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block: fix module reference leak on put_disk() call for cgroups throttle
[linux/fpc-iii.git] / sound / pci / hda / hda_controller.c
blob9c6e10fb479f4278fd710eb5af212e798de40b7e
1 /*
2 *
3 * Implementation of primary alsa driver code base for Intel HD Audio.
4 *
5 * Copyright(c) 2004 Intel Corporation. All rights reserved.
6 *
7 * Copyright (c) 2004 Takashi Iwai <tiwai@suse.de>
8 * PeiSen Hou <pshou@realtek.com.tw>
9 *
10 * This program is free software; you can redistribute it and/or modify it
11 * under the terms of the GNU General Public License as published by the Free
12 * Software Foundation; either version 2 of the License, or (at your option)
13 * any later version.
14 *
15 * This program is distributed in the hope that it will be useful, but WITHOUT
16 * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
17 * FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License for
18 * more details.
19 *
20 *
21 */
22
23 #include <linux/clocksource.h>
24 #include <linux/delay.h>
25 #include <linux/interrupt.h>
26 #include <linux/kernel.h>
27 #include <linux/module.h>
28 #include <linux/pm_runtime.h>
29 #include <linux/slab.h>
30 #include <sound/core.h>
31 #include <sound/initval.h>
32 #include "hda_controller.h"
33
34 #define CREATE_TRACE_POINTS
35 #include "hda_controller_trace.h"
36
37 /* DSP lock helpers */
38 #define dsp_lock(dev) snd_hdac_dsp_lock(azx_stream(dev))
39 #define dsp_unlock(dev) snd_hdac_dsp_unlock(azx_stream(dev))
40 #define dsp_is_locked(dev) snd_hdac_stream_is_locked(azx_stream(dev))
41
42 /* assign a stream for the PCM */
43 static inline struct azx_dev *
44 azx_assign_device(struct azx *chip, struct snd_pcm_substream *substream)
45 {
46 struct hdac_stream *s;
47
48 s = snd_hdac_stream_assign(azx_bus(chip), substream);
49 if (!s)
50 return NULL;
51 return stream_to_azx_dev(s);
52 }
53
54 /* release the assigned stream */
55 static inline void azx_release_device(struct azx_dev *azx_dev)
56 {
57 snd_hdac_stream_release(azx_stream(azx_dev));
58 }
59
60 static inline struct hda_pcm_stream *
61 to_hda_pcm_stream(struct snd_pcm_substream *substream)
62 {
63 struct azx_pcm *apcm = snd_pcm_substream_chip(substream);
64 return &apcm->info->stream[substream->stream];
65 }
66
67 static u64 azx_adjust_codec_delay(struct snd_pcm_substream *substream,
68 u64 nsec)
69 {
70 struct azx_pcm *apcm = snd_pcm_substream_chip(substream);
71 struct hda_pcm_stream *hinfo = to_hda_pcm_stream(substream);
72 u64 codec_frames, codec_nsecs;
73
74 if (!hinfo->ops.get_delay)
75 return nsec;
76
77 codec_frames = hinfo->ops.get_delay(hinfo, apcm->codec, substream);
78 codec_nsecs = div_u64(codec_frames * 1000000000LL,
79 substream->runtime->rate);
80
81 if (substream->stream == SNDRV_PCM_STREAM_CAPTURE)
82 return nsec + codec_nsecs;
83
84 return (nsec > codec_nsecs) ? nsec - codec_nsecs : 0;
85 }
86
87 /*
88 * PCM ops
89 */
90
91 static int azx_pcm_close(struct snd_pcm_substream *substream)
92 {
93 struct azx_pcm *apcm = snd_pcm_substream_chip(substream);
94 struct hda_pcm_stream *hinfo = to_hda_pcm_stream(substream);
95 struct azx *chip = apcm->chip;
96 struct azx_dev *azx_dev = get_azx_dev(substream);
97
98 trace_azx_pcm_close(chip, azx_dev);
99 mutex_lock(&chip->open_mutex);
100 azx_release_device(azx_dev);
101 if (hinfo->ops.close)
102 hinfo->ops.close(hinfo, apcm->codec, substream);
103 snd_hda_power_down(apcm->codec);
104 mutex_unlock(&chip->open_mutex);
105 snd_hda_codec_pcm_put(apcm->info);
106 return 0;
107 }
108
109 static int azx_pcm_hw_params(struct snd_pcm_substream *substream,
110 struct snd_pcm_hw_params *hw_params)
111 {
112 struct azx_pcm *apcm = snd_pcm_substream_chip(substream);
113 struct azx *chip = apcm->chip;
114 struct azx_dev *azx_dev = get_azx_dev(substream);
115 int ret;
116
117 trace_azx_pcm_hw_params(chip, azx_dev);
118 dsp_lock(azx_dev);
119 if (dsp_is_locked(azx_dev)) {
120 ret = -EBUSY;
121 goto unlock;
122 }
123
124 azx_dev->core.bufsize = 0;
125 azx_dev->core.period_bytes = 0;
126 azx_dev->core.format_val = 0;
127 ret = chip->ops->substream_alloc_pages(chip, substream,
128 params_buffer_bytes(hw_params));
129 unlock:
130 dsp_unlock(azx_dev);
131 return ret;
132 }
133
134 static int azx_pcm_hw_free(struct snd_pcm_substream *substream)
135 {
136 struct azx_pcm *apcm = snd_pcm_substream_chip(substream);
137 struct azx_dev *azx_dev = get_azx_dev(substream);
138 struct azx *chip = apcm->chip;
139 struct hda_pcm_stream *hinfo = to_hda_pcm_stream(substream);
140 int err;
141
142 /* reset BDL address */
