xref: /openbmc/linux/sound/aoa/codecs/tas.c (revision c894ec01)
1 // SPDX-License-Identifier: GPL-2.0-only
2 /*
3  * Apple Onboard Audio driver for tas codec
4  *
5  * Copyright 2006 Johannes Berg <johannes@sipsolutions.net>
6  *
7  * Open questions:
8  *  - How to distinguish between 3004 and versions?
9  *
10  * FIXMEs:
11  *  - This codec driver doesn't honour the 'connected'
12  *    property of the aoa_codec struct, hence if
13  *    it is used in machines where not everything is
14  *    connected it will display wrong mixer elements.
15  *  - Driver assumes that the microphone is always
16  *    monaureal and connected to the right channel of
17  *    the input. This should also be a codec-dependent
18  *    flag, maybe the codec should have 3 different
19  *    bits for the three different possibilities how
20  *    it can be hooked up...
21  *    But as long as I don't see any hardware hooked
22  *    up that way...
23  *  - As Apple notes in their code, the tas3004 seems
24  *    to delay the right channel by one sample. You can
25  *    see this when for example recording stereo in
26  *    audacity, or recording the tas output via cable
27  *    on another machine (use a sinus generator or so).
28  *    I tried programming the BiQuads but couldn't
29  *    make the delay work, maybe someone can read the
30  *    datasheet and fix it. The relevant Apple comment
31  *    is in AppleTAS3004Audio.cpp lines 1637 ff. Note
32  *    that their comment describing how they program
33  *    the filters sucks...
34  *
35  * Other things:
36  *  - this should actually register *two* aoa_codec
37  *    structs since it has two inputs. Then it must
38  *    use the prepare callback to forbid running the
39  *    secondary output on a different clock.
40  *    Also, whatever bus knows how to do this must
41  *    provide two soundbus_dev devices and the fabric
42  *    must be able to link them correctly.
43  *
44  *    I don't even know if Apple ever uses the second
45  *    port on the tas3004 though, I don't think their
46  *    i2s controllers can even do it. OTOH, they all
47  *    derive the clocks from common clocks, so it
48  *    might just be possible. The framework allows the
49  *    codec to refine the transfer_info items in the
50  *    usable callback, so we can simply remove the
51  *    rates the second instance is not using when it
52  *    actually is in use.
53  *    Maybe we'll need to make the sound busses have
54  *    a 'clock group id' value so the codec can
55  *    determine if the two outputs can be driven at
56  *    the same time. But that is likely overkill, up
57  *    to the fabric to not link them up incorrectly,
58  *    and up to the hardware designer to not wire
59  *    them up in some weird unusable way.
60  */
61 #include <linux/i2c.h>
62 #include <asm/pmac_low_i2c.h>
63 #include <asm/prom.h>
64 #include <linux/delay.h>
65 #include <linux/module.h>
66 #include <linux/mutex.h>
67 #include <linux/slab.h>
68 
69 MODULE_AUTHOR("Johannes Berg <johannes@sipsolutions.net>");
70 MODULE_LICENSE("GPL");
71 MODULE_DESCRIPTION("tas codec driver for snd-aoa");
72 
73 #include "tas.h"
74 #include "tas-gain-table.h"
75 #include "tas-basstreble.h"
76 #include "../aoa.h"
77 #include "../soundbus/soundbus.h"
78 
79 #define PFX "snd-aoa-codec-tas: "
80 
81 
82 struct tas {
83 	struct aoa_codec	codec;
84 	struct i2c_client	*i2c;
85 	u32			mute_l:1, mute_r:1 ,
86 				controls_created:1 ,
87 				drc_enabled:1,
88 				hw_enabled:1;
89 	u8			cached_volume_l, cached_volume_r;
90 	u8			mixer_l[3], mixer_r[3];
91 	u8			bass, treble;
92 	u8			acr;
93 	int			drc_range;
94 	/* protects hardware access against concurrency from
95 	 * userspace when hitting controls and during
