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TOMOYO Linux Cross Reference
Linux/sound/aoa/codecs/tas.c

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  1 /*
  2  * Apple Onboard Audio driver for tas codec
  3  *
  4  * Copyright 2006 Johannes Berg <johannes@sipsolutions.net>
  5  *
  6  * GPL v2, can be found in COPYING.
  7  *
  8  * Open questions:
  9  *  - How to distinguish between 3004 and versions?
 10  *
 11  * FIXMEs:
 12  *  - This codec driver doesn't honour the 'connected'
 13  *    property of the aoa_codec struct, hence if
 14  *    it is used in machines where not everything is
 15  *    connected it will display wrong mixer elements.
 16  *  - Driver assumes that the microphone is always
 17  *    monaureal and connected to the right channel of
 18  *    the input. This should also be a codec-dependent
 19  *    flag, maybe the codec should have 3 different
 20  *    bits for the three different possibilities how
 21  *    it can be hooked up...
 22  *    But as long as I don't see any hardware hooked
 23  *    up that way...
 24  *  - As Apple notes in their code, the tas3004 seems
 25  *    to delay the right channel by one sample. You can
 26  *    see this when for example recording stereo in
 27  *    audacity, or recording the tas output via cable
 28  *    on another machine (use a sinus generator or so).
 29  *    I tried programming the BiQuads but couldn't
 30  *    make the delay work, maybe someone can read the
 31  *    datasheet and fix it. The relevant Apple comment
 32  *    is in AppleTAS3004Audio.cpp lines 1637 ff. Note
 33  *    that their comment describing how they program
 34  *    the filters sucks...
 35  *
 36  * Other things:
 37  *  - this should actually register *two* aoa_codec
 38  *    structs since it has two inputs. Then it must
 39  *    use the prepare callback to forbid running the
 40  *    secondary output on a different clock.
 41  *    Also, whatever bus knows how to do this must
 42  *    provide two soundbus_dev devices and the fabric
 43  *    must be able to link them correctly.
 44  *
 45  *    I don't even know if Apple ever uses the second
 46  *    port on the tas3004 though, I don't think their
 47  *    i2s controllers can even do it. OTOH, they all
 48  *    derive the clocks from common clocks, so it
 49  *    might just be possible. The framework allows the
 50  *    codec to refine the transfer_info items in the
 51  *    usable callback, so we can simply remove the
 52  *    rates the second instance is not using when it
 53  *    actually is in use.
 54  *    Maybe we'll need to make the sound busses have
 55  *    a 'clock group id' value so the codec can
 56  *    determine if the two outputs can be driven at
 57  *    the same time. But that is likely overkill, up
 58  *    to the fabric to not link them up incorrectly,
 59  *    and up to the hardware designer to not wire
 60  *    them up in some weird unusable way.
 61  */
 62 #include <stddef.h>
 63 #include <linux/i2c.h>
 64 #include <asm/pmac_low_i2c.h>
 65 #include <asm/prom.h>
 66 #include <linux/delay.h>
 67 #include <linux/module.h>
 68 #include <linux/mutex.h>
 69 #include <linux/slab.h>
 70 
 71 MODULE_AUTHOR("Johannes Berg <johannes@sipsolutions.net>");
 72 MODULE_LICENSE("GPL");
 73 MODULE_DESCRIPTION("tas codec driver for snd-aoa");
 74 
 75 #include "tas.h"
 76 #include "tas-gain-table.h"
 77 #include "tas-basstreble.h"
 78 #include "../aoa.h"
 79 #include "../soundbus/soundbus.h"
 80 
 81 #define PFX "snd-aoa-codec-tas: "
 82 
 83 
 84 struct tas {
 85         struct aoa_codec        codec;
 86         struct i2c_client       *i2c;
 87         u32                     mute_l:1, mute_r:1 ,
 88                                 controls_created:1 ,
 89                                 drc_enabled:1,
 90                                 hw_enabled:1;
 91         u8                      cached_volume_l, cached_volume_r;
 92         u8                      mixer_l[3], mixer_r[3];
 93         u8                      bass, treble;
