_IRQ 31 | |
66 | #define READ 0 | |
67 | #define WRITE 1 | |
68 | #define READ_WAIT 2 | |
69 | #define RW_DONE 3 | |
70 | ||
71 | DECLARE_WAIT_QUEUE_HEAD(ac97_command_wq); | |
72 | ||
73 | typedef struct au1000_period au1000_period_t; | |
74 | struct au1000_period | |
75 | { | |
76 | u32 start; | |
77 | u32 relative_end; /*realtive to start of buffer*/ | |
78 | au1000_period_t * next; | |
79 | }; | |
80 | ||
81 | /*Au1000 AC97 Port Control Reisters*/ | |
82 | typedef struct au1000_ac97_reg au1000_ac97_reg_t; | |
83 | struct au1000_ac97_reg { | |
84 | u32 volatile config; | |
85 | u32 volatile status; | |
86 | u32 volatile data; | |
87 | u32 volatile cmd; | |
88 | u32 volatile cntrl; | |
89 | }; | |
90 | ||
91 | typedef struct audio_stream audio_stream_t; | |
92 | struct audio_stream { | |
93 | snd_pcm_substream_t * substream; | |
94 | int dma; | |
95 | spinlock_t dma_lock; | |
96 | au1000_period_t * buffer; | |
97 | unsigned long period_size; | |
98 | }; | |
99 | ||
100 | typedef struct snd_card_au1000 { | |
101 | snd_card_t *card; | |
102 | au1000_ac97_reg_t volatile *ac97_ioport; | |
103 | ||
104 | struct resource *ac97_res_port; | |
105 | spinlock_t ac97_lock; | |
106 | ac97_t *ac97; | |
107 | ||
108 | snd_pcm_t *pcm; | |
109 | audio_stream_t *stream[2]; /* playback & capture */ | |
110 | } au1000_t; | |
111 | ||
112 | static au1000_t *au1000 = NULL; | |
113 | ||
114 | /*--------------------------- Local Functions --------------------------------*/ | |
115 | static void | |
116 | au1000_set_ac97_xmit_slots(long xmit_slots) | |
117 | { | |
118 | u32 volatile ac97_config; | |
119 | ||
120 | spin_lock(&au1000->ac97_lock); | |
121 | ac97_config = au1000->ac97_ioport->config; | |
122 | ac97_config = ac97_config & ~AC97C_XMIT_SLOTS_MASK; | |
123 | ac97_config |= (xmit_slots << AC97C_XMIT_SLOTS_BIT); | |
124 | au1000->ac97_ioport->config = ac97_config; | |
125 | spin_unlock(&au1000->ac97_lock); | |
126 | } | |
127 | ||
128 | static void | |
129 | au1000_set_ac97_recv_slots(long recv_slots) | |
130 | { | |
131 | u32 volatile ac97_config; | |
132 | ||
133 | spin_lock(&au1000->ac97_lock); | |
134 | ac97_config = au1000->ac97_ioport->config; | |
135 | ac97_config = ac97_config & ~AC97C_RECV_SLOTS_MASK; | |
136 | ac97_config |= (recv_slots << AC97C_RECV_SLOTS_BIT); | |
137 | au1000->ac97_ioport->config = ac97_config; | |
138 | spin_unlock(&au1000->ac97_lock); | |
139 | } | |
140 | ||
141 | ||
142 | static void | |
143 | au1000_dma_stop(audio_stream_t *stream) | |
144 | { | |
145 | unsigned long flags; | |
146 | au1000_period_t * pointer; | |
147 | au1000_period_t * pointer_next; | |
148 | ||
149 | if (stream->buffer != NULL) { | |
150 | spin_lock_irqsave(&stream->dma_lock, flags); | |
151 | disable_dma(stream->dma); | |
152 | spin_unlock_irqrestore(&stream->dma_lock, flags); | |
153 | ||
154 | pointer = stream->buffer; | |
155 | pointer_next = stream->buffer->next; | |
156 | ||
157 | do { | |
158 | kfree(pointer); | |
159 | pointer = pointer_next; | |