96 	 * codec init/suspend/resume */
97 	struct mutex		mtx;
98 };
99 
100 static int tas_reset_init(struct tas *tas);
101 
codec_to_tas(struct aoa_codec * codec)102 static struct tas *codec_to_tas(struct aoa_codec *codec)
103 {
104 	return container_of(codec, struct tas, codec);
105 }
106 
tas_write_reg(struct tas * tas,u8 reg,u8 len,u8 * data)107 static inline int tas_write_reg(struct tas *tas, u8 reg, u8 len, u8 *data)
108 {
109 	if (len == 1)
110 		return i2c_smbus_write_byte_data(tas->i2c, reg, *data);
111 	else
112 		return i2c_smbus_write_i2c_block_data(tas->i2c, reg, len, data);
113 }
114 
tas3004_set_drc(struct tas * tas)115 static void tas3004_set_drc(struct tas *tas)
116 {
117 	unsigned char val[6];
118 
119 	if (tas->drc_enabled)
120 		val[0] = 0x50; /* 3:1 above threshold */
121 	else
122 		val[0] = 0x51; /* disabled */
123 	val[1] = 0x02; /* 1:1 below threshold */
124 	if (tas->drc_range > 0xef)
125 		val[2] = 0xef;
126 	else if (tas->drc_range < 0)
127 		val[2] = 0x00;
128 	else
129 		val[2] = tas->drc_range;
130 	val[3] = 0xb0;
131 	val[4] = 0x60;
132 	val[5] = 0xa0;
133 
134 	tas_write_reg(tas, TAS_REG_DRC, 6, val);
135 }
136 
tas_set_treble(struct tas * tas)137 static void tas_set_treble(struct tas *tas)
138 {
139 	u8 tmp;
140 
141 	tmp = tas3004_treble(tas->treble);
142 	tas_write_reg(tas, TAS_REG_TREBLE, 1, &tmp);
143 }
144 
tas_set_bass(struct tas * tas)145 static void tas_set_bass(struct tas *tas)
146 {
147 	u8 tmp;
148 
149 	tmp = tas3004_bass(tas->bass);
150 	tas_write_reg(tas, TAS_REG_BASS, 1, &tmp);
151 }
152 
tas_set_volume(struct tas * tas)153 static void tas_set_volume(struct tas *tas)
154 {
155 	u8 block[6];
156 	int tmp;
157 	u8 left, right;
158 
159 	left = tas->cached_volume_l;
160 	right = tas->cached_volume_r;
161 
162 	if (left > 177) left = 177;
163 	if (right > 177) right = 177;
164 
165 	if (tas->mute_l) left = 0;
166 	if (tas->mute_r) right = 0;
167 
168 	/* analysing the volume and mixer tables shows
169 	 * that they are similar enough when we shift
170 	 * the mixer table down by 4 bits. The error
171 	 * is miniscule, in just one item the error
172 	 * is 1, at a value of 0x07f17b (mixer table
173 	 * value is 0x07f17a) */
174 	tmp = tas_gaintable[left];
175 	block[0] = tmp>>20;
176 	block[1] = tmp>>12;
177 	block[2] = tmp>>4;
178 	tmp = tas_gaintable[right];
179 	block[3] = tmp>>20;
180 	block[4] = tmp>>12;
181 	block[5] = tmp>>4;
182 	tas_write_reg(tas, TAS_REG_VOL, 6, block);
183 }
184 
tas_set_mixer(struct tas * tas)185 static void tas_set_mixer(struct tas *tas)
186 {
187 	u8 block[9];
188 	int tmp, i;
189 	u8 val;
190 
191 	for (i=0;i<3;i++) {
192 		val = tas->mixer_l[i];
193 		if (val > 177) val = 177;
194 		tmp = tas_gaintable[val];
195 		block[3*i+0] = tmp>>16;
196 		block[3*i+1] = tmp>>8;
197 		block[3*i+2] = tmp;
198 	}
199 	tas_write_reg(tas, TAS_REG_LMIX, 9, block);
200 
201 	for (i=0;i<3;i++) {
202 		val = tas->mixer_r[i];
203 		if (val > 177) val = 177;
204 		tmp = tas_gaintable[val];
205 		block[3*i+0] = tmp>>16;
206 		block[3*i+1] = tmp>>8;
207 		block[3*i+2] = tmp;
208 	}
209 	tas_write_reg(tas, TAS_REG_RMIX, 9, block);
210 }
211 
212 /* alsa stuff */
213 
tas_dev_register(struct snd_device * dev)214 static int tas_dev_register(struct snd_device *dev)
215 {
216 	return 0;
217 }
218 
219 static const struct snd_device_ops ops = {
220 	.dev_register = tas_dev_register,
221 };
222 
tas_snd_vol_info(struct snd_kcontrol * kcontrol,struct snd_ctl_elem_info * uinfo)223 static int tas_snd_vol_info(struct snd_kcontrol *kcontrol,
224 	struct snd_ctl_elem_info *uinfo)
225 {
226 	uinfo->type = SNDRV_CTL_ELEM_TYPE_INTEGER;
227 	uinfo->count = 2;
228 	uinfo->value.integer.min = 0;
229 	uinfo->value.integer.max = 177;
230 	return 0;
231 }
232 
