1 // SPDX-License-Identifier: GPL-2.0-only
2 /*
3 * ALSA SoC WL1273 codec driver
4 *
5 * Author: Matti Aaltonen, <matti.j.aaltonen@nokia.com>
6 *
7 * Copyright: (C) 2010, 2011 Nokia Corporation
8 */
9
10 #include <linux/mfd/wl1273-core.h>
11 #include <linux/slab.h>
12 #include <linux/module.h>
13 #include <sound/pcm.h>
14 #include <sound/pcm_params.h>
15 #include <sound/soc.h>
16 #include <sound/initval.h>
17
18 #include "wl1273.h"
19
20 enum wl1273_mode { WL1273_MODE_BT, WL1273_MODE_FM_RX, WL1273_MODE_FM_TX };
21
22 /* codec private data */
23 struct wl1273_priv {
24 enum wl1273_mode mode;
25 struct wl1273_core *core;
26 unsigned int channels;
27 };
28
snd_wl1273_fm_set_i2s_mode(struct wl1273_core * core,int rate,int width)29 static int snd_wl1273_fm_set_i2s_mode(struct wl1273_core *core,
30 int rate, int width)
31 {
32 struct device *dev = &core->client->dev;
33 int r = 0;
34 u16 mode;
35
36 dev_dbg(dev, "rate: %d\n", rate);
37 dev_dbg(dev, "width: %d\n", width);
38
39 mutex_lock(&core->lock);
40
41 mode = core->i2s_mode & ~WL1273_IS2_WIDTH & ~WL1273_IS2_RATE;
42
43 switch (rate) {
44 case 48000:
45 mode |= WL1273_IS2_RATE_48K;
46 break;
47 case 44100:
48 mode |= WL1273_IS2_RATE_44_1K;
49 break;
50 case 32000:
51 mode |= WL1273_IS2_RATE_32K;
52 break;
53 case 22050:
54 mode |= WL1273_IS2_RATE_22_05K;
55 break;
56 case 16000:
57 mode |= WL1273_IS2_RATE_16K;
58 break;
59 case 12000:
60 mode |= WL1273_IS2_RATE_12K;
61 break;
62 case 11025:
63 mode |= WL1273_IS2_RATE_11_025;
64 break;
65 case 8000:
66 mode |= WL1273_IS2_RATE_8K;
67 break;
68 default:
69 dev_err(dev, "Sampling rate: %d not supported\n", rate);
70 r = -EINVAL;
71 goto out;
72 }
73
74 switch (width) {
75 case 16:
76 mode |= WL1273_IS2_WIDTH_32;
77 break;
78 case 20:
79 mode |= WL1273_IS2_WIDTH_40;
80 break;
81 case 24:
82 mode |= WL1273_IS2_WIDTH_48;
83 break;
84 case 25:
85 mode |= WL1273_IS2_WIDTH_50;
86 break;
87 case 30:
88 mode |= WL1273_IS2_WIDTH_60;
89 break;
90 case 32:
91 mode |= WL1273_IS2_WIDTH_64;
92 break;
93 case 40:
94 mode |= WL1273_IS2_WIDTH_80;
95 break;
96 case 48:
97 mode |= WL1273_IS2_WIDTH_96;
98 break;
99 case 64:
100 mode |= WL1273_IS2_WIDTH_128;
101 break;
102 default:
103 dev_err(dev, "Data width: %d not supported\n", width);
104 r = -EINVAL;
105 goto out;
106 }
107
108 dev_dbg(dev, "WL1273_I2S_DEF_MODE: 0x%04x\n", WL1273_I2S_DEF_MODE);
109 dev_dbg(dev, "core->i2s_mode: 0x%04x\n", core->i2s_mode);
110 dev_dbg(dev, "mode: 0x%04x\n", mode);
111
112 if (core->i2s_mode != mode) {
113 r = core->write(core, WL1273_I2S_MODE_CONFIG_SET, mode);
114 if (r)
115 goto out;
116
117 core->i2s_mode = mode;
118 r = core->write(core, WL1273_AUDIO_ENABLE,
119 WL1273_AUDIO_ENABLE_I2S);
120 if (r)
121 goto out;
122 }
123 out:
124 mutex_unlock(&core->lock);
125
126 return r;
127 }
128
snd_wl1273_fm_set_channel_number(struct wl1273_core * core,int channel_number)129 static int snd_wl1273_fm_set_channel_number(struct wl1273_core *core,
130 int channel_number)
131 {
132 struct device *dev = &core->client->dev;
133 int r = 0;
134
135 dev_dbg(dev, "%s\n", __func__);
136
137 mutex_lock(&core->lock);
138
139 if (core->channel_number == channel_number)