143 dsp_lock(azx_dev);
144 if (!dsp_is_locked(azx_dev))
145 snd_hdac_stream_cleanup(azx_stream(azx_dev));
146
147 snd_hda_codec_cleanup(apcm->codec, hinfo, substream);
148
149 err = chip->ops->substream_free_pages(chip, substream);
150 azx_stream(azx_dev)->prepared = 0;
151 dsp_unlock(azx_dev);
152 return err;
153 }
154
155 static int azx_pcm_prepare(struct snd_pcm_substream *substream)
156 {
157 struct azx_pcm *apcm = snd_pcm_substream_chip(substream);
158 struct azx *chip = apcm->chip;
159 struct azx_dev *azx_dev = get_azx_dev(substream);
160 struct hda_pcm_stream *hinfo = to_hda_pcm_stream(substream);
161 struct snd_pcm_runtime *runtime = substream->runtime;
162 unsigned int format_val, stream_tag;
163 int err;
164 struct hda_spdif_out *spdif =
165 snd_hda_spdif_out_of_nid(apcm->codec, hinfo->nid);
166 unsigned short ctls = spdif ? spdif->ctls : 0;
167
168 trace_azx_pcm_prepare(chip, azx_dev);
169 dsp_lock(azx_dev);
170 if (dsp_is_locked(azx_dev)) {
171 err = -EBUSY;
172 goto unlock;
173 }
174
175 snd_hdac_stream_reset(azx_stream(azx_dev));
176 format_val = snd_hdac_calc_stream_format(runtime->rate,
177 runtime->channels,
178 runtime->format,
179 hinfo->maxbps,
180 ctls);
181 if (!format_val) {
182 dev_err(chip->card->dev,
183 "invalid format_val, rate=%d, ch=%d, format=%d\n",
184 runtime->rate, runtime->channels, runtime->format);
185 err = -EINVAL;
186 goto unlock;
187 }
188
189 err = snd_hdac_stream_set_params(azx_stream(azx_dev), format_val);
190 if (err < 0)
191 goto unlock;
192
193 snd_hdac_stream_setup(azx_stream(azx_dev));
194
195 stream_tag = azx_dev->core.stream_tag;
196 /* CA-IBG chips need the playback stream starting from 1 */
197 if ((chip->driver_caps & AZX_DCAPS_CTX_WORKAROUND) &&
198 stream_tag > chip->capture_streams)
199 stream_tag -= chip->capture_streams;
200 err = snd_hda_codec_prepare(apcm->codec, hinfo, stream_tag,
201 azx_dev->core.format_val, substream);
202
203 unlock:
204 if (!err)
205 azx_stream(azx_dev)->prepared = 1;
206 dsp_unlock(azx_dev);
207 return err;
208 }
209
210 static int azx_pcm_trigger(struct snd_pcm_substream *substream, int cmd)
211 {
212 struct azx_pcm *apcm = snd_pcm_substream_chip(substream);
213 struct azx *chip = apcm->chip;
214 struct hdac_bus *bus = azx_bus(chip);
215 struct azx_dev *azx_dev;
216 struct snd_pcm_substream *s;
217 struct hdac_stream *hstr;
218 bool start;
219 int sbits = 0;
220 int sync_reg;
221
222 azx_dev = get_azx_dev(substream);
223 trace_azx_pcm_trigger(chip, azx_dev, cmd);
224
225 hstr = azx_stream(azx_dev);
226 if (chip->driver_caps & AZX_DCAPS_OLD_SSYNC)
227 sync_reg = AZX_REG_OLD_SSYNC;
228 else
229 sync_reg = AZX_REG_SSYNC;
230
231 if (dsp_is_locked(azx_dev) || !hstr->prepared)
232 return -EPIPE;
233
234 switch (cmd) {
235 case SNDRV_PCM_TRIGGER_START:
236 case SNDRV_PCM_TRIGGER_PAUSE_RELEASE:
237 case SNDRV_PCM_TRIGGER_RESUME:
238 start = true;
239 break;
240 case SNDRV_PCM_TRIGGER_PAUSE_PUSH:
241 case SNDRV_PCM_TRIGGER_SUSPEND:
242 case SNDRV_PCM_TRIGGER_STOP:
243 start = false;
244 break;
245 default:
246 return -EINVAL;
247 }
248
249 snd_pcm_group_for_each_entry(s, substream) {
250 if (s->pcm->card != substream->pcm->card)
251 continue;
252 azx_dev = get_azx_dev(s);
253 sbits |= 1 << azx_dev->core.index;
254 snd_pcm_trigger_done(s, substream);
255 }
256
257 spin_lock(&bus->reg_lock);
258
259 /* first, set SYNC bits of corresponding streams */
260 snd_hdac_stream_sync_trigger(hstr, true, sbits, sync_reg);
261
262 snd_pcm_group_for_each_entry(s, substream) {
263 if (s->pcm->card != substream->pcm->card)
264 continue;
265 azx_dev = get_azx_dev(s);
266 if (start) {
267 azx_dev->insufficient = 1;
268 snd_hdac_stream_start(azx_stream(azx_dev), true);
269 } else {
270 snd_hdac_stream_stop(azx_stream(azx_dev));
271 }
272 }
273 spin_unlock(&bus->reg_lock);
274
275 snd_hdac_stream_sync(hstr, start, sbits);
276
277 spin_lock(&bus->reg_lock);
278 /* reset SYNC bits */
279 snd_hdac_stream_sync_trigger(hstr, false, sbits, sync_reg);
280 if (start)
281 snd_hdac_stream_timecounter_init(hstr, sbits);
282 spin_unlock(&bus->reg_lock);
283 return 0;
284 }
285
286 unsigned int azx_get_pos_lpib(struct azx *chip, struct azx_dev *azx_dev)
287 {
288 return snd_hdac_stream_get_pos_lpib(azx_stream(azx_dev));
289 }
290 EXPORT_SYMBOL_GPL(azx_get_pos_lpib);
291
292 unsigned int azx_get_pos_posbuf(struct azx *chip, struct azx_dev *azx_dev)
293 {
294 return snd_hdac_stream_get_pos_posbuf(azx_stream(azx_dev));
295 }
296 EXPORT_SYMBOL_GPL(azx_get_pos_posbuf);
297
298 unsigned int azx_get_position(struct azx *chip,