tas_snd_vol_get(struct snd_kcontrol * kcontrol,struct snd_ctl_elem_value * ucontrol)233 static int tas_snd_vol_get(struct snd_kcontrol *kcontrol,
234 	struct snd_ctl_elem_value *ucontrol)
235 {
236 	struct tas *tas = snd_kcontrol_chip(kcontrol);
237 
238 	mutex_lock(&tas->mtx);
239 	ucontrol->value.integer.value[0] = tas->cached_volume_l;
240 	ucontrol->value.integer.value[1] = tas->cached_volume_r;
241 	mutex_unlock(&tas->mtx);
242 	return 0;
243 }
244 
tas_snd_vol_put(struct snd_kcontrol * kcontrol,struct snd_ctl_elem_value * ucontrol)245 static int tas_snd_vol_put(struct snd_kcontrol *kcontrol,
246 	struct snd_ctl_elem_value *ucontrol)
247 {
248 	struct tas *tas = snd_kcontrol_chip(kcontrol);
249 
250 	if (ucontrol->value.integer.value[0] < 0 ||
251 	    ucontrol->value.integer.value[0] > 177)
252 		return -EINVAL;
253 	if (ucontrol->value.integer.value[1] < 0 ||
254 	    ucontrol->value.integer.value[1] > 177)
255 		return -EINVAL;
256 
257 	mutex_lock(&tas->mtx);
258 	if (tas->cached_volume_l == ucontrol->value.integer.value[0]
259 	 && tas->cached_volume_r == ucontrol->value.integer.value[1]) {
260 		mutex_unlock(&tas->mtx);
261 		return 0;
262 	}
263 
264 	tas->cached_volume_l = ucontrol->value.integer.value[0];
265 	tas->cached_volume_r = ucontrol->value.integer.value[1];
266 	if (tas->hw_enabled)
267 		tas_set_volume(tas);
268 	mutex_unlock(&tas->mtx);
269 	return 1;
270 }
271 
272 static const struct snd_kcontrol_new volume_control = {
273 	.iface = SNDRV_CTL_ELEM_IFACE_MIXER,
274 	.name = "Master Playback Volume",
275 	.access = SNDRV_CTL_ELEM_ACCESS_READWRITE,
276 	.info = tas_snd_vol_info,
277 	.get = tas_snd_vol_get,
278 	.put = tas_snd_vol_put,
279 };
280 
281 #define tas_snd_mute_info	snd_ctl_boolean_stereo_info
282 
tas_snd_mute_get(struct snd_kcontrol * kcontrol,struct snd_ctl_elem_value * ucontrol)283 static int tas_snd_mute_get(struct snd_kcontrol *kcontrol,
284 	struct snd_ctl_elem_value *ucontrol)
285 {
286 	struct tas *tas = snd_kcontrol_chip(kcontrol);
287 
288 	mutex_lock(&tas->mtx);
289 	ucontrol->value.integer.value[0] = !tas->mute_l;
290 	ucontrol->value.integer.value[1] = !tas->mute_r;
291 	mutex_unlock(&tas->mtx);
292 	return 0;
293 }
294 
tas_snd_mute_put(struct snd_kcontrol * kcontrol,struct snd_ctl_elem_value * ucontrol)295 static int tas_snd_mute_put(struct snd_kcontrol *kcontrol,
296 	struct snd_ctl_elem_value *ucontrol)
297 {
298 	struct tas *tas = snd_kcontrol_chip(kcontrol);
299 
300 	mutex_lock(&tas->mtx);
301 	if (tas->mute_l == !ucontrol->value.integer.value[0]
302 	 && tas->mute_r == !ucontrol->value.integer.value[1]) {
303 		mutex_unlock(&tas->mtx);
304 		return 0;
305 	}
306 
307 	tas->mute_l = !ucontrol->value.integer.value[0];
308 	tas->mute_r = !ucontrol->value.integer.value[1];
309 	if (tas->hw_enabled)
310 		tas_set_volume(tas);
311 	mutex_unlock(&tas->mtx);
312 	return 1;
313 }
314 
315 static const struct snd_kcontrol_new mute_control = {
316 	.iface = SNDRV_CTL_ELEM_IFACE_MIXER,
317 	.name = "Master Playback Switch",
318 	.access = SNDRV_CTL_ELEM_ACCESS_READWRITE,
319 	.info = tas_snd_mute_info,
320 	.get = tas_snd_mute_get,
321 	.put = tas_snd_mute_put,
322 };
323 
tas_snd_mixer_info(struct snd_kcontrol * kcontrol,struct snd_ctl_elem_info * uinfo)324 static int tas_snd_mixer_info(struct snd_kcontrol *kcontrol,
325 	struct snd_ctl_elem_info *uinfo)
326 {
327 	uinfo->type = SNDRV_CTL_ELEM_TYPE_INTEGER;
328 	uinfo->count = 2;
329 	uinfo->value.integer.min = 0;
330 	uinfo->value.integer.max = 177;
331 	return 0;
332 }
333 
tas_snd_mixer_get(struct snd_kcontrol * kcontrol,struct snd_ctl_elem_value * ucontrol)334 static int tas_snd_mixer_get(struct snd_kcontrol *kcontrol,
335 	struct snd_ctl_elem_value *ucontrol)
336 {
337 	struct tas *tas = snd_kcontrol_chip(kcontrol);