 94         u8                      acr;
 95         int                     drc_range;
 96         /* protects hardware access against concurrency from
 97          * userspace when hitting controls and during
 98          * codec init/suspend/resume */
 99         struct mutex            mtx;
100 };
101 
102 static int tas_reset_init(struct tas *tas);
103 
104 static struct tas *codec_to_tas(struct aoa_codec *codec)
105 {
106         return container_of(codec, struct tas, codec);
107 }
108 
109 static inline int tas_write_reg(struct tas *tas, u8 reg, u8 len, u8 *data)
110 {
111         if (len == 1)
112                 return i2c_smbus_write_byte_data(tas->i2c, reg, *data);
113         else
114                 return i2c_smbus_write_i2c_block_data(tas->i2c, reg, len, data);
115 }
116 
117 static void tas3004_set_drc(struct tas *tas)
118 {
119         unsigned char val[6];
120 
121         if (tas->drc_enabled)
122                 val[0] = 0x50; /* 3:1 above threshold */
123         else
124                 val[0] = 0x51; /* disabled */
125         val[1] = 0x02; /* 1:1 below threshold */
126         if (tas->drc_range > 0xef)
127                 val[2] = 0xef;
128         else if (tas->drc_range < 0)
129                 val[2] = 0x00;
130         else
131                 val[2] = tas->drc_range;
132         val[3] = 0xb0;
133         val[4] = 0x60;
134         val[5] = 0xa0;
135 
136         tas_write_reg(tas, TAS_REG_DRC, 6, val);
137 }
138 
139 static void tas_set_treble(struct tas *tas)
140 {
141         u8 tmp;
142 
143         tmp = tas3004_treble(tas->treble);
144         tas_write_reg(tas, TAS_REG_TREBLE, 1, &tmp);
145 }
146 
147 static void tas_set_bass(struct tas *tas)
148 {
149         u8 tmp;
150 
151         tmp = tas3004_bass(tas->bass);
152         tas_write_reg(tas, TAS_REG_BASS, 1, &tmp);
153 }
154 
155 static void tas_set_volume(struct tas *tas)
156 {
157         u8 block[6];
158         int tmp;
159         u8 left, right;
160 
161         left = tas->cached_volume_l;
162         right = tas->cached_volume_r;
163 
164         if (left > 177) left = 177;
165         if (right > 177) right = 177;
166 
167         if (tas->mute_l) left = 0;
168         if (tas->mute_r) right = 0;
169 
170         /* analysing the volume and mixer tables shows
171          * that they are similar enough when we shift
172          * the mixer table down by 4 bits. The error
173          * is miniscule, in just one item the error
174          * is 1, at a value of 0x07f17b (mixer table
175          * value is 0x07f17a) */
176         tmp = tas_gaintable[left];
177         block[0] = tmp>>20;
178         block[1] = tmp>>12;
179         block[2] = tmp>>4;
180         tmp = tas_gaintable[right];
181         block[3] = tmp>>20;
182         block[4] = tmp>>12;
183         block[5] = tmp>>4;
184         tas_write_reg(tas, TAS_REG_VOL, 6, block);
185 }
186 
187 static void tas_set_mixer(struct tas *tas)
188 {
189         u8 block[9];
190         int tmp, i;
191         u8 val;
192 
193         for (i=0;i<3;i++) {
194                 val = tas->mixer_l[i];
195                 if (val > 177) val = 177;
196                 tmp = tas_gaintable[val];
197                 block[3*i+0] = tmp>>16;
198                 block[3*i+1] = tmp>>8;
199                 block[3*i+2] = tmp;
200         }
201         tas_write_reg(tas, TAS_REG_LMIX, 9, block);
202 
203         for (i=0;i<3;i++) {
204                 val = tas->mixer_r[i];
205                 if (val > 177) val = 177;
206                 tmp = tas_gaintable[val];
207                 block[3*i+0] = tmp>>16;
208                 block[3*i+1] = tmp>>8;
209                 block[3*i+2] = tmp;
210         }
211         tas_write_reg(tas, TAS_REG_RMIX, 9, block);
212 }
213 
214 /* alsa stuff */
215 
216 static int tas_dev_register(struct snd_device *dev)
217 {
218         return 0;
219 }
220 
221 static struct snd_device_ops ops = {
222         .dev_register = tas_dev_register,
223 };
224 
225 static int tas_snd_vol_info(struct snd_kcontrol *kcontrol,