299 struct azx_dev *azx_dev)
300 {
301 struct snd_pcm_substream *substream = azx_dev->core.substream;
302 unsigned int pos;
303 int stream = substream->stream;
304 int delay = 0;
305
306 if (chip->get_position[stream])
307 pos = chip->get_position[stream](chip, azx_dev);
308 else /* use the position buffer as default */
309 pos = azx_get_pos_posbuf(chip, azx_dev);
310
311 if (pos >= azx_dev->core.bufsize)
312 pos = 0;
313
314 if (substream->runtime) {
315 struct azx_pcm *apcm = snd_pcm_substream_chip(substream);
316 struct hda_pcm_stream *hinfo = to_hda_pcm_stream(substream);
317
318 if (chip->get_delay[stream])
319 delay += chip->get_delay[stream](chip, azx_dev, pos);
320 if (hinfo->ops.get_delay)
321 delay += hinfo->ops.get_delay(hinfo, apcm->codec,
322 substream);
323 substream->runtime->delay = delay;
324 }
325
326 trace_azx_get_position(chip, azx_dev, pos, delay);
327 return pos;
328 }
329 EXPORT_SYMBOL_GPL(azx_get_position);
330
331 static snd_pcm_uframes_t azx_pcm_pointer(struct snd_pcm_substream *substream)
332 {
333 struct azx_pcm *apcm = snd_pcm_substream_chip(substream);
334 struct azx *chip = apcm->chip;
335 struct azx_dev *azx_dev = get_azx_dev(substream);
336 return bytes_to_frames(substream->runtime,
337 azx_get_position(chip, azx_dev));
338 }
339
340 static int azx_get_time_info(struct snd_pcm_substream *substream,
341 struct timespec *system_ts, struct timespec *audio_ts,
342 struct snd_pcm_audio_tstamp_config *audio_tstamp_config,
343 struct snd_pcm_audio_tstamp_report *audio_tstamp_report)
344 {
345 struct azx_dev *azx_dev = get_azx_dev(substream);
346 u64 nsec;
347
348 if ((substream->runtime->hw.info & SNDRV_PCM_INFO_HAS_LINK_ATIME) &&
349 (audio_tstamp_config->type_requested == SNDRV_PCM_AUDIO_TSTAMP_TYPE_LINK)) {
350
351 snd_pcm_gettime(substream->runtime, system_ts);
352
353 nsec = timecounter_read(&azx_dev->core.tc);
354 nsec = div_u64(nsec, 3); /* can be optimized */
355 if (audio_tstamp_config->report_delay)
356 nsec = azx_adjust_codec_delay(substream, nsec);
357
358 *audio_ts = ns_to_timespec(nsec);
359
360 audio_tstamp_report->actual_type = SNDRV_PCM_AUDIO_TSTAMP_TYPE_LINK;
361 audio_tstamp_report->accuracy_report = 1; /* rest of structure is valid */
362 audio_tstamp_report->accuracy = 42; /* 24 MHz WallClock == 42ns resolution */
363
364 } else
365 audio_tstamp_report->actual_type = SNDRV_PCM_AUDIO_TSTAMP_TYPE_DEFAULT;
366
367 return 0;
368 }
369
370 static struct snd_pcm_hardware azx_pcm_hw = {
371 .info = (SNDRV_PCM_INFO_MMAP |
372 SNDRV_PCM_INFO_INTERLEAVED |
373 SNDRV_PCM_INFO_BLOCK_TRANSFER |
374 SNDRV_PCM_INFO_MMAP_VALID |
375 /* No full-resume yet implemented */
376 /* SNDRV_PCM_INFO_RESUME |*/
377 SNDRV_PCM_INFO_PAUSE |
378 SNDRV_PCM_INFO_SYNC_START |
379 SNDRV_PCM_INFO_HAS_WALL_CLOCK | /* legacy */
380 SNDRV_PCM_INFO_HAS_LINK_ATIME |
381 SNDRV_PCM_INFO_NO_PERIOD_WAKEUP),
382 .formats = SNDRV_PCM_FMTBIT_S16_LE,
383 .rates = SNDRV_PCM_RATE_48000,
384 .rate_min = 48000,
385 .rate_max = 48000,
386 .channels_min = 2,
387 .channels_max = 2,
388 .buffer_bytes_max = AZX_MAX_BUF_SIZE,
389 .period_bytes_min = 128,
390 .period_bytes_max = AZX_MAX_BUF_SIZE / 2,
391 .periods_min = 2,
392 .periods_max = AZX_MAX_FRAG,
393 .fifo_size = 0,
394 };
395
396 static int azx_pcm_open(struct snd_pcm_substream *substream)
397 {
398 struct azx_pcm *apcm = snd_pcm_substream_chip(substream);
399 struct hda_pcm_stream *hinfo = to_hda_pcm_stream(substream);
400 struct azx *chip = apcm->chip;
401 struct azx_dev *azx_dev;
402 struct snd_pcm_runtime *runtime = substream->runtime;
403 int err;
404 int buff_step;
405
406 snd_hda_codec_pcm_get(apcm->info);
407 mutex_lock(&chip->open_mutex);
408 azx_dev = azx_assign_device(chip, substream);
409 trace_azx_pcm_open(chip, azx_dev);
410 if (azx_dev == NULL) {
411 err = -EBUSY;
412 goto unlock;
413 }
414 runtime->private_data = azx_dev;
415 runtime->hw = azx_pcm_hw;
416 runtime->hw.channels_min = hinfo->channels_min;
417 runtime->hw.channels_max = hinfo->channels_max;
418 runtime->hw.formats = hinfo->formats;
419 runtime->hw.rates = hinfo->rates;
420 snd_pcm_limit_hw_rates(runtime);
421 snd_pcm_hw_constraint_integer(runtime, SNDRV_PCM_HW_PARAM_PERIODS);
422
423 /* avoid wrap-around with wall-clock */
424 snd_pcm_hw_constraint_minmax(runtime, SNDRV_PCM_HW_PARAM_BUFFER_TIME,
425 20,
426 178000000);
427
428 if (chip->align_buffer_size)
429 /* constrain buffer sizes to be multiple of 128
430 bytes. This is more efficient in terms of memory
431 access but isn't required by the HDA spec and
432 prevents users from specifying exact period/buffer