338 	int idx = kcontrol->private_value;
339 
340 	mutex_lock(&tas->mtx);
341 	ucontrol->value.integer.value[0] = tas->mixer_l[idx];
342 	ucontrol->value.integer.value[1] = tas->mixer_r[idx];
343 	mutex_unlock(&tas->mtx);
344 
345 	return 0;
346 }
347 
tas_snd_mixer_put(struct snd_kcontrol * kcontrol,struct snd_ctl_elem_value * ucontrol)348 static int tas_snd_mixer_put(struct snd_kcontrol *kcontrol,
349 	struct snd_ctl_elem_value *ucontrol)
350 {
351 	struct tas *tas = snd_kcontrol_chip(kcontrol);
352 	int idx = kcontrol->private_value;
353 
354 	mutex_lock(&tas->mtx);
355 	if (tas->mixer_l[idx] == ucontrol->value.integer.value[0]
356 	 && tas->mixer_r[idx] == ucontrol->value.integer.value[1]) {
357 		mutex_unlock(&tas->mtx);
358 		return 0;
359 	}
360 
361 	tas->mixer_l[idx] = ucontrol->value.integer.value[0];
362 	tas->mixer_r[idx] = ucontrol->value.integer.value[1];
363 
364 	if (tas->hw_enabled)
365 		tas_set_mixer(tas);
366 	mutex_unlock(&tas->mtx);
367 	return 1;
368 }
369 
370 #define MIXER_CONTROL(n,descr,idx)			\
371 static const struct snd_kcontrol_new n##_control = {	\
372 	.iface = SNDRV_CTL_ELEM_IFACE_MIXER,		\
373 	.name = descr " Playback Volume",		\
374 	.access = SNDRV_CTL_ELEM_ACCESS_READWRITE,	\
375 	.info = tas_snd_mixer_info,			\
376 	.get = tas_snd_mixer_get,			\
377 	.put = tas_snd_mixer_put,			\
378 	.private_value = idx,				\
379 }
380 
381 MIXER_CONTROL(pcm1, "PCM", 0);
382 MIXER_CONTROL(monitor, "Monitor", 2);
383 
tas_snd_drc_range_info(struct snd_kcontrol * kcontrol,struct snd_ctl_elem_info * uinfo)384 static int tas_snd_drc_range_info(struct snd_kcontrol *kcontrol,
385 	struct snd_ctl_elem_info *uinfo)
386 {
387 	uinfo->type = SNDRV_CTL_ELEM_TYPE_INTEGER;
388 	uinfo->count = 1;
389 	uinfo->value.integer.min = 0;
390 	uinfo->value.integer.max = TAS3004_DRC_MAX;
391 	return 0;
392 }
393 
tas_snd_drc_range_get(struct snd_kcontrol * kcontrol,struct snd_ctl_elem_value * ucontrol)394 static int tas_snd_drc_range_get(struct snd_kcontrol *kcontrol,
395 	struct snd_ctl_elem_value *ucontrol)
396 {
397 	struct tas *tas = snd_kcontrol_chip(kcontrol);
398 
399 	mutex_lock(&tas->mtx);
400 	ucontrol->value.integer.value[0] = tas->drc_range;
401 	mutex_unlock(&tas->mtx);
402 	return 0;
403 }
404 
tas_snd_drc_range_put(struct snd_kcontrol * kcontrol,struct snd_ctl_elem_value * ucontrol)405 static int tas_snd_drc_range_put(struct snd_kcontrol *kcontrol,
406 	struct snd_ctl_elem_value *ucontrol)
407 {
408 	struct tas *tas = snd_kcontrol_chip(kcontrol);
409 
410 	if (ucontrol->value.integer.value[0] < 0 ||
411 	    ucontrol->value.integer.value[0] > TAS3004_DRC_MAX)
412 		return -EINVAL;
413 
414 	mutex_lock(&tas->mtx);
415 	if (tas->drc_range == ucontrol->value.integer.value[0]) {
416 		mutex_unlock(&tas->mtx);
417 		return 0;
418 	}
419 
420 	tas->drc_range = ucontrol->value.integer.value[0];
421 	if (tas->hw_enabled)
422 		tas3004_set_drc(tas);
423 	mutex_unlock(&tas->mtx);
424 	return 1;
425 }
426 
427 static const struct snd_kcontrol_new drc_range_control = {
428 	.iface = SNDRV_CTL_ELEM_IFACE_MIXER,
429 	.name = "DRC Range",
430 	.access = SNDRV_CTL_ELEM_ACCESS_READWRITE,
431 	.info = tas_snd_drc_range_info,
432 	.get = tas_snd_drc_range_get,
433 	.put = tas_snd_drc_range_put,
434 };
435 
436 #define tas_snd_drc_switch_info		snd_ctl_boolean_mono_info
437 
tas_snd_drc_switch_get(struct snd_kcontrol * kcontrol,struct snd_ctl_elem_value * ucontrol)438 static int tas_snd_drc_switch_get(struct snd_kcontrol *kcontrol,
439 	struct snd_ctl_elem_value *ucontrol)
440 {
441 	struct tas *tas = snd_kcontrol_chip(kcontrol);
442 
443 	mutex_lock(&tas->mtx);
444 	ucontrol->value.integer.value[0] = tas->drc_enabled;
445 	mutex_unlock(&tas->mtx);
446 	return 0;
447 }
448 