226         struct snd_ctl_elem_info *uinfo)
227 {
228         uinfo->type = SNDRV_CTL_ELEM_TYPE_INTEGER;
229         uinfo->count = 2;
230         uinfo->value.integer.min = 0;
231         uinfo->value.integer.max = 177;
232         return 0;
233 }
234 
235 static int tas_snd_vol_get(struct snd_kcontrol *kcontrol,
236         struct snd_ctl_elem_value *ucontrol)
237 {
238         struct tas *tas = snd_kcontrol_chip(kcontrol);
239 
240         mutex_lock(&tas->mtx);
241         ucontrol->value.integer.value[0] = tas->cached_volume_l;
242         ucontrol->value.integer.value[1] = tas->cached_volume_r;
243         mutex_unlock(&tas->mtx);
244         return 0;
245 }
246 
247 static int tas_snd_vol_put(struct snd_kcontrol *kcontrol,
248         struct snd_ctl_elem_value *ucontrol)
249 {
250         struct tas *tas = snd_kcontrol_chip(kcontrol);
251 
252         if (ucontrol->value.integer.value[0] < 0 ||
253             ucontrol->value.integer.value[0] > 177)
254                 return -EINVAL;
255         if (ucontrol->value.integer.value[1] < 0 ||
256             ucontrol->value.integer.value[1] > 177)
257                 return -EINVAL;
258 
259         mutex_lock(&tas->mtx);
260         if (tas->cached_volume_l == ucontrol->value.integer.value[0]
261          && tas->cached_volume_r == ucontrol->value.integer.value[1]) {
262                 mutex_unlock(&tas->mtx);
263                 return 0;
264         }
265 
266         tas->cached_volume_l = ucontrol->value.integer.value[0];
267         tas->cached_volume_r = ucontrol->value.integer.value[1];
268         if (tas->hw_enabled)
269                 tas_set_volume(tas);
270         mutex_unlock(&tas->mtx);
271         return 1;
272 }
273 
274 static struct snd_kcontrol_new volume_control = {
275         .iface = SNDRV_CTL_ELEM_IFACE_MIXER,
276         .name = "Master Playback Volume",
277         .access = SNDRV_CTL_ELEM_ACCESS_READWRITE,
278         .info = tas_snd_vol_info,
279         .get = tas_snd_vol_get,
280         .put = tas_snd_vol_put,
281 };
282 
283 #define tas_snd_mute_info       snd_ctl_boolean_stereo_info
284 
285 static int tas_snd_mute_get(struct snd_kcontrol *kcontrol,
286         struct snd_ctl_elem_value *ucontrol)
287 {
288         struct tas *tas = snd_kcontrol_chip(kcontrol);
289 
290         mutex_lock(&tas->mtx);
291         ucontrol->value.integer.value[0] = !tas->mute_l;
292         ucontrol->value.integer.value[1] = !tas->mute_r;
293         mutex_unlock(&tas->mtx);
294         return 0;
295 }
296 
297 static int tas_snd_mute_put(struct snd_kcontrol *kcontrol,
298         struct snd_ctl_elem_value *ucontrol)
299 {
300         struct tas *tas = snd_kcontrol_chip(kcontrol);
301 
302         mutex_lock(&tas->mtx);
303         if (tas->mute_l == !ucontrol->value.integer.value[0]
304          && tas->mute_r == !ucontrol->value.integer.value[1]) {
305                 mutex_unlock(&tas->mtx);
306                 return 0;
307         }
308 
309         tas->mute_l = !ucontrol->value.integer.value[0];
310         tas->mute_r = !ucontrol->value.integer.value[1];
311         if (tas->hw_enabled)
312                 tas_set_volume(tas);
313         mutex_unlock(&tas->mtx);
314         return 1;
315 }
316 
317 static struct snd_kcontrol_new mute_control = {
318         .iface = SNDRV_CTL_ELEM_IFACE_MIXER,
319         .name = "Master Playback Switch",
320         .access = SNDRV_CTL_ELEM_ACCESS_READWRITE,
321         .info = tas_snd_mute_info,
322         .get = tas_snd_mute_get,
323         .put = tas_snd_mute_put,
324 };
325 
326 static int tas_snd_mixer_info(struct snd_kcontrol *kcontrol,
327         struct snd_ctl_elem_info *uinfo)
328 {
329         uinfo->type = SNDRV_CTL_ELEM_TYPE_INTEGER;
330         uinfo->count = 2;
331         uinfo->value.integer.min = 0;
332         uinfo->value.integer.max = 177;
333         return 0;
334 }
335 
336 static int tas_snd_mixer_get(struct snd_kcontrol *kcontrol,
337         struct snd_ctl_elem_value *ucontrol)
338 {