433 sizes. For example for 44.1kHz, a period size set
434 to 20ms will be rounded to 19.59ms. */
435 buff_step = 128;
436 else
437 /* Don't enforce steps on buffer sizes, still need to
438 be multiple of 4 bytes (HDA spec). Tested on Intel
439 HDA controllers, may not work on all devices where
440 option needs to be disabled */
441 buff_step = 4;
442
443 snd_pcm_hw_constraint_step(runtime, 0, SNDRV_PCM_HW_PARAM_BUFFER_BYTES,
444 buff_step);
445 snd_pcm_hw_constraint_step(runtime, 0, SNDRV_PCM_HW_PARAM_PERIOD_BYTES,
446 buff_step);
447 snd_hda_power_up(apcm->codec);
448 if (hinfo->ops.open)
449 err = hinfo->ops.open(hinfo, apcm->codec, substream);
450 else
451 err = -ENODEV;
452 if (err < 0) {
453 azx_release_device(azx_dev);
454 goto powerdown;
455 }
456 snd_pcm_limit_hw_rates(runtime);
457 /* sanity check */
458 if (snd_BUG_ON(!runtime->hw.channels_min) ||
459 snd_BUG_ON(!runtime->hw.channels_max) ||
460 snd_BUG_ON(!runtime->hw.formats) ||
461 snd_BUG_ON(!runtime->hw.rates)) {
462 azx_release_device(azx_dev);
463 if (hinfo->ops.close)
464 hinfo->ops.close(hinfo, apcm->codec, substream);
465 err = -EINVAL;
466 goto powerdown;
467 }
468
469 /* disable LINK_ATIME timestamps for capture streams
470 until we figure out how to handle digital inputs */
471 if (substream->stream == SNDRV_PCM_STREAM_CAPTURE) {
472 runtime->hw.info &= ~SNDRV_PCM_INFO_HAS_WALL_CLOCK; /* legacy */
473 runtime->hw.info &= ~SNDRV_PCM_INFO_HAS_LINK_ATIME;
474 }
475
476 snd_pcm_set_sync(substream);
477 mutex_unlock(&chip->open_mutex);
478 return 0;
479
480 powerdown:
481 snd_hda_power_down(apcm->codec);
482 unlock:
483 mutex_unlock(&chip->open_mutex);
484 snd_hda_codec_pcm_put(apcm->info);
485 return err;
486 }
487
488 static int azx_pcm_mmap(struct snd_pcm_substream *substream,
489 struct vm_area_struct *area)
490 {
491 struct azx_pcm *apcm = snd_pcm_substream_chip(substream);
492 struct azx *chip = apcm->chip;
493 if (chip->ops->pcm_mmap_prepare)
494 chip->ops->pcm_mmap_prepare(substream, area);
495 return snd_pcm_lib_default_mmap(substream, area);
496 }
497
498 static struct snd_pcm_ops azx_pcm_ops = {
499 .open = azx_pcm_open,
500 .close = azx_pcm_close,
501 .ioctl = snd_pcm_lib_ioctl,
502 .hw_params = azx_pcm_hw_params,
503 .hw_free = azx_pcm_hw_free,
504 .prepare = azx_pcm_prepare,
505 .trigger = azx_pcm_trigger,
506 .pointer = azx_pcm_pointer,
507 .get_time_info = azx_get_time_info,
508 .mmap = azx_pcm_mmap,
509 .page = snd_pcm_sgbuf_ops_page,
510 };
511
512 static void azx_pcm_free(struct snd_pcm *pcm)
513 {
514 struct azx_pcm *apcm = pcm->private_data;
515 if (apcm) {
516 list_del(&apcm->list);
517 apcm->info->pcm = NULL;
518 kfree(apcm);
519 }
520 }
521
522 #define MAX_PREALLOC_SIZE (32 * 1024 * 1024)
523
524 int snd_hda_attach_pcm_stream(struct hda_bus *_bus, struct hda_codec *codec,
525 struct hda_pcm *cpcm)
526 {
527 struct hdac_bus *bus = &_bus->core;
528 struct azx *chip = bus_to_azx(bus);
529 struct snd_pcm *pcm;
530 struct azx_pcm *apcm;
531 int pcm_dev = cpcm->device;
532 unsigned int size;
533 int s, err;
534
535 list_for_each_entry(apcm, &chip->pcm_list, list) {
536 if (apcm->pcm->device == pcm_dev) {
537 dev_err(chip->card->dev, "PCM %d already exists\n",
538 pcm_dev);
539 return -EBUSY;
540 }
541 }
542 err = snd_pcm_new(chip->card, cpcm->name, pcm_dev,
543 cpcm->stream[SNDRV_PCM_STREAM_PLAYBACK].substreams,
544 cpcm->stream[SNDRV_PCM_STREAM_CAPTURE].substreams,
545 &pcm);
546 if (err < 0)
547 return err;
548 strlcpy(pcm->name, cpcm->name, sizeof(pcm->name));
549 apcm = kzalloc(sizeof(*apcm), GFP_KERNEL);
550 if (apcm == NULL)
551 return -ENOMEM;
552 apcm->chip = chip;
553 apcm->pcm = pcm;
554 apcm->codec = codec;
555 apcm->info = cpcm;
556 pcm->private_data = apcm;
557 pcm->private_free = azx_pcm_free;
558 if (cpcm->pcm_type == HDA_PCM_TYPE_MODEM)
559 pcm->dev_class = SNDRV_PCM_CLASS_MODEM;
560 list_add_tail(&apcm->list, &chip->pcm_list);
561 cpcm->pcm = pcm;
562 for (s = 0; s < 2; s++) {
563 if (cpcm->stream[s].substreams)
564 snd_pcm_set_ops(pcm, s, &azx_pcm_ops);
565 }
566 /* buffer pre-allocation */
567 size = CONFIG_SND_HDA_PREALLOC_SIZE * 1024;
568 if (size > MAX_PREALLOC_SIZE)
569 size = MAX_PREALLOC_SIZE;
570 snd_pcm_lib_preallocate_pages_for_all(pcm, SNDRV_DMA_TYPE_DEV_SG,
571 chip->card->dev,
572 size, MAX_PREALLOC_SIZE);
573 return 0;
574 }
575
576 static unsigned int azx_command_addr(u32 cmd)
577 {
578 unsigned int addr = cmd >> 28;
579
580 if (addr >= AZX_MAX_CODECS) {
581 snd_BUG();
582 addr = 0;
583 }
584
585 return addr;
586 }
587
588 /* receive a response */