160 | pointer_next = pointer->next; | |
161 | } while (pointer != stream->buffer); | |
162 | ||
163 | stream->buffer = NULL; | |
164 | } | |
165 | } | |
166 | ||
167 | static void | |
168 | au1000_dma_start(audio_stream_t *stream) | |
169 | { | |
170 | snd_pcm_substream_t *substream = stream->substream; | |
171 | snd_pcm_runtime_t *runtime = substream->runtime; | |
172 | ||
173 | unsigned long flags, dma_start; | |
174 | int i; | |
175 | au1000_period_t * pointer; | |
176 | ||
177 | if (stream->buffer == NULL) { | |
178 | dma_start = virt_to_phys(runtime->dma_area); | |
179 | ||
180 | stream->period_size = frames_to_bytes(runtime, | |
181 | runtime->period_size); | |
182 | stream->buffer = kmalloc(sizeof(au1000_period_t), GFP_KERNEL); | |
183 | pointer = stream->buffer; | |
184 | for (i = 0 ; i < runtime->periods ; i++) { | |
185 | pointer->start = (u32)(dma_start + | |
186 | (i * stream->period_size)); | |
187 | pointer->relative_end = (u32) | |
188 | (((i+1) * stream->period_size) - 0x1); | |
189 | if ( i < runtime->periods - 1) { | |
190 | pointer->next = kmalloc(sizeof(au1000_period_t) | |
191 | , GFP_KERNEL); | |
192 | pointer = pointer->next; | |
193 | } | |
194 | } | |
195 | pointer->next = stream->buffer; | |
196 | ||
197 | spin_lock_irqsave(&stream->dma_lock, flags); | |
198 | init_dma(stream->dma); | |
199 | if (get_dma_active_buffer(stream->dma) == 0) { | |
200 | clear_dma_done0(stream->dma); | |
201 | set_dma_addr0(stream->dma, stream->buffer->start); | |
202 | set_dma_count0(stream->dma, stream->period_size >> 1); | |
203 | set_dma_addr1(stream->dma, stream->buffer->next->start); | |
204 | set_dma_count1(stream->dma, stream->period_size >> 1); | |
205 | } else { | |
206 | clear_dma_done1(stream->dma); | |
207 | set_dma_addr1(stream->dma, stream->buffer->start); | |
208 | set_dma_count1(stream->dma, stream->period_size >> 1); | |
209 | set_dma_addr0(stream->dma, stream->buffer->next->start); | |
210 | set_dma_count0(stream->dma, stream->period_size >> 1); | |
211 | } | |
212 | enable_dma_buffers(stream->dma); | |
213 | start_dma(stream->dma); | |
214 | spin_unlock_irqrestore(&stream->dma_lock, flags); | |
215 | } | |
216 | } | |
217 | ||
218 | static irqreturn_t | |
219 | au1000_dma_interrupt(int irq, void *dev_id, struct pt_regs *regs) | |
220 | { | |
221 | audio_stream_t *stream = (audio_stream_t *) dev_id; | |
222 | snd_pcm_substream_t *substream = stream->substream; | |
223 | ||
224 | spin_lock(&stream->dma_lock); | |
225 | switch (get_dma_buffer_done(stream->dma)) { | |
226 | case DMA_D0: | |
227 | stream->buffer = stream->buffer->next; | |
228 | clear_dma_done0(stream->dma); | |
229 | set_dma_addr0(stream->dma, stream->buffer->next->start); | |
230 | set_dma_count0(stream->dma, stream->period_size >> 1); | |
231 | enable_dma_buffer0(stream->dma); | |
232 | break; | |
233 | case DMA_D1: | |
234 | stream->buffer = stream->buffer->next; | |
235 | clear_dma_done1(stream->dma); | |