339         struct tas *tas = snd_kcontrol_chip(kcontrol);
340         int idx = kcontrol->private_value;
341 
342         mutex_lock(&tas->mtx);
343         ucontrol->value.integer.value[0] = tas->mixer_l[idx];
344         ucontrol->value.integer.value[1] = tas->mixer_r[idx];
345         mutex_unlock(&tas->mtx);
346 
347         return 0;
348 }
349 
350 static int tas_snd_mixer_put(struct snd_kcontrol *kcontrol,
351         struct snd_ctl_elem_value *ucontrol)
352 {
353         struct tas *tas = snd_kcontrol_chip(kcontrol);
354         int idx = kcontrol->private_value;
355 
356         mutex_lock(&tas->mtx);
357         if (tas->mixer_l[idx] == ucontrol->value.integer.value[0]
358          && tas->mixer_r[idx] == ucontrol->value.integer.value[1]) {
359                 mutex_unlock(&tas->mtx);
360                 return 0;
361         }
362 
363         tas->mixer_l[idx] = ucontrol->value.integer.value[0];
364         tas->mixer_r[idx] = ucontrol->value.integer.value[1];
365 
366         if (tas->hw_enabled)
367                 tas_set_mixer(tas);
368         mutex_unlock(&tas->mtx);
369         return 1;
370 }
371 
372 #define MIXER_CONTROL(n,descr,idx)                      \
373 static struct snd_kcontrol_new n##_control = {          \
374         .iface = SNDRV_CTL_ELEM_IFACE_MIXER,            \
375         .name = descr " Playback Volume",               \
376         .access = SNDRV_CTL_ELEM_ACCESS_READWRITE,      \
377         .info = tas_snd_mixer_info,                     \
378         .get = tas_snd_mixer_get,                       \
379         .put = tas_snd_mixer_put,                       \
380         .private_value = idx,                           \
381 }
382 
383 MIXER_CONTROL(pcm1, "PCM", 0);
384 MIXER_CONTROL(monitor, "Monitor", 2);
385 
386 static int tas_snd_drc_range_info(struct snd_kcontrol *kcontrol,
387         struct snd_ctl_elem_info *uinfo)
388 {
389         uinfo->type = SNDRV_CTL_ELEM_TYPE_INTEGER;
390         uinfo->count = 1;
391         uinfo->value.integer.min = 0;
392         uinfo->value.integer.max = TAS3004_DRC_MAX;
393         return 0;
394 }
395 
396 static int tas_snd_drc_range_get(struct snd_kcontrol *kcontrol,
397         struct snd_ctl_elem_value *ucontrol)
398 {
399         struct tas *tas = snd_kcontrol_chip(kcontrol);
400 
401         mutex_lock(&tas->mtx);
402         ucontrol->value.integer.value[0] = tas->drc_range;
403         mutex_unlock(&tas->mtx);
404         return 0;
405 }
406 
407 static int tas_snd_drc_range_put(struct snd_kcontrol *kcontrol,
408         struct snd_ctl_elem_value *ucontrol)
409 {
410         struct tas *tas = snd_kcontrol_chip(kcontrol);
411 
412         if (ucontrol->value.integer.value[0] < 0 ||
413             ucontrol->value.integer.value[0] > TAS3004_DRC_MAX)
414                 return -EINVAL;
415 
416         mutex_lock(&tas->mtx);
417         if (tas->drc_range == ucontrol->value.integer.value[0]) {
418                 mutex_unlock(&tas->mtx);
419                 return 0;
420         }
421 
422         tas->drc_range = ucontrol->value.integer.value[0];
423         if (tas->hw_enabled)
424                 tas3004_set_drc(tas);
425         mutex_unlock(&tas->mtx);
426         return 1;
427 }
428 
429 static struct snd_kcontrol_new drc_range_control = {
430         .iface = SNDRV_CTL_ELEM_IFACE_MIXER,
431         .name = "DRC Range",
432         .access = SNDRV_CTL_ELEM_ACCESS_READWRITE,
433         .info = tas_snd_drc_range_info,
434         .get = tas_snd_drc_range_get,
435         .put = tas_snd_drc_range_put,
436 };
437 
438 #define tas_snd_drc_switch_info         snd_ctl_boolean_mono_info
439 
440 static int tas_snd_drc_switch_get(struct snd_kcontrol *kcontrol,
441         struct snd_ctl_elem_value *ucontrol)
442 {
443         struct tas *tas = snd_kcontrol_chip(kcontrol);
444 
445         mutex_lock(&tas->mtx);
446         ucontrol->value.integer.value[0] = tas->drc_enabled;
447         mutex_unlock(&tas->mtx);
448         return 0;
449 }
450 
451 static int tas_snd_drc_switch_put(struct snd_kcontrol *kcontrol,