589 static int azx_rirb_get_response(struct hdac_bus *bus, unsigned int addr,
590 unsigned int *res)
591 {
592 struct azx *chip = bus_to_azx(bus);
593 struct hda_bus *hbus = &chip->bus;
594 unsigned long timeout;
595 unsigned long loopcounter;
596 int do_poll = 0;
597
598 again:
599 timeout = jiffies + msecs_to_jiffies(1000);
600
601 for (loopcounter = 0;; loopcounter++) {
602 spin_lock_irq(&bus->reg_lock);
603 if (chip->polling_mode || do_poll)
604 snd_hdac_bus_update_rirb(bus);
605 if (!bus->rirb.cmds[addr]) {
606 if (!do_poll)
607 chip->poll_count = 0;
608 if (res)
609 *res = bus->rirb.res[addr]; /* the last value */
610 spin_unlock_irq(&bus->reg_lock);
611 return 0;
612 }
613 spin_unlock_irq(&bus->reg_lock);
614 if (time_after(jiffies, timeout))
615 break;
616 if (hbus->needs_damn_long_delay || loopcounter > 3000)
617 msleep(2); /* temporary workaround */
618 else {
619 udelay(10);
620 cond_resched();
621 }
622 }
623
624 if (hbus->no_response_fallback)
625 return -EIO;
626
627 if (!chip->polling_mode && chip->poll_count < 2) {
628 dev_dbg(chip->card->dev,
629 "azx_get_response timeout, polling the codec once: last cmd=0x%08x\n",
630 bus->last_cmd[addr]);
631 do_poll = 1;
632 chip->poll_count++;
633 goto again;
634 }
635
636
637 if (!chip->polling_mode) {
638 dev_warn(chip->card->dev,
639 "azx_get_response timeout, switching to polling mode: last cmd=0x%08x\n",
640 bus->last_cmd[addr]);
641 chip->polling_mode = 1;
642 goto again;
643 }
644
645 if (chip->msi) {
646 dev_warn(chip->card->dev,
647 "No response from codec, disabling MSI: last cmd=0x%08x\n",
648 bus->last_cmd[addr]);
649 if (chip->ops->disable_msi_reset_irq &&
650 chip->ops->disable_msi_reset_irq(chip) < 0)
651 return -EIO;
652 goto again;
653 }
654
655 if (chip->probing) {
656 /* If this critical timeout happens during the codec probing
657 * phase, this is likely an access to a non-existing codec
658 * slot. Better to return an error and reset the system.
659 */
660 return -EIO;
661 }
662
663 /* a fatal communication error; need either to reset or to fallback
664 * to the single_cmd mode
665 */
666 if (hbus->allow_bus_reset && !hbus->response_reset && !hbus->in_reset) {
667 hbus->response_reset = 1;
668 return -EAGAIN; /* give a chance to retry */
669 }
670
671 dev_err(chip->card->dev,
672 "azx_get_response timeout, switching to single_cmd mode: last cmd=0x%08x\n",
673 bus->last_cmd[addr]);
674 chip->single_cmd = 1;
675 hbus->response_reset = 0;
676 snd_hdac_bus_stop_cmd_io(bus);
677 return -EIO;
678 }
679
680 /*
681 * Use the single immediate command instead of CORB/RIRB for simplicity
682 *
683 * Note: according to Intel, this is not preferred use. The command was
684 * intended for the BIOS only, and may get confused with unsolicited
685 * responses. So, we shouldn't use it for normal operation from the
686 * driver.
687 * I left the codes, however, for debugging/testing purposes.
688 */
689
690 /* receive a response */
691 static int azx_single_wait_for_response(struct azx *chip, unsigned int addr)
692 {
693 int timeout = 50;
694
695 while (timeout--) {
696 /* check IRV busy bit */
697 if (azx_readw(chip, IRS) & AZX_IRS_VALID) {
698 /* reuse rirb.res as the response return value */
699 azx_bus(chip)->rirb.res[addr] = azx_readl(chip, IR);
700 return 0;
701 }
702 udelay(1);
703 }
704 if (printk_ratelimit())
705 dev_dbg(chip->card->dev, "get_response timeout: IRS=0x%x\n",
706 azx_readw(chip, IRS));
707 azx_bus(chip)->rirb.res[addr] = -1;
708 return -EIO;
709 }
710
711 /* send a command */
712 static int azx_single_send_cmd(struct hdac_bus *bus, u32 val)
713 {
714 struct azx *chip = bus_to_azx(bus);
715 unsigned int addr = azx_command_addr(val);
716 int timeout = 50;
717
718 bus->last_cmd[azx_command_addr(val)] = val;
719 while (timeout--) {
720 /* check ICB busy bit */
721 if (!((azx_readw(chip, IRS) & AZX_IRS_BUSY))) {
722 /* Clear IRV valid bit */
723 azx_writew(chip, IRS, azx_readw(chip, IRS) |
724 AZX_IRS_VALID);
725 azx_writel(chip, IC, val);
726 azx_writew(chip, IRS, azx_readw(chip, IRS) |
727 AZX_IRS_BUSY);
728 return azx_single_wait_for_response(chip, addr);
729 }
730 udelay(1);
731 }
732 if (printk_ratelimit())
733 dev_dbg(chip->card->dev,
734 "send_cmd timeout: IRS=0x%x, val=0x%x\n",
735 azx_readw(chip, IRS), val);
736 return -EIO;
737 }
738
739 /* receive a response */
740 static int azx_single_get_response(struct hdac_bus *bus, unsigned int addr,
741 unsigned int *res)
742 {
743 if (res)
744 *res = bus->rirb.res[addr];
745 return 0;
746 }
747
748 /*
749 * The below are the main callbacks from hda_codec.