236 | set_dma_addr1(stream->dma, stream->buffer->next->start); | |
237 | set_dma_count1(stream->dma, stream->period_size >> 1); | |
238 | enable_dma_buffer1(stream->dma); | |
239 | break; | |
240 | case (DMA_D0 | DMA_D1): | |
241 | spin_unlock(&stream->dma_lock); | |
242 | printk(KERN_ERR "DMA %d missed interrupt.\n",stream->dma); | |
243 | au1000_dma_stop(stream); | |
244 | au1000_dma_start(stream); | |
245 | spin_lock(&stream->dma_lock); | |
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 snd_pcm_hw_constraint_list_t hw_constraints_rates = { | |
259 | .count = sizeof(rates) / sizeof(rates[0]), | |
260 | .list = rates, | |
261 | .mask = 0, | |
262 | }; | |
263 | ||
264 | static snd_pcm_hardware_t snd_au1000 = | |
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(snd_pcm_substream_t * substream) | |
285 | { | |
286 | au1000->stream[PLAYBACK]->substream = substream; | |
287 | au1000->stream[PLAYBACK]->buffer = NULL; | |
288 | substream->private_data = au1000->stream[PLAYBACK]; | |
289 | substream->runtime->hw = snd_au1000; | |
290 | return (snd_pcm_hw_constraint_list(substream->runtime, 0, | |
291 | SNDRV_PCM_HW_PARAM_RATE, &hw_constraints_rates) < 0); | |
292 | } | |
293 | ||
294 | static int | |
295 | snd_au1000_capture_open(snd_pcm_substream_t * substream) | |
296 | { | |
297 | au1000->stream[CAPTURE]->substream = substream; | |
298 | au1000->stream[CAPTURE]->buffer = NULL; | |
299 | substream->private_data = au1000->stream[CAPTURE]; | |
300 | substream->runtime->hw = snd_au1000; | |
301 | return (snd_pcm_hw_constraint_list(substream->runtime, 0, | |
302 | SNDRV_PCM_HW_PARAM_RATE, &hw_constraints_rates) < 0); | |
303 | ||
304 | } | |
305 | ||
306 | static int | |
307 | snd_au1000_playback_close(snd_pcm_substream_t * substream) | |
308 | { | |
309 | au1000->stream[PLAYBACK]->substream = NULL; | |
310 | return 0; | |
311 | } | |
312 | ||
313 | static int | |
314 | snd_au1000_capture_close(snd_pcm_substream_t * substream) | |
315 | { | |
316 | au1000->stream[CAPTURE]->substream = NULL; | |
317 | return 0; | |
318 | } | |
319 | ||
320 | static int | |
321 | snd_au1000_hw_params(snd_pcm_substream_t * substream, | |
322 | snd_pcm_hw_params_t * hw_params) | |
323 | { | |
324 | return snd_pcm_lib_malloc_pages(substream, | |
325 | params_buffer_bytes(hw_params)); | |
326 | } | |
327 | ||
328 | static int | |
329 | snd_au1000_hw_free(snd_pcm_substream_t * substream) | |
330 | { | |
331 | return snd_pcm_lib_free_pages(substream); | |
332 | } | |
333 | ||
334 | static int | |
335 | snd_au1000_playback_prepare(snd_pcm_substream_t * substream) | |
336 | { | |
337 | snd_pcm_runtime_t *runtime = substream->runtime; | |
338 | ||
339 | if (runtime->channels == 1 ) | |
340 | au1000_set_ac97_xmit_slots(AC97_SLOT_4); | |
341 | else | |
342 | au1000_set_ac97_xmit_slots(AC97_SLOT_3 | AC97_SLOT_4); | |
343 | snd_ac97_set_rate(au1000->ac97, AC97_PCM_FRONT_DAC_RATE, runtime->rate); | |
344 | return 0; | |
345 | } | |
346 | ||
347 | static int | |