tas_snd_drc_switch_put(struct snd_kcontrol * kcontrol,struct snd_ctl_elem_value * ucontrol)449 static int tas_snd_drc_switch_put(struct snd_kcontrol *kcontrol,
450 	struct snd_ctl_elem_value *ucontrol)
451 {
452 	struct tas *tas = snd_kcontrol_chip(kcontrol);
453 
454 	mutex_lock(&tas->mtx);
455 	if (tas->drc_enabled == ucontrol->value.integer.value[0]) {
456 		mutex_unlock(&tas->mtx);
457 		return 0;
458 	}
459 
460 	tas->drc_enabled = !!ucontrol->value.integer.value[0];
461 	if (tas->hw_enabled)
462 		tas3004_set_drc(tas);
463 	mutex_unlock(&tas->mtx);
464 	return 1;
465 }
466 
467 static const struct snd_kcontrol_new drc_switch_control = {
468 	.iface = SNDRV_CTL_ELEM_IFACE_MIXER,
469 	.name = "DRC Range Switch",
470 	.access = SNDRV_CTL_ELEM_ACCESS_READWRITE,
471 	.info = tas_snd_drc_switch_info,
472 	.get = tas_snd_drc_switch_get,
473 	.put = tas_snd_drc_switch_put,
474 };
475 
tas_snd_capture_source_info(struct snd_kcontrol * kcontrol,struct snd_ctl_elem_info * uinfo)476 static int tas_snd_capture_source_info(struct snd_kcontrol *kcontrol,
477 	struct snd_ctl_elem_info *uinfo)
478 {
479 	static const char * const texts[] = { "Line-In", "Microphone" };
480 
481 	return snd_ctl_enum_info(uinfo, 1, 2, texts);
482 }
483 
tas_snd_capture_source_get(struct snd_kcontrol * kcontrol,struct snd_ctl_elem_value * ucontrol)484 static int tas_snd_capture_source_get(struct snd_kcontrol *kcontrol,
485 	struct snd_ctl_elem_value *ucontrol)
486 {
487 	struct tas *tas = snd_kcontrol_chip(kcontrol);
488 
489 	mutex_lock(&tas->mtx);
490 	ucontrol->value.enumerated.item[0] = !!(tas->acr & TAS_ACR_INPUT_B);
491 	mutex_unlock(&tas->mtx);
492 	return 0;
493 }
494 
tas_snd_capture_source_put(struct snd_kcontrol * kcontrol,struct snd_ctl_elem_value * ucontrol)495 static int tas_snd_capture_source_put(struct snd_kcontrol *kcontrol,
496 	struct snd_ctl_elem_value *ucontrol)
497 {
498 	struct tas *tas = snd_kcontrol_chip(kcontrol);
499 	int oldacr;
500 
501 	if (ucontrol->value.enumerated.item[0] > 1)
502 		return -EINVAL;
503 	mutex_lock(&tas->mtx);
504 	oldacr = tas->acr;
505 
506 	/*
507 	 * Despite what the data sheet says in one place, the
508 	 * TAS_ACR_B_MONAUREAL bit forces mono output even when
509 	 * input A (line in) is selected.
510 	 */
511 	tas->acr &= ~(TAS_ACR_INPUT_B | TAS_ACR_B_MONAUREAL);
512 	if (ucontrol->value.enumerated.item[0])
513 		tas->acr |= TAS_ACR_INPUT_B | TAS_ACR_B_MONAUREAL |
514 		      TAS_ACR_B_MON_SEL_RIGHT;
515 	if (oldacr == tas->acr) {
516 		mutex_unlock(&tas->mtx);
517 		return 0;
518 	}
519 	if (tas->hw_enabled)
520 		tas_write_reg(tas, TAS_REG_ACR, 1, &tas->acr);
521 	mutex_unlock(&tas->mtx);
522 	return 1;
523 }
524 
525 static const struct snd_kcontrol_new capture_source_control = {
526 	.iface = SNDRV_CTL_ELEM_IFACE_MIXER,
527 	/* If we name this 'Input Source', it properly shows up in
528 	 * alsamixer as a selection, * but it's shown under the
529 	 * 'Playback' category.
530 	 * If I name it 'Capture Source', it shows up in strange
531 	 * ways (two bools of which one can be selected at a
532 	 * time) but at least it's shown in the 'Capture'
533 	 * category.
534 	 * I was told that this was due to backward compatibility,
535 	 * but I don't understand then why the mangling is *not*
536 	 * done when I name it "Input Source".....
537 	 */
538 	.name = "Capture Source",
539 	.access = SNDRV_CTL_ELEM_ACCESS_READWRITE,
540 	.info = tas_snd_capture_source_info,
541 	.get = tas_snd_capture_source_get,
542 	.put = tas_snd_capture_source_put,
543 };
544 
tas_snd_treble_info(struct snd_kcontrol * kcontrol,struct snd_ctl_elem_info * uinfo)545 static int tas_snd_treble_info(struct snd_kcontrol *kcontrol,
546 	struct snd_ctl_elem_info *uinfo)
547 {
548 	uinfo->type = SNDRV_CTL_ELEM_TYPE_INTEGER;