750 *
751 * They are just the skeleton to call sub-callbacks according to the
752 * current setting of chip->single_cmd.
753 */
754
755 /* send a command */
756 static int azx_send_cmd(struct hdac_bus *bus, unsigned int val)
757 {
758 struct azx *chip = bus_to_azx(bus);
759
760 if (chip->disabled)
761 return 0;
762 if (chip->single_cmd)
763 return azx_single_send_cmd(bus, val);
764 else
765 return snd_hdac_bus_send_cmd(bus, val);
766 }
767
768 /* get a response */
769 static int azx_get_response(struct hdac_bus *bus, unsigned int addr,
770 unsigned int *res)
771 {
772 struct azx *chip = bus_to_azx(bus);
773
774 if (chip->disabled)
775 return 0;
776 if (chip->single_cmd)
777 return azx_single_get_response(bus, addr, res);
778 else
779 return azx_rirb_get_response(bus, addr, res);
780 }
781
782 static int azx_link_power(struct hdac_bus *bus, bool enable)
783 {
784 struct azx *chip = bus_to_azx(bus);
785
786 if (chip->ops->link_power)
787 return chip->ops->link_power(chip, enable);
788 else
789 return -EINVAL;
790 }
791
792 static const struct hdac_bus_ops bus_core_ops = {
793 .command = azx_send_cmd,
794 .get_response = azx_get_response,
795 .link_power = azx_link_power,
796 };
797
798 #ifdef CONFIG_SND_HDA_DSP_LOADER
799 /*
800 * DSP loading code (e.g. for CA0132)
801 */
802
803 /* use the first stream for loading DSP */
804 static struct azx_dev *
805 azx_get_dsp_loader_dev(struct azx *chip)
806 {
807 struct hdac_bus *bus = azx_bus(chip);
808 struct hdac_stream *s;
809
810 list_for_each_entry(s, &bus->stream_list, list)
811 if (s->index == chip->playback_index_offset)
812 return stream_to_azx_dev(s);
813
814 return NULL;
815 }
816
817 int snd_hda_codec_load_dsp_prepare(struct hda_codec *codec, unsigned int format,
818 unsigned int byte_size,
819 struct snd_dma_buffer *bufp)
820 {
821 struct hdac_bus *bus = &codec->bus->core;
822 struct azx *chip = bus_to_azx(bus);
823 struct azx_dev *azx_dev;
824 struct hdac_stream *hstr;
825 bool saved = false;
826 int err;
827
828 azx_dev = azx_get_dsp_loader_dev(chip);
829 hstr = azx_stream(azx_dev);
830 spin_lock_irq(&bus->reg_lock);
831 if (hstr->opened) {
832 chip->saved_azx_dev = *azx_dev;
833 saved = true;
834 }
835 spin_unlock_irq(&bus->reg_lock);
836
837 err = snd_hdac_dsp_prepare(hstr, format, byte_size, bufp);
838 if (err < 0) {
839 spin_lock_irq(&bus->reg_lock);
840 if (saved)
841 *azx_dev = chip->saved_azx_dev;
842 spin_unlock_irq(&bus->reg_lock);
843 return err;
844 }
845
846 hstr->prepared = 0;
847 return err;
848 }
849 EXPORT_SYMBOL_GPL(snd_hda_codec_load_dsp_prepare);
850
851 void snd_hda_codec_load_dsp_trigger(struct hda_codec *codec, bool start)
852 {
853 struct hdac_bus *bus = &codec->bus->core;
854 struct azx *chip = bus_to_azx(bus);
855 struct azx_dev *azx_dev = azx_get_dsp_loader_dev(chip);
856
857 snd_hdac_dsp_trigger(azx_stream(azx_dev), start);
858 }
859 EXPORT_SYMBOL_GPL(snd_hda_codec_load_dsp_trigger);
860
861 void snd_hda_codec_load_dsp_cleanup(struct hda_codec *codec,
862 struct snd_dma_buffer *dmab)
863 {
864 struct hdac_bus *bus = &codec->bus->core;
865 struct azx *chip = bus_to_azx(bus);
866 struct azx_dev *azx_dev = azx_get_dsp_loader_dev(chip);
867 struct hdac_stream *hstr = azx_stream(azx_dev);
868
869 if (!dmab->area || !hstr->locked)
870 return;
871
872 snd_hdac_dsp_cleanup(hstr, dmab);
873 spin_lock_irq(&bus->reg_lock);
874 if (hstr->opened)
875 *azx_dev = chip->saved_azx_dev;
876 hstr->locked = false;
877 spin_unlock_irq(&bus->reg_lock);
878 }
879 EXPORT_SYMBOL_GPL(snd_hda_codec_load_dsp_cleanup);
880 #endif /* CONFIG_SND_HDA_DSP_LOADER */
881
882 /*
883 * reset and start the controller registers
884 */
885 void azx_init_chip(struct azx *chip, bool full_reset)
886 {
887 if (snd_hdac_bus_init_chip(azx_bus(chip), full_reset)) {
888 /* correct RINTCNT for CXT */
889 if (chip->driver_caps & AZX_DCAPS_CTX_WORKAROUND)
890 azx_writew(chip, RINTCNT, 0xc0);
891 }
892 }
893 EXPORT_SYMBOL_GPL(azx_init_chip);
894
895 void azx_stop_all_streams(struct azx *chip)
896 {
897 struct hdac_bus *bus = azx_bus(chip);
898 struct hdac_stream *s;
899
900 list_for_each_entry(s, &bus->stream_list, list)
901 snd_hdac_stream_stop(s);
902 }
903 EXPORT_SYMBOL_GPL(azx_stop_all_streams);
904