348 | snd_au1000_capture_prepare(snd_pcm_substream_t * substream) | |
349 | { | |
350 | snd_pcm_runtime_t *runtime = substream->runtime; | |
351 | ||
352 | if (runtime->channels == 1 ) | |
353 | au1000_set_ac97_recv_slots(AC97_SLOT_4); | |
354 | else | |
355 | au1000_set_ac97_recv_slots(AC97_SLOT_3 | AC97_SLOT_4); | |
356 | snd_ac97_set_rate(au1000->ac97, AC97_PCM_LR_ADC_RATE, runtime->rate); | |
357 | return 0; | |
358 | } | |
359 | ||
360 | static int | |
361 | snd_au1000_trigger(snd_pcm_substream_t * substream, int cmd) | |
362 | { | |
363 | audio_stream_t *stream = substream->private_data; | |
364 | int err = 0; | |
365 | ||
366 | switch (cmd) { | |
367 | case SNDRV_PCM_TRIGGER_START: | |
368 | au1000_dma_start(stream); | |
369 | break; | |
370 | case SNDRV_PCM_TRIGGER_STOP: | |
371 | au1000_dma_stop(stream); | |
372 | break; | |
373 | default: | |
374 | err = -EINVAL; | |
375 | break; | |
376 | } | |
377 | return err; | |
378 | } | |
379 | ||
380 | static snd_pcm_uframes_t | |
381 | snd_au1000_pointer(snd_pcm_substream_t * substream) | |
382 | { | |
383 | audio_stream_t *stream = substream->private_data; | |
384 | snd_pcm_runtime_t *runtime = substream->runtime; | |
385 | unsigned long flags; | |
386 | long location; | |
387 | ||
388 | spin_lock_irqsave(&stream->dma_lock, flags); | |
389 | location = get_dma_residue(stream->dma); | |
390 | spin_unlock_irqrestore(&stream->dma_lock, flags); | |
391 | location = stream->buffer->relative_end - location; | |
392 | if (location == -1) | |
393 | location = 0; | |
394 | return bytes_to_frames(runtime,location); | |
395 | } | |
396 | ||
397 | static snd_pcm_ops_t snd_card_au1000_playback_ops = { | |
398 | .open = snd_au1000_playback_open, | |
399 | .close = snd_au1000_playback_close, | |
400 | .ioctl = snd_pcm_lib_ioctl, | |
401 | .hw_params = snd_au1000_hw_params, | |
402 | .hw_free = snd_au1000_hw_free, | |
403 | .prepare = snd_au1000_playback_prepare, | |
404 | .trigger = snd_au1000_trigger, | |
405 | .pointer = snd_au1000_pointer, | |
406 | }; | |
407 | ||
408 | static snd_pcm_ops_t snd_card_au1000_capture_ops = { | |
409 | .open = snd_au1000_capture_open, | |
410 | .close = snd_au1000_capture_close, | |
411 | .ioctl = snd_pcm_lib_ioctl, | |
412 | .hw_params = snd_au1000_hw_params, | |
413 | .hw_free = snd_au1000_hw_free, | |
414 | .prepare = snd_au1000_capture_prepare, | |
415 | .trigger = snd_au1000_trigger, | |
416 | .pointer = snd_au1000_pointer, | |
417 | }; | |
418 | ||
419 | static int __devinit | |
420 | snd_au1000_pcm_new(void) | |
421 | { | |
422 | snd_pcm_t *pcm; | |
423 | int err; | |
424 | unsigned long flags; | |
425 | ||
426 | if ((err = snd_pcm_new(au1000->card, "AU1000 AC97 PCM", 0, 1, 1, &pcm)) < 0) | |
427 | return err; | |
428 | ||
429 | snd_pcm_lib_preallocate_pages_for_all(pcm, SNDRV_DMA_TYPE_CONTINUOUS, | |
430 | snd_dma_continuous_data(GFP_KERNEL), 128*1024, 128*1024); | |
431 | ||
432 | snd_pcm_set_ops(pcm, SNDRV_PCM_STREAM_PLAYBACK, | |
433 | &snd_card_au1000_playback_ops); | |