549 	uinfo->count = 1;
550 	uinfo->value.integer.min = TAS3004_TREBLE_MIN;
551 	uinfo->value.integer.max = TAS3004_TREBLE_MAX;
552 	return 0;
553 }
554 
tas_snd_treble_get(struct snd_kcontrol * kcontrol,struct snd_ctl_elem_value * ucontrol)555 static int tas_snd_treble_get(struct snd_kcontrol *kcontrol,
556 	struct snd_ctl_elem_value *ucontrol)
557 {
558 	struct tas *tas = snd_kcontrol_chip(kcontrol);
559 
560 	mutex_lock(&tas->mtx);
561 	ucontrol->value.integer.value[0] = tas->treble;
562 	mutex_unlock(&tas->mtx);
563 	return 0;
564 }
565 
tas_snd_treble_put(struct snd_kcontrol * kcontrol,struct snd_ctl_elem_value * ucontrol)566 static int tas_snd_treble_put(struct snd_kcontrol *kcontrol,
567 	struct snd_ctl_elem_value *ucontrol)
568 {
569 	struct tas *tas = snd_kcontrol_chip(kcontrol);
570 
571 	if (ucontrol->value.integer.value[0] < TAS3004_TREBLE_MIN ||
572 	    ucontrol->value.integer.value[0] > TAS3004_TREBLE_MAX)
573 		return -EINVAL;
574 	mutex_lock(&tas->mtx);
575 	if (tas->treble == ucontrol->value.integer.value[0]) {
576 		mutex_unlock(&tas->mtx);
577 		return 0;
578 	}
579 
580 	tas->treble = ucontrol->value.integer.value[0];
581 	if (tas->hw_enabled)
582 		tas_set_treble(tas);
583 	mutex_unlock(&tas->mtx);
584 	return 1;
585 }
586 
587 static const struct snd_kcontrol_new treble_control = {
588 	.iface = SNDRV_CTL_ELEM_IFACE_MIXER,
589 	.name = "Treble",
590 	.access = SNDRV_CTL_ELEM_ACCESS_READWRITE,
591 	.info = tas_snd_treble_info,
592 	.get = tas_snd_treble_get,
593 	.put = tas_snd_treble_put,
594 };
595 
tas_snd_bass_info(struct snd_kcontrol * kcontrol,struct snd_ctl_elem_info * uinfo)596 static int tas_snd_bass_info(struct snd_kcontrol *kcontrol,
597 	struct snd_ctl_elem_info *uinfo)
598 {
599 	uinfo->type = SNDRV_CTL_ELEM_TYPE_INTEGER;
600 	uinfo->count = 1;
601 	uinfo->value.integer.min = TAS3004_BASS_MIN;
602 	uinfo->value.integer.max = TAS3004_BASS_MAX;
603 	return 0;
604 }
605 
tas_snd_bass_get(struct snd_kcontrol * kcontrol,struct snd_ctl_elem_value * ucontrol)606 static int tas_snd_bass_get(struct snd_kcontrol *kcontrol,
607 	struct snd_ctl_elem_value *ucontrol)
608 {
609 	struct tas *tas = snd_kcontrol_chip(kcontrol);
610 
611 	mutex_lock(&tas->mtx);
612 	ucontrol->value.integer.value[0] = tas->bass;
613 	mutex_unlock(&tas->mtx);
614 	return 0;
615 }
616 
tas_snd_bass_put(struct snd_kcontrol * kcontrol,struct snd_ctl_elem_value * ucontrol)617 static int tas_snd_bass_put(struct snd_kcontrol *kcontrol,
618 	struct snd_ctl_elem_value *ucontrol)
619 {
620 	struct tas *tas = snd_kcontrol_chip(kcontrol);
621 
622 	if (ucontrol->value.integer.value[0] < TAS3004_BASS_MIN ||
623 	    ucontrol->value.integer.value[0] > TAS3004_BASS_MAX)
624 		return -EINVAL;
625 	mutex_lock(&tas->mtx);
626 	if (tas->bass == ucontrol->value.integer.value[0]) {
627 		mutex_unlock(&tas->mtx);
628 		return 0;
629 	}
630 
631 	tas->bass = ucontrol->value.integer.value[0];
632 	if (tas->hw_enabled)
633 		tas_set_bass(tas);
634 	mutex_unlock(&tas->mtx);
635 	return 1;
636 }
637 
638 static const struct snd_kcontrol_new bass_control = {
639 	.iface = SNDRV_CTL_ELEM_IFACE_MIXER,
640 	.name = "Bass",
641 	.access = SNDRV_CTL_ELEM_ACCESS_READWRITE,
642 	.info = tas_snd_bass_info,
643 	.get = tas_snd_bass_get,
644 	.put = tas_snd_bass_put,
645 };
646 
647 static struct transfer_info tas_transfers[] = {
648 	{
649 		/* input */
650 		.formats = SNDRV_PCM_FMTBIT_S16_BE | SNDRV_PCM_FMTBIT_S24_BE,
651 		.rates = SNDRV_PCM_RATE_32000 | SNDRV_PCM_RATE_44100 | SNDRV_PCM_RATE_48000,
652 		.transfer_in = 1,
653 	},
654 	{
655 		/* output */
656 		.formats = SNDRV_PCM_FMTBIT_S16_BE | SNDRV_PCM_FMTBIT_S24_BE,
657 		.rates = SNDRV_PCM_RATE_32000 | SNDRV_PCM_RATE_44100 | SNDRV_PCM_RATE_48000,