452         struct snd_ctl_elem_value *ucontrol)
453 {
454         struct tas *tas = snd_kcontrol_chip(kcontrol);
455 
456         mutex_lock(&tas->mtx);
457         if (tas->drc_enabled == ucontrol->value.integer.value[0]) {
458                 mutex_unlock(&tas->mtx);
459                 return 0;
460         }
461 
462         tas->drc_enabled = !!ucontrol->value.integer.value[0];
463         if (tas->hw_enabled)
464                 tas3004_set_drc(tas);
465         mutex_unlock(&tas->mtx);
466         return 1;
467 }
468 
469 static struct snd_kcontrol_new drc_switch_control = {
470         .iface = SNDRV_CTL_ELEM_IFACE_MIXER,
471         .name = "DRC Range Switch",
472         .access = SNDRV_CTL_ELEM_ACCESS_READWRITE,
473         .info = tas_snd_drc_switch_info,
474         .get = tas_snd_drc_switch_get,
475         .put = tas_snd_drc_switch_put,
476 };
477 
478 static int tas_snd_capture_source_info(struct snd_kcontrol *kcontrol,
479         struct snd_ctl_elem_info *uinfo)
480 {
481         static char *texts[] = { "Line-In", "Microphone" };
482 
483         uinfo->type = SNDRV_CTL_ELEM_TYPE_ENUMERATED;
484         uinfo->count = 1;
485         uinfo->value.enumerated.items = 2;
486         if (uinfo->value.enumerated.item > 1)
487                 uinfo->value.enumerated.item = 1;
488         strcpy(uinfo->value.enumerated.name, texts[uinfo->value.enumerated.item]);
489         return 0;
490 }
491 
492 static int tas_snd_capture_source_get(struct snd_kcontrol *kcontrol,
493         struct snd_ctl_elem_value *ucontrol)
494 {
495         struct tas *tas = snd_kcontrol_chip(kcontrol);
496 
497         mutex_lock(&tas->mtx);
498         ucontrol->value.enumerated.item[0] = !!(tas->acr & TAS_ACR_INPUT_B);
499         mutex_unlock(&tas->mtx);
500         return 0;
501 }
502 
503 static int tas_snd_capture_source_put(struct snd_kcontrol *kcontrol,
504         struct snd_ctl_elem_value *ucontrol)
505 {
506         struct tas *tas = snd_kcontrol_chip(kcontrol);
507         int oldacr;
508 
509         if (ucontrol->value.enumerated.item[0] > 1)
510                 return -EINVAL;
511         mutex_lock(&tas->mtx);
512         oldacr = tas->acr;
513 
514         /*
515          * Despite what the data sheet says in one place, the
516          * TAS_ACR_B_MONAUREAL bit forces mono output even when
517          * input A (line in) is selected.
518          */
519         tas->acr &= ~(TAS_ACR_INPUT_B | TAS_ACR_B_MONAUREAL);
520         if (ucontrol->value.enumerated.item[0])
521                 tas->acr |= TAS_ACR_INPUT_B | TAS_ACR_B_MONAUREAL |
522                       TAS_ACR_B_MON_SEL_RIGHT;
523         if (oldacr == tas->acr) {
524                 mutex_unlock(&tas->mtx);
525                 return 0;
526         }
527         if (tas->hw_enabled)
528                 tas_write_reg(tas, TAS_REG_ACR, 1, &tas->acr);
529         mutex_unlock(&tas->mtx);
530         return 1;
531 }
532 
533 static struct snd_kcontrol_new capture_source_control = {
534         .iface = SNDRV_CTL_ELEM_IFACE_MIXER,
535         /* If we name this 'Input Source', it properly shows up in
536          * alsamixer as a selection, * but it's shown under the
537          * 'Playback' category.
538          * If I name it 'Capture Source', it shows up in strange
539          * ways (two bools of which one can be selected at a
540          * time) but at least it's shown in the 'Capture'
541          * category.
542          * I was told that this was due to backward compatibility,
543          * but I don't understand then why the mangling is *not*
544          * done when I name it "Input Source".....
545          */
546         .name = "Capture Source",
547         .access = SNDRV_CTL_ELEM_ACCESS_READWRITE,
548         .info = tas_snd_capture_source_info,
549         .get = tas_snd_capture_source_get,
550         .put = tas_snd_capture_source_put,
551 };
552 
553 static int tas_snd_treble_info(struct snd_kcontrol *kcontrol,
554         struct snd_ctl_elem_info *uinfo)
555 {