905 void azx_stop_chip(struct azx *chip)
906 {
907 snd_hdac_bus_stop_chip(azx_bus(chip));
908 }
909 EXPORT_SYMBOL_GPL(azx_stop_chip);
910
911 /*
912 * interrupt handler
913 */
914 static void stream_update(struct hdac_bus *bus, struct hdac_stream *s)
915 {
916 struct azx *chip = bus_to_azx(bus);
917 struct azx_dev *azx_dev = stream_to_azx_dev(s);
918
919 /* check whether this IRQ is really acceptable */
920 if (!chip->ops->position_check ||
921 chip->ops->position_check(chip, azx_dev)) {
922 spin_unlock(&bus->reg_lock);
923 snd_pcm_period_elapsed(azx_stream(azx_dev)->substream);
924 spin_lock(&bus->reg_lock);
925 }
926 }
927
928 irqreturn_t azx_interrupt(int irq, void *dev_id)
929 {
930 struct azx *chip = dev_id;
931 struct hdac_bus *bus = azx_bus(chip);
932 u32 status;
933
934 #ifdef CONFIG_PM
935 if (azx_has_pm_runtime(chip))
936 if (!pm_runtime_active(chip->card->dev))
937 return IRQ_NONE;
938 #endif
939
940 spin_lock(&bus->reg_lock);
941
942 if (chip->disabled) {
943 spin_unlock(&bus->reg_lock);
944 return IRQ_NONE;
945 }
946
947 status = azx_readl(chip, INTSTS);
948 if (status == 0 || status == 0xffffffff) {
949 spin_unlock(&bus->reg_lock);
950 return IRQ_NONE;
951 }
952
953 snd_hdac_bus_handle_stream_irq(bus, status, stream_update);
954
955 /* clear rirb int */
956 status = azx_readb(chip, RIRBSTS);
957 if (status & RIRB_INT_MASK) {
958 if (status & RIRB_INT_RESPONSE) {
959 if (chip->driver_caps & AZX_DCAPS_CTX_WORKAROUND)
960 udelay(80);
961 snd_hdac_bus_update_rirb(bus);
962 }
963 azx_writeb(chip, RIRBSTS, RIRB_INT_MASK);
964 }
965
966 spin_unlock(&bus->reg_lock);
967
968 return IRQ_HANDLED;
969 }
970 EXPORT_SYMBOL_GPL(azx_interrupt);
971
972 /*
973 * Codec initerface
974 */
975
976 /*
977 * Probe the given codec address
978 */
979 static int probe_codec(struct azx *chip, int addr)
980 {
981 unsigned int cmd = (addr << 28) | (AC_NODE_ROOT << 20) |
982 (AC_VERB_PARAMETERS << 8) | AC_PAR_VENDOR_ID;
983 struct hdac_bus *bus = azx_bus(chip);
984 int err;
985 unsigned int res = -1;
986
987 mutex_lock(&bus->cmd_mutex);
988 chip->probing = 1;
989 azx_send_cmd(bus, cmd);
990 err = azx_get_response(bus, addr, &res);
991 chip->probing = 0;
992 mutex_unlock(&bus->cmd_mutex);
993 if (err < 0 || res == -1)
994 return -EIO;
995 dev_dbg(chip->card->dev, "codec #%d probed OK\n", addr);
996 return 0;
997 }
998
999 void snd_hda_bus_reset(struct hda_bus *bus)
1000 {
1001 struct azx *chip = bus_to_azx(&bus->core);
1002
1003 bus->in_reset = 1;
1004 azx_stop_chip(chip);
1005 azx_init_chip(chip, true);
1006 if (bus->core.chip_init)
1007 snd_hda_bus_reset_codecs(bus);
1008 bus->in_reset = 0;
1009 }
1010
1011 static int get_jackpoll_interval(struct azx *chip)
1012 {
1013 int i;
1014 unsigned int j;
1015
1016 if (!chip->jackpoll_ms)
1017 return 0;
1018
1019 i = chip->jackpoll_ms[chip->dev_index];
1020 if (i == 0)
1021 return 0;
1022 if (i < 50 || i > 60000)
1023 j = 0;
1024 else
1025 j = msecs_to_jiffies(i);
1026 if (j == 0)
1027 dev_warn(chip->card->dev,
1028 "jackpoll_ms value out of range: %d\n", i);
1029 return j;
1030 }
1031
1032 /* HD-audio bus initialization */
1033 int azx_bus_init(struct azx *chip, const char *model,
1034 const struct hdac_io_ops *io_ops)
1035 {
1036 struct hda_bus *bus = &chip->bus;
1037 int err;
1038
1039 err = snd_hdac_bus_init(&bus->core, chip->card->dev, &bus_core_ops,
1040 io_ops);
1041 if (err < 0)
1042 return err;
1043
1044 bus->card = chip->card;
1045 mutex_init(&bus->prepare_mutex);
1046 bus->pci = chip->pci;
1047 bus->modelname = model;
1048 bus->mixer_assigned = -1;
1049 bus->core.snoop = azx_snoop(chip);
1050 if (chip->get_position[0] != azx_get_pos_lpib ||
1051 chip->get_position[1] != azx_get_pos_lpib)
1052 bus->core.use_posbuf = true;
1053 if (chip->bdl_pos_adj)
1054 bus->core.bdl_pos_adj = chip->bdl_pos_adj[chip->dev_index];
1055 if (chip->driver_caps & AZX_DCAPS_CORBRP_SELF_CLEAR)
1056 bus->core.corbrp_self_clear = true;
1057
1058 if (chip->driver_caps & AZX_DCAPS_4K_BDLE_BOUNDARY)
1059 bus->core.align_bdle_4k = true;
1060
1061 /* AMD chipsets often cause the communication stalls upon certain
1062 * sequence like the pin-detection. It seems that forcing the synced
1063 * access works around the stall. Grrr...