658 		.transfer_in = 0,
659 	},
660 	{}
661 };
662 
tas_usable(struct codec_info_item * cii,struct transfer_info * ti,struct transfer_info * out)663 static int tas_usable(struct codec_info_item *cii,
664 		      struct transfer_info *ti,
665 		      struct transfer_info *out)
666 {
667 	return 1;
668 }
669 
tas_reset_init(struct tas * tas)670 static int tas_reset_init(struct tas *tas)
671 {
672 	u8 tmp;
673 
674 	tas->codec.gpio->methods->all_amps_off(tas->codec.gpio);
675 	msleep(5);
676 	tas->codec.gpio->methods->set_hw_reset(tas->codec.gpio, 0);
677 	msleep(5);
678 	tas->codec.gpio->methods->set_hw_reset(tas->codec.gpio, 1);
679 	msleep(20);
680 	tas->codec.gpio->methods->set_hw_reset(tas->codec.gpio, 0);
681 	msleep(10);
682 	tas->codec.gpio->methods->all_amps_restore(tas->codec.gpio);
683 
684 	tmp = TAS_MCS_SCLK64 | TAS_MCS_SPORT_MODE_I2S | TAS_MCS_SPORT_WL_24BIT;
685 	if (tas_write_reg(tas, TAS_REG_MCS, 1, &tmp))
686 		goto outerr;
687 
688 	tas->acr |= TAS_ACR_ANALOG_PDOWN;
689 	if (tas_write_reg(tas, TAS_REG_ACR, 1, &tas->acr))
690 		goto outerr;
691 
692 	tmp = 0;
693 	if (tas_write_reg(tas, TAS_REG_MCS2, 1, &tmp))
694 		goto outerr;
695 
696 	tas3004_set_drc(tas);
697 
698 	/* Set treble & bass to 0dB */
699 	tas->treble = TAS3004_TREBLE_ZERO;
700 	tas->bass = TAS3004_BASS_ZERO;
701 	tas_set_treble(tas);
702 	tas_set_bass(tas);
703 
704 	tas->acr &= ~TAS_ACR_ANALOG_PDOWN;
705 	if (tas_write_reg(tas, TAS_REG_ACR, 1, &tas->acr))
706 		goto outerr;
707 
708 	return 0;
709  outerr:
710 	return -ENODEV;
711 }
712 
tas_switch_clock(struct codec_info_item * cii,enum clock_switch clock)713 static int tas_switch_clock(struct codec_info_item *cii, enum clock_switch clock)
714 {
715 	struct tas *tas = cii->codec_data;
716 
717 	switch(clock) {
718 	case CLOCK_SWITCH_PREPARE_SLAVE:
719 		/* Clocks are going away, mute mute mute */
720 		tas->codec.gpio->methods->all_amps_off(tas->codec.gpio);
721 		tas->hw_enabled = 0;
722 		break;
723 	case CLOCK_SWITCH_SLAVE:
724 		/* Clocks are back, re-init the codec */
725 		mutex_lock(&tas->mtx);
726 		tas_reset_init(tas);
727 		tas_set_volume(tas);
728 		tas_set_mixer(tas);
729 		tas->hw_enabled = 1;
730 		tas->codec.gpio->methods->all_amps_restore(tas->codec.gpio);
731 		mutex_unlock(&tas->mtx);
732 		break;
733 	default:
734 		/* doesn't happen as of now */
735 		return -EINVAL;
736 	}
737 	return 0;
738 }
739 
740 #ifdef CONFIG_PM
741 /* we are controlled via i2c and assume that is always up
742  * If that wasn't the case, we'd have to suspend once
743  * our i2c device is suspended, and then take note of that! */
tas_suspend(struct tas * tas)744 static int tas_suspend(struct tas *tas)
745 {
746 	mutex_lock(&tas->mtx);
747 	tas->hw_enabled = 0;
748 	tas->acr |= TAS_ACR_ANALOG_PDOWN;
749 	tas_write_reg(tas, TAS_REG_ACR, 1, &tas->acr);
750 	mutex_unlock(&tas->mtx);
751 	return 0;
752 }
753 
tas_resume(struct tas * tas)754 static int tas_resume(struct tas *tas)
755 {
756 	/* reset codec */
757 	mutex_lock(&tas->mtx);
758 	tas_reset_init(tas);
759 	tas_set_volume(tas);
760 	tas_set_mixer(tas);
761 	tas->hw_enabled = 1;
762 	mutex_unlock(&tas->mtx);
763 	return 0;
764 }
765 
_tas_suspend(struct codec_info_item * cii,pm_message_t state)766 static int _tas_suspend(struct codec_info_item *cii, pm_message_t state)
767 {
768 	return tas_suspend(cii->codec_data);
769 }
770 
_tas_resume(struct codec_info_item * cii)771 static int _tas_resume(struct codec_info_item *cii)
772 {
773 	return tas_resume(cii->codec_data);
774 }
775 #else /* CONFIG_PM */
776 #define _tas_suspend	NULL
777 #define _tas_resume	NULL
778 #endif /* CONFIG_PM */
779 
780 static struct codec_info tas_codec_info = {
781 	.transfers = tas_transfers,
782 	/* in theory, we can drive it at 512 too...