556         uinfo->type = SNDRV_CTL_ELEM_TYPE_INTEGER;
557         uinfo->count = 1;
558         uinfo->value.integer.min = TAS3004_TREBLE_MIN;
559         uinfo->value.integer.max = TAS3004_TREBLE_MAX;
560         return 0;
561 }
562 
563 static int tas_snd_treble_get(struct snd_kcontrol *kcontrol,
564         struct snd_ctl_elem_value *ucontrol)
565 {
566         struct tas *tas = snd_kcontrol_chip(kcontrol);
567 
568         mutex_lock(&tas->mtx);
569         ucontrol->value.integer.value[0] = tas->treble;
570         mutex_unlock(&tas->mtx);
571         return 0;
572 }
573 
574 static int tas_snd_treble_put(struct snd_kcontrol *kcontrol,
575         struct snd_ctl_elem_value *ucontrol)
576 {
577         struct tas *tas = snd_kcontrol_chip(kcontrol);
578 
579         if (ucontrol->value.integer.value[0] < TAS3004_TREBLE_MIN ||
580             ucontrol->value.integer.value[0] > TAS3004_TREBLE_MAX)
581                 return -EINVAL;
582         mutex_lock(&tas->mtx);
583         if (tas->treble == ucontrol->value.integer.value[0]) {
584                 mutex_unlock(&tas->mtx);
585                 return 0;
586         }
587 
588         tas->treble = ucontrol->value.integer.value[0];
589         if (tas->hw_enabled)
590                 tas_set_treble(tas);
591         mutex_unlock(&tas->mtx);
592         return 1;
593 }
594 
595 static struct snd_kcontrol_new treble_control = {
596         .iface = SNDRV_CTL_ELEM_IFACE_MIXER,
597         .name = "Treble",
598         .access = SNDRV_CTL_ELEM_ACCESS_READWRITE,
599         .info = tas_snd_treble_info,
600         .get = tas_snd_treble_get,
601         .put = tas_snd_treble_put,
602 };
603 
604 static int tas_snd_bass_info(struct snd_kcontrol *kcontrol,
605         struct snd_ctl_elem_info *uinfo)
606 {
607         uinfo->type = SNDRV_CTL_ELEM_TYPE_INTEGER;
608         uinfo->count = 1;
609         uinfo->value.integer.min = TAS3004_BASS_MIN;
610         uinfo->value.integer.max = TAS3004_BASS_MAX;
611         return 0;
612 }
613 
614 static int tas_snd_bass_get(struct snd_kcontrol *kcontrol,
615         struct snd_ctl_elem_value *ucontrol)
616 {
617         struct tas *tas = snd_kcontrol_chip(kcontrol);
618 
619         mutex_lock(&tas->mtx);
620         ucontrol->value.integer.value[0] = tas->bass;
621         mutex_unlock(&tas->mtx);
622         return 0;
623 }
624 
625 static int tas_snd_bass_put(struct snd_kcontrol *kcontrol,
626         struct snd_ctl_elem_value *ucontrol)
627 {
628         struct tas *tas = snd_kcontrol_chip(kcontrol);
629 
630         if (ucontrol->value.integer.value[0] < TAS3004_BASS_MIN ||
631             ucontrol->value.integer.value[0] > TAS3004_BASS_MAX)
632                 return -EINVAL;
633         mutex_lock(&tas->mtx);
634         if (tas->bass == ucontrol->value.integer.value[0]) {
635                 mutex_unlock(&tas->mtx);
636                 return 0;
637         }
638 
639         tas->bass = ucontrol->value.integer.value[0];
640         if (tas->hw_enabled)
641                 tas_set_bass(tas);
642         mutex_unlock(&tas->mtx);
643         return 1;
644 }
645 
646 static struct snd_kcontrol_new bass_control = {
647         .iface = SNDRV_CTL_ELEM_IFACE_MIXER,
648         .name = "Bass",
649         .access = SNDRV_CTL_ELEM_ACCESS_READWRITE,
650         .info = tas_snd_bass_info,
651         .get = tas_snd_bass_get,
652         .put = tas_snd_bass_put,
653 };
654 
655 static struct transfer_info tas_transfers[] = {
656         {
657                 /* input */
658                 .formats = SNDRV_PCM_FMTBIT_S16_BE | SNDRV_PCM_FMTBIT_S24_BE,
659                 .rates = SNDRV_PCM_RATE_32000 | SNDRV_PCM_RATE_44100 | SNDRV_PCM_RATE_48000,
660                 .transfer_in = 1,
661         },
662         {
663                 /* output */
664                 .formats = SNDRV_PCM_FMTBIT_S16_BE | SNDRV_PCM_FMTBIT_S24_BE,
665                 .rates = SNDRV_PCM_RATE_32000 | SNDRV_PCM_RATE_44100 | SNDRV_PCM_RATE_48000,
666                 .transfer_in = 0,
667         },
668         {}