434 | snd_pcm_set_ops(pcm, SNDRV_PCM_STREAM_CAPTURE, | |
435 | &snd_card_au1000_capture_ops); | |
436 | ||
437 | pcm->private_data = au1000; | |
438 | pcm->info_flags = 0; | |
439 | strcpy(pcm->name, "Au1000 AC97 PCM"); | |
440 | ||
441 | flags = claim_dma_lock(); | |
442 | if ((au1000->stream[PLAYBACK]->dma = request_au1000_dma(DMA_ID_AC97C_TX, | |
443 | "AC97 TX", au1000_dma_interrupt, SA_INTERRUPT, | |
444 | au1000->stream[PLAYBACK])) < 0) { | |
445 | release_dma_lock(flags); | |
446 | return -EBUSY; | |
447 | } | |
448 | if ((au1000->stream[CAPTURE]->dma = request_au1000_dma(DMA_ID_AC97C_RX, | |
449 | "AC97 RX", au1000_dma_interrupt, SA_INTERRUPT, | |
450 | au1000->stream[CAPTURE])) < 0){ | |
451 | release_dma_lock(flags); | |
452 | return -EBUSY; | |
453 | } | |
454 | /* enable DMA coherency in read/write DMA channels */ | |
455 | set_dma_mode(au1000->stream[PLAYBACK]->dma, | |
456 | get_dma_mode(au1000->stream[PLAYBACK]->dma) & ~DMA_NC); | |
457 | set_dma_mode(au1000->stream[CAPTURE]->dma, | |
458 | get_dma_mode(au1000->stream[CAPTURE]->dma) & ~DMA_NC); | |
459 | release_dma_lock(flags); | |
460 | spin_lock_init(&au1000->stream[PLAYBACK]->dma_lock); | |
461 | spin_lock_init(&au1000->stream[CAPTURE]->dma_lock); | |
462 | au1000->pcm = pcm; | |
463 | return 0; | |
464 | } | |
465 | ||
466 | ||
467 | /*-------------------------- AC97 CODEC Control ------------------------------*/ | |
468 | ||
469 | static unsigned short | |
470 | snd_au1000_ac97_read(ac97_t *ac97, unsigned short reg) | |
471 | { | |
472 | u32 volatile cmd; | |
473 | u16 volatile data; | |
474 | int i; | |
708f9971 | 475 | spin_lock(&au1000->ac97_lock); |
1da177e4 LT |
476 | /* would rather use the interupt than this polling but it works and I can't |
477 | get the interupt driven case to work efficiently */ | |
478 | for (i = 0; i < 0x5000; i++) | |
479 | if (!(au1000->ac97_ioport->status & AC97C_CP)) | |
480 | break; | |
481 | if (i == 0x5000) | |
482 | printk(KERN_ERR "au1000 AC97: AC97 command read timeout\n"); | |
483 | ||
484 | cmd = (u32) reg & AC97C_INDEX_MASK; | |
485 | cmd |= AC97C_READ; | |
486 | au1000->ac97_ioport->cmd = cmd; | |
487 | ||
488 | /* now wait for the data */ | |
489 | for (i = 0; i < 0x5000; i++) | |
490 | if (!(au1000->ac97_ioport->status & AC97C_CP)) | |
491 | break; | |
492 | if (i == 0x5000) { | |
493 | printk(KERN_ERR "au1000 AC97: AC97 command read timeout\n"); | |
494 | return 0; | |
495 | } | |
496 | ||
497 | data = au1000->ac97_ioport->cmd & 0xffff; | |
708f9971 | 498 | spin_unlock(&au1000->ac97_lock); |
1da177e4 LT |
499 | |
500 | return data; | |
501 | ||
502 | } | |
503 | ||
504 | ||
505 | static void | |
506 | snd_au1000_ac97_write(ac97_t *ac97, unsigned short reg, unsigned short val) | |
507 | { | |
508 | u32 cmd; | |
509 | int i; | |
708f9971 | 510 | spin_lock(&au1000->ac97_lock); |
1da177e4 LT |
511 | /* would rather use the interupt than this polling but it works and I can't |