783 	 * but so far the framework doesn't allow
784 	 * for that and I don't see much point in it. */
785 	.sysclock_factor = 256,
786 	/* same here, could be 32 for just one 16 bit format */
787 	.bus_factor = 64,
788 	.owner = THIS_MODULE,
789 	.usable = tas_usable,
790 	.switch_clock = tas_switch_clock,
791 	.suspend = _tas_suspend,
792 	.resume = _tas_resume,
793 };
794 
tas_init_codec(struct aoa_codec * codec)795 static int tas_init_codec(struct aoa_codec *codec)
796 {
797 	struct tas *tas = codec_to_tas(codec);
798 	int err;
799 
800 	if (!tas->codec.gpio || !tas->codec.gpio->methods) {
801 		printk(KERN_ERR PFX "gpios not assigned!!\n");
802 		return -EINVAL;
803 	}
804 
805 	mutex_lock(&tas->mtx);
806 	if (tas_reset_init(tas)) {
807 		printk(KERN_ERR PFX "tas failed to initialise\n");
808 		mutex_unlock(&tas->mtx);
809 		return -ENXIO;
810 	}
811 	tas->hw_enabled = 1;
812 	mutex_unlock(&tas->mtx);
813 
814 	if (tas->codec.soundbus_dev->attach_codec(tas->codec.soundbus_dev,
815 						   aoa_get_card(),
816 						   &tas_codec_info, tas)) {
817 		printk(KERN_ERR PFX "error attaching tas to soundbus\n");
818 		return -ENODEV;
819 	}
820 
821 	if (aoa_snd_device_new(SNDRV_DEV_CODEC, tas, &ops)) {
822 		printk(KERN_ERR PFX "failed to create tas snd device!\n");
823 		return -ENODEV;
824 	}
825 	err = aoa_snd_ctl_add(snd_ctl_new1(&volume_control, tas));
826 	if (err)
827 		goto error;
828 
829 	err = aoa_snd_ctl_add(snd_ctl_new1(&mute_control, tas));
830 	if (err)
831 		goto error;
832 
833 	err = aoa_snd_ctl_add(snd_ctl_new1(&pcm1_control, tas));
834 	if (err)
835 		goto error;
836 
837 	err = aoa_snd_ctl_add(snd_ctl_new1(&monitor_control, tas));
838 	if (err)
839 		goto error;
840 
841 	err = aoa_snd_ctl_add(snd_ctl_new1(&capture_source_control, tas));
842 	if (err)
843 		goto error;
844 
845 	err = aoa_snd_ctl_add(snd_ctl_new1(&drc_range_control, tas));
846 	if (err)
847 		goto error;
848 
849 	err = aoa_snd_ctl_add(snd_ctl_new1(&drc_switch_control, tas));
850 	if (err)
851 		goto error;
852 
853 	err = aoa_snd_ctl_add(snd_ctl_new1(&treble_control, tas));
854 	if (err)
855 		goto error;
856 
857 	err = aoa_snd_ctl_add(snd_ctl_new1(&bass_control, tas));
858 	if (err)
859 		goto error;
860 
861 	return 0;
862  error:
863 	tas->codec.soundbus_dev->detach_codec(tas->codec.soundbus_dev, tas);
864 	snd_device_free(aoa_get_card(), tas);
865 	return err;
866 }
867 
tas_exit_codec(struct aoa_codec * codec)868 static void tas_exit_codec(struct aoa_codec *codec)
869 {
870 	struct tas *tas = codec_to_tas(codec);
871 
872 	if (!tas->codec.soundbus_dev)
873 		return;
874 	tas->codec.soundbus_dev->detach_codec(tas->codec.soundbus_dev, tas);
875 }
876 
877 
tas_i2c_probe(struct i2c_client * client)878 static int tas_i2c_probe(struct i2c_client *client)
879 {
880 	struct device_node *node = client->dev.of_node;
881 	struct tas *tas;
882 
883 	tas = kzalloc(sizeof(struct tas), GFP_KERNEL);
884 
885 	if (!tas)
886 		return -ENOMEM;
887 
888 	mutex_init(&tas->mtx);
889 	tas->i2c = client;
890 	i2c_set_clientdata(client, tas);
891 
892 	/* seems that half is a saner default */
893 	tas->drc_range = TAS3004_DRC_MAX / 2;
894 
895 	strscpy(tas->codec.name, "tas", MAX_CODEC_NAME_LEN);
896 	tas->codec.owner = THIS_MODULE;
897 	tas->codec.init = tas_init_codec;
898 	tas->codec.exit = tas_exit_codec;
899 	tas->codec.node = of_node_get(node);
900 
901 	if (aoa_codec_register(&tas->codec)) {
902 		goto fail;
903 	}
904 	printk(KERN_DEBUG
905 	       "snd-aoa-codec-tas: tas found, addr 0x%02x on %pOF\n",
906 	       (unsigned int)client->addr, node);
907 	return 0;
908  fail:
909 	mutex_destroy(&tas->mtx);
910 	kfree(tas);
911 	return -EINVAL;
912 }
913 
tas_i2c_remove(struct i2c_client * client)914 static void tas_i2c_remove(struct i2c_client *client)
915 {
916 	struct tas *tas = i2c_get_clientdata(client);
917 	u8 tmp = TAS_ACR_ANALOG_PDOWN;
918 
919 	aoa_codec_unregister(&tas->codec);
920 	of_node_put(tas->codec.node);
921 
922 	/* power down codec chip */
923 	tas_write_reg(tas, TAS_REG_ACR, 1, &tmp);
924 
925 	mutex_destroy(&tas->mtx);
926 	kfree(tas);
927 }
928 
929 static const struct i2c_device_id tas_i2c_id[] = {
930 	{ "MAC,tas3004", 0 },
931 	{ }
932 };
933 MODULE_DEVICE_TABLE(i2c,tas_i2c_id);
934 
935 static struct i2c_driver tas_driver = {
936 	.driver = {
937 		.name = "aoa_codec_tas",
938 	},
939 	.probe = tas_i2c_probe,
940 	.remove = tas_i2c_remove,
941 	.id_table = tas_i2c_id,
942 };
943 
944 module_i2c_driver(tas_driver);
945