669 };
670 
671 static int tas_usable(struct codec_info_item *cii,
672                       struct transfer_info *ti,
673                       struct transfer_info *out)
674 {
675         return 1;
676 }
677 
678 static int tas_reset_init(struct tas *tas)
679 {
680         u8 tmp;
681 
682         tas->codec.gpio->methods->all_amps_off(tas->codec.gpio);
683         msleep(5);
684         tas->codec.gpio->methods->set_hw_reset(tas->codec.gpio, 0);
685         msleep(5);
686         tas->codec.gpio->methods->set_hw_reset(tas->codec.gpio, 1);
687         msleep(20);
688         tas->codec.gpio->methods->set_hw_reset(tas->codec.gpio, 0);
689         msleep(10);
690         tas->codec.gpio->methods->all_amps_restore(tas->codec.gpio);
691 
692         tmp = TAS_MCS_SCLK64 | TAS_MCS_SPORT_MODE_I2S | TAS_MCS_SPORT_WL_24BIT;
693         if (tas_write_reg(tas, TAS_REG_MCS, 1, &tmp))
694                 goto outerr;
695 
696         tas->acr |= TAS_ACR_ANALOG_PDOWN;
697         if (tas_write_reg(tas, TAS_REG_ACR, 1, &tas->acr))
698                 goto outerr;
699 
700         tmp = 0;
701         if (tas_write_reg(tas, TAS_REG_MCS2, 1, &tmp))
702                 goto outerr;
703 
704         tas3004_set_drc(tas);
705 
706         /* Set treble & bass to 0dB */
707         tas->treble = TAS3004_TREBLE_ZERO;
708         tas->bass = TAS3004_BASS_ZERO;
709         tas_set_treble(tas);
710         tas_set_bass(tas);
711 
712         tas->acr &= ~TAS_ACR_ANALOG_PDOWN;
713         if (tas_write_reg(tas, TAS_REG_ACR, 1, &tas->acr))
714                 goto outerr;
715 
716         return 0;
717  outerr:
718         return -ENODEV;
719 }
720 
721 static int tas_switch_clock(struct codec_info_item *cii, enum clock_switch clock)
722 {
723         struct tas *tas = cii->codec_data;
724 
725         switch(clock) {
726         case CLOCK_SWITCH_PREPARE_SLAVE:
727                 /* Clocks are going away, mute mute mute */
728                 tas->codec.gpio->methods->all_amps_off(tas->codec.gpio);
729                 tas->hw_enabled = 0;
730                 break;
731         case CLOCK_SWITCH_SLAVE:
732                 /* Clocks are back, re-init the codec */
733                 mutex_lock(&tas->mtx);
734                 tas_reset_init(tas);
735                 tas_set_volume(tas);
736                 tas_set_mixer(tas);
737                 tas->hw_enabled = 1;
738                 tas->codec.gpio->methods->all_amps_restore(tas->codec.gpio);
739                 mutex_unlock(&tas->mtx);
740                 break;
741         default:
742                 /* doesn't happen as of now */
743                 return -EINVAL;
744         }
745         return 0;
746 }
747 
748 #ifdef CONFIG_PM
749 /* we are controlled via i2c and assume that is always up
750  * If that wasn't the case, we'd have to suspend once
751  * our i2c device is suspended, and then take note of that! */
752 static int tas_suspend(struct tas *tas)
753 {
754         mutex_lock(&tas->mtx);
755         tas->hw_enabled = 0;
756         tas->acr |= TAS_ACR_ANALOG_PDOWN;
757         tas_write_reg(tas, TAS_REG_ACR, 1, &tas->acr);
758         mutex_unlock(&tas->mtx);
759         return 0;
760 }
761 
762 static int tas_resume(struct tas *tas)
763 {
764         /* reset codec */
765         mutex_lock(&tas->mtx);
766         tas_reset_init(tas);
767         tas_set_volume(tas);
768         tas_set_mixer(tas);
769         tas->hw_enabled = 1;
770         mutex_unlock(&tas->mtx);
771         return 0;
772 }
773 
774 static int _tas_suspend(struct codec_info_item *cii, pm_message_t state)
775 {
776         return tas_suspend(cii->codec_data);
777 }
778 
779 static int _tas_resume(struct codec_info_item *cii)
780 {
781         return tas_resume(cii->codec_data);
782 }
783 #else /* CONFIG_PM */
784 #define _tas_suspend    NULL
785 #define _tas_resume     NULL
786 #endif /* CONFIG_PM */
787 
788 static struct codec_info tas_codec_info = {
789         .transfers = tas_transfers,
790         /* in theory, we can drive it at 512 too...