512 | get the interupt driven case to work efficiently */ | |
513 | for (i = 0; i < 0x5000; i++) | |
514 | if (!(au1000->ac97_ioport->status & AC97C_CP)) | |
515 | break; | |
516 | if (i == 0x5000) | |
517 | printk(KERN_ERR "au1000 AC97: AC97 command write timeout\n"); | |
518 | ||
519 | cmd = (u32) reg & AC97C_INDEX_MASK; | |
520 | cmd &= ~AC97C_READ; | |
521 | cmd |= ((u32) val << AC97C_WD_BIT); | |
522 | au1000->ac97_ioport->cmd = cmd; | |
708f9971 | 523 | spin_unlock(&au1000->ac97_lock); |
1da177e4 LT |
524 | } |
525 | static void | |
526 | snd_au1000_ac97_free(ac97_t *ac97) | |
527 | { | |
528 | au1000->ac97 = NULL; | |
529 | } | |
530 | ||
531 | static int __devinit | |
532 | snd_au1000_ac97_new(void) | |
533 | { | |
534 | int err; | |
535 | ||
536 | #if LINUX_VERSION_CODE > KERNEL_VERSION(2,6,8) | |
537 | ac97_bus_t *pbus; | |
538 | ac97_template_t ac97; | |
539 | static ac97_bus_ops_t ops = { | |
540 | .write = snd_au1000_ac97_write, | |
541 | .read = snd_au1000_ac97_read, | |
542 | }; | |
543 | #else | |
544 | ac97_bus_t bus, *pbus; | |
545 | ac97_t ac97; | |
546 | #endif | |
547 | ||
548 | if ((au1000->ac97_res_port = request_region(AC97C_CONFIG, | |
549 | sizeof(au1000_ac97_reg_t), "Au1x00 AC97")) == NULL) { | |
550 | snd_printk(KERN_ERR "ALSA AC97: can't grap AC97 port\n"); | |
551 | return -EBUSY; | |
552 | } | |
553 | au1000->ac97_ioport = (au1000_ac97_reg_t *) au1000->ac97_res_port->start; | |
554 | ||
555 | spin_lock_init(&au1000->ac97_lock); | |
556 | ||
557 | spin_lock(&au1000->ac97_lock); | |
558 | ||
559 | /* configure pins for AC'97 | |
560 | TODO: move to board_setup.c */ | |
561 | au_writel(au_readl(SYS_PINFUNC) & ~0x02, SYS_PINFUNC); | |
562 | ||
563 | /* Initialise Au1000's AC'97 Control Block */ | |
564 | au1000->ac97_ioport->cntrl = AC97C_RS | AC97C_CE; | |
565 | udelay(10); | |
566 | au1000->ac97_ioport->cntrl = AC97C_CE; | |
567 | udelay(10); | |
568 | ||
569 | /* Initialise External CODEC -- cold reset */ | |
570 | au1000->ac97_ioport->config = AC97C_RESET; | |
571 | udelay(10); | |
572 | au1000->ac97_ioport->config = 0x0; | |
573 | mdelay(5); | |
574 | ||
575 | spin_unlock(&au1000->ac97_lock); | |
576 | ||
577 | /* Initialise AC97 middle-layer */ | |
578 | #if LINUX_VERSION_CODE > KERNEL_VERSION(2,6,8) | |
579 | if ((err = snd_ac97_bus(au1000->card, 0, &ops, au1000, &pbus)) < 0) | |
580 | return err; | |
581 | #else | |
582 | memset(&bus, 0, sizeof(bus)); | |
583 | bus.write = snd_au1000_ac97_write; | |
584 | bus.read = snd_au1000_ac97_read; | |
585 | if ((err = snd_ac97_bus(au1000->card, &bus, &pbus)) < 0) | |
586 | return err; | |
587 | #endif | |
588 | memset(&ac97, 0, sizeof(ac97)); | |
589 | ac97.private_data = au1000; | |
590 | ac97.private_free = snd_au1000_ac97_free; | |
591 | if ((err = snd_ac97_mixer(pbus, &ac97, &au1000->ac97)) < 0) | |
592 | return err; | |
593 | return 0; | |
594 | ||
595 | } | |
596 | ||
597 | /*------------------------------ Setup / Destroy ----------------------------*/ | |
598 | ||