1064 */
1065 if (chip->driver_caps & AZX_DCAPS_SYNC_WRITE) {
1066 dev_dbg(chip->card->dev, "Enable sync_write for stable communication\n");
1067 bus->core.sync_write = 1;
1068 bus->allow_bus_reset = 1;
1069 }
1070
1071 return 0;
1072 }
1073 EXPORT_SYMBOL_GPL(azx_bus_init);
1074
1075 /* Probe codecs */
1076 int azx_probe_codecs(struct azx *chip, unsigned int max_slots)
1077 {
1078 struct hdac_bus *bus = azx_bus(chip);
1079 int c, codecs, err;
1080
1081 codecs = 0;
1082 if (!max_slots)
1083 max_slots = AZX_DEFAULT_CODECS;
1084
1085 /* First try to probe all given codec slots */
1086 for (c = 0; c < max_slots; c++) {
1087 if ((bus->codec_mask & (1 << c)) & chip->codec_probe_mask) {
1088 if (probe_codec(chip, c) < 0) {
1089 /* Some BIOSen give you wrong codec addresses
1090 * that don't exist
1091 */
1092 dev_warn(chip->card->dev,
1093 "Codec #%d probe error; disabling it...\n", c);
1094 bus->codec_mask &= ~(1 << c);
1095 /* More badly, accessing to a non-existing
1096 * codec often screws up the controller chip,
1097 * and disturbs the further communications.
1098 * Thus if an error occurs during probing,
1099 * better to reset the controller chip to
1100 * get back to the sanity state.
1101 */
1102 azx_stop_chip(chip);
1103 azx_init_chip(chip, true);
1104 }
1105 }
1106 }
1107
1108 /* Then create codec instances */
1109 for (c = 0; c < max_slots; c++) {
1110 if ((bus->codec_mask & (1 << c)) & chip->codec_probe_mask) {
1111 struct hda_codec *codec;
1112 err = snd_hda_codec_new(&chip->bus, chip->card, c, &codec);
1113 if (err < 0)
1114 continue;
1115 codec->jackpoll_interval = get_jackpoll_interval(chip);
1116 codec->beep_mode = chip->beep_mode;
1117 codecs++;
1118 }
1119 }
1120 if (!codecs) {
1121 dev_err(chip->card->dev, "no codecs initialized\n");
1122 return -ENXIO;
1123 }
1124 return 0;
1125 }
1126 EXPORT_SYMBOL_GPL(azx_probe_codecs);
1127
1128 /* configure each codec instance */
1129 int azx_codec_configure(struct azx *chip)
1130 {
1131 struct hda_codec *codec, *next;
1132
1133 /* use _safe version here since snd_hda_codec_configure() deregisters
1134 * the device upon error and deletes itself from the bus list.
1135 */
1136 list_for_each_codec_safe(codec, next, &chip->bus) {
1137 snd_hda_codec_configure(codec);
1138 }
1139 return 0;
1140 }
1141 EXPORT_SYMBOL_GPL(azx_codec_configure);
1142
1143 static int stream_direction(struct azx *chip, unsigned char index)
1144 {
1145 if (index >= chip->capture_index_offset &&
1146 index < chip->capture_index_offset + chip->capture_streams)
1147 return SNDRV_PCM_STREAM_CAPTURE;
1148 return SNDRV_PCM_STREAM_PLAYBACK;
1149 }
1150
1151 /* initialize SD streams */
1152 int azx_init_streams(struct azx *chip)
1153 {
1154 int i;
1155 int stream_tags[2] = { 0, 0 };
1156
1157 /* initialize each stream (aka device)
1158 * assign the starting bdl address to each stream (device)
1159 * and initialize
1160 */
1161 for (i = 0; i < chip->num_streams; i++) {
1162 struct azx_dev *azx_dev = kzalloc(sizeof(*azx_dev), GFP_KERNEL);
1163 int dir, tag;
1164
1165 if (!azx_dev)
1166 return -ENOMEM;
1167
1168 dir = stream_direction(chip, i);
1169 /* stream tag must be unique throughout
1170 * the stream direction group,
1171 * valid values 1...15
1172 * use separate stream tag if the flag
1173 * AZX_DCAPS_SEPARATE_STREAM_TAG is used
1174 */
1175 if (chip->driver_caps & AZX_DCAPS_SEPARATE_STREAM_TAG)
1176 tag = ++stream_tags[dir];
1177 else
1178 tag = i + 1;
1179 snd_hdac_stream_init(azx_bus(chip), azx_stream(azx_dev),
1180 i, dir, tag);
1181 }
1182
1183 return 0;
1184 }
1185 EXPORT_SYMBOL_GPL(azx_init_streams);
1186
1187 void azx_free_streams(struct azx *chip)
1188 {
1189 struct hdac_bus *bus = azx_bus(chip);
1190 struct hdac_stream *s;
1191
1192 while (!list_empty(&bus->stream_list)) {
1193 s = list_first_entry(&bus->stream_list, struct hdac_stream, list);
1194 list_del(&s->list);
1195 kfree(stream_to_azx_dev(s));
1196 }
1197 }
1198 EXPORT_SYMBOL_GPL(azx_free_streams);
Linux with added FPC-III support