791          * but so far the framework doesn't allow
792          * for that and I don't see much point in it. */
793         .sysclock_factor = 256,
794         /* same here, could be 32 for just one 16 bit format */
795         .bus_factor = 64,
796         .owner = THIS_MODULE,
797         .usable = tas_usable,
798         .switch_clock = tas_switch_clock,
799         .suspend = _tas_suspend,
800         .resume = _tas_resume,
801 };
802 
803 static int tas_init_codec(struct aoa_codec *codec)
804 {
805         struct tas *tas = codec_to_tas(codec);
806         int err;
807 
808         if (!tas->codec.gpio || !tas->codec.gpio->methods) {
809                 printk(KERN_ERR PFX "gpios not assigned!!\n");
810                 return -EINVAL;
811         }
812 
813         mutex_lock(&tas->mtx);
814         if (tas_reset_init(tas)) {
815                 printk(KERN_ERR PFX "tas failed to initialise\n");
816                 mutex_unlock(&tas->mtx);
817                 return -ENXIO;
818         }
819         tas->hw_enabled = 1;
820         mutex_unlock(&tas->mtx);
821 
822         if (tas->codec.soundbus_dev->attach_codec(tas->codec.soundbus_dev,
823                                                    aoa_get_card(),
824                                                    &tas_codec_info, tas)) {
825                 printk(KERN_ERR PFX "error attaching tas to soundbus\n");
826                 return -ENODEV;
827         }
828 
829         if (aoa_snd_device_new(SNDRV_DEV_LOWLEVEL, tas, &ops)) {
830                 printk(KERN_ERR PFX "failed to create tas snd device!\n");
831                 return -ENODEV;
832         }
833         err = aoa_snd_ctl_add(snd_ctl_new1(&volume_control, tas));
834         if (err)
835                 goto error;
836 
837         err = aoa_snd_ctl_add(snd_ctl_new1(&mute_control, tas));
838         if (err)
839                 goto error;
840 
841         err = aoa_snd_ctl_add(snd_ctl_new1(&pcm1_control, tas));
842         if (err)
843                 goto error;
844 
845         err = aoa_snd_ctl_add(snd_ctl_new1(&monitor_control, tas));
846         if (err)
847                 goto error;
848 
849         err = aoa_snd_ctl_add(snd_ctl_new1(&capture_source_control, tas));
850         if (err)
851                 goto error;
852 
853         err = aoa_snd_ctl_add(snd_ctl_new1(&drc_range_control, tas));
854         if (err)
855                 goto error;
856 
857         err = aoa_snd_ctl_add(snd_ctl_new1(&drc_switch_control, tas));
858         if (err)
859                 goto error;
860 
861         err = aoa_snd_ctl_add(snd_ctl_new1(&treble_control, tas));
862         if (err)
863                 goto error;
864 
865         err = aoa_snd_ctl_add(snd_ctl_new1(&bass_control, tas));
866         if (err)
867                 goto error;
868 
869         return 0;
870  error:
871         tas->codec.soundbus_dev->detach_codec(tas->codec.soundbus_dev, tas);
872         snd_device_free(aoa_get_card(), tas);
873         return err;
874 }
875 
876 static void tas_exit_codec(struct aoa_codec *codec)
877 {
878         struct tas *tas = codec_to_tas(codec);
879 
880         if (!tas->codec.soundbus_dev)
881                 return;
882         tas->codec.soundbus_dev->detach_codec(tas->codec.soundbus_dev, tas);
883 }
884 
885 
886 static int tas_i2c_probe(struct i2c_client *client,
887                          const struct i2c_device_id *id)
888 {
889         struct device_node *node = client->dev.of_node;
890         struct tas *tas;
891 
892         tas = kzalloc(sizeof(struct tas), GFP_KERNEL);
893 
894         if (!tas)
895                 return -ENOMEM;
896 
897         mutex_init(&tas->mtx);
898         tas->i2c = client;
899         i2c_set_clientdata(client, tas);
900 
901         /* seems that half is a saner default */
902         tas->drc_range = TAS3004_DRC_MAX / 2;
903 
904         strlcpy(tas->codec.name, "tas", MAX_CODEC_NAME_LEN);
905         tas->codec.owner = THIS_MODULE;
906         tas->codec.init = tas_init_codec;
907         tas->codec.exit = tas_exit_codec;
908         tas->codec.node = of_node_get(node);
909 
910         if (aoa_codec_register(&tas->codec)) {
911                 goto fail;
912         }
913         printk(KERN_DEBUG
914                "snd-aoa-codec-tas: tas found, addr 0x%02x on %s\n",
915                (unsigned int)client->addr, node->full_name);
916         return 0;
917  fail:
918         mutex_destroy(&tas->mtx);
919         kfree(tas);
920         return -EINVAL;
921 }
922 
923 static int tas_i2c_remove(struct i2c_client *client)
924 {
925         struct tas *tas = i2c_get_clientdata(client);
926         u8 tmp = TAS_ACR_ANALOG_PDOWN;
927 
928         aoa_codec_unregister(&tas->codec);
929         of_node_put(tas->codec.node);
930 
931         /* power down codec chip */
932         tas_write_reg(tas, TAS_REG_ACR, 1, &tmp);
933 
934         mutex_destroy(&tas->mtx);
935         kfree(tas);
936         return 0;
937 }
938 
939 static const struct i2c_device_id tas_i2c_id[] = {
940         { "MAC,tas3004", 0 },
941         { }
942 };
943 MODULE_DEVICE_TABLE(i2c,tas_i2c_id);
944 
945 static struct i2c_driver tas_driver = {
946         .driver = {
947                 .name = "aoa_codec_tas",
948                 .owner = THIS_MODULE,
949         },
950         .probe = tas_i2c_probe,
951         .remove = tas_i2c_remove,
952         .id_table = tas_i2c_id,
953 };
954 
955 module_i2c_driver(tas_driver);
956 

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