599 | void | |
600 | snd_au1000_free(snd_card_t *card) | |
601 | { | |
602 | ||
603 | if (au1000->ac97_res_port) { | |
604 | /* put internal AC97 block into reset */ | |
605 | au1000->ac97_ioport->cntrl = AC97C_RS; | |
606 | au1000->ac97_ioport = NULL; | |
b1d5776d | 607 | release_and_free_resource(au1000->ac97_res_port); |
1da177e4 LT |
608 | } |
609 | ||
610 | if (au1000->stream[PLAYBACK]->dma >= 0) | |
611 | free_au1000_dma(au1000->stream[PLAYBACK]->dma); | |
612 | ||
613 | if (au1000->stream[CAPTURE]->dma >= 0) | |
614 | free_au1000_dma(au1000->stream[CAPTURE]->dma); | |
615 | ||
616 | kfree(au1000->stream[PLAYBACK]); | |
617 | au1000->stream[PLAYBACK] = NULL; | |
618 | kfree(au1000->stream[CAPTURE]); | |
619 | au1000->stream[CAPTURE] = NULL; | |
620 | kfree(au1000); | |
621 | au1000 = NULL; | |
622 | ||
623 | } | |
624 | ||
625 | static int __init | |
626 | au1000_init(void) | |
627 | { | |
628 | int err; | |
629 | ||
630 | au1000 = kmalloc(sizeof(au1000_t), GFP_KERNEL); | |
631 | if (au1000 == NULL) | |
632 | return -ENOMEM; | |
633 | au1000->stream[PLAYBACK] = kmalloc(sizeof(audio_stream_t), GFP_KERNEL); | |
634 | if (au1000->stream[PLAYBACK] == NULL) | |
635 | return -ENOMEM; | |
636 | au1000->stream[CAPTURE] = kmalloc(sizeof(audio_stream_t), GFP_KERNEL); | |
637 | if (au1000->stream[CAPTURE] == NULL) | |
638 | return -ENOMEM; | |
639 | /* so that snd_au1000_free will work as intended */ | |
640 | au1000->stream[PLAYBACK]->dma = -1; | |
641 | au1000->stream[CAPTURE]->dma = -1; | |
642 | au1000->ac97_res_port = NULL; | |
643 | ||
644 | au1000->card = snd_card_new(-1, "AC97", THIS_MODULE, sizeof(au1000_t)); | |
645 | if (au1000->card == NULL) { | |
646 | snd_au1000_free(au1000->card); | |
647 | return -ENOMEM; | |
648 | } | |
649 | ||
650 | au1000->card->private_data = (au1000_t *)au1000; | |
651 | au1000->card->private_free = snd_au1000_free; | |
652 | ||
653 | if ((err = snd_au1000_ac97_new()) < 0 ) { | |
654 | snd_card_free(au1000->card); | |
655 | return err; | |
656 | } | |
657 | ||
658 | if ((err = snd_au1000_pcm_new()) < 0) { | |
659 | snd_card_free(au1000->card); | |
660 | return err; | |
661 | } | |
662 | ||
663 | strcpy(au1000->card->driver, "AMD-Au1000-AC97"); | |
664 | strcpy(au1000->card->shortname, "Au1000-AC97"); | |
665 | sprintf(au1000->card->longname, "AMD Au1000--AC97 ALSA Driver"); | |
666 | ||
16dab54b TI |
667 | if ((err = snd_card_set_generic_dev(au1000->card)) < 0) { |
668 | snd_card_free(au1000->card); | |
669 | return err; | |
670 | } | |
671 | ||
1da177e4 LT |
672 | if ((err = snd_card_register(au1000->card)) < 0) { |
673 | snd_card_free(au1000->card); | |
674 | return err; | |
675 | } | |
676 | ||
677 | printk( KERN_INFO "ALSA AC97: Driver Initialized\n" ); | |
678 | return 0; | |
679 | } | |
680 | ||
681 | static void __exit au1000_exit(void) | |
682 | { | |
683 | snd_card_free(au1000->card); | |
684 | } | |
685 | ||
686 | module_init(au1000_init); | |
687 | module_exit(au1000_exit); | |
688 |