140 goto out;
141
142 if (channel_number == 1 && core->mode == WL1273_MODE_RX)
143 r = core->write(core, WL1273_MOST_MODE_SET, WL1273_RX_MONO);
144 else if (channel_number == 1 && core->mode == WL1273_MODE_TX)
145 r = core->write(core, WL1273_MONO_SET, WL1273_TX_MONO);
146 else if (channel_number == 2 && core->mode == WL1273_MODE_RX)
147 r = core->write(core, WL1273_MOST_MODE_SET, WL1273_RX_STEREO);
148 else if (channel_number == 2 && core->mode == WL1273_MODE_TX)
149 r = core->write(core, WL1273_MONO_SET, WL1273_TX_STEREO);
150 else
151 r = -EINVAL;
152 out:
153 mutex_unlock(&core->lock);
154
155 return r;
156 }
157
snd_wl1273_get_audio_route(struct snd_kcontrol * kcontrol,struct snd_ctl_elem_value * ucontrol)158 static int snd_wl1273_get_audio_route(struct snd_kcontrol *kcontrol,
159 struct snd_ctl_elem_value *ucontrol)
160 {
161 struct snd_soc_component *component = snd_soc_kcontrol_component(kcontrol);
162 struct wl1273_priv *wl1273 = snd_soc_component_get_drvdata(component);
163
164 ucontrol->value.enumerated.item[0] = wl1273->mode;
165
166 return 0;
167 }
168
169 /*
170 * TODO: Implement the audio routing in the driver. Now this control
171 * only indicates the setting that has been done elsewhere (in the user
172 * space).
173 */
174 static const char * const wl1273_audio_route[] = { "Bt", "FmRx", "FmTx" };
175
snd_wl1273_set_audio_route(struct snd_kcontrol * kcontrol,struct snd_ctl_elem_value * ucontrol)176 static int snd_wl1273_set_audio_route(struct snd_kcontrol *kcontrol,
177 struct snd_ctl_elem_value *ucontrol)
178 {
179 struct snd_soc_component *component = snd_soc_kcontrol_component(kcontrol);
180 struct wl1273_priv *wl1273 = snd_soc_component_get_drvdata(component);
181
182 if (wl1273->mode == ucontrol->value.enumerated.item[0])
183 return 0;
184
185 /* Do not allow changes while stream is running */
186 if (snd_soc_component_active(component))
187 return -EPERM;
188
189 if (ucontrol->value.enumerated.item[0] >= ARRAY_SIZE(wl1273_audio_route))
190 return -EINVAL;
191
192 wl1273->mode = ucontrol->value.enumerated.item[0];
193
194 return 1;
195 }
196
197 static SOC_ENUM_SINGLE_EXT_DECL(wl1273_enum, wl1273_audio_route);
198
snd_wl1273_fm_audio_get(struct snd_kcontrol * kcontrol,struct snd_ctl_elem_value * ucontrol)199 static int snd_wl1273_fm_audio_get(struct snd_kcontrol *kcontrol,
200 struct snd_ctl_elem_value *ucontrol)
201 {
202 struct snd_soc_component *component = snd_soc_kcontrol_component(kcontrol);
203 struct wl1273_priv *wl1273 = snd_soc_component_get_drvdata(component);
204
205 dev_dbg(component->dev, "%s: enter.\n", __func__);
206
207 ucontrol->value.enumerated.item[0] = wl1273->core->audio_mode;
208
209 return 0;
210 }
211
snd_wl1273_fm_audio_put(struct snd_kcontrol * kcontrol,struct snd_ctl_elem_value * ucontrol)212 static int snd_wl1273_fm_audio_put(struct snd_kcontrol *kcontrol,
213 struct snd_ctl_elem_value *ucontrol)
214 {
215 struct snd_soc_component *component = snd_soc_kcontrol_component(kcontrol);
216 struct wl1273_priv *wl1273 = snd_soc_component_get_drvdata(component);
217 int val, r = 0;
218
219 dev_dbg(component->dev, "%s: enter.\n", __func__);
220
221 val = ucontrol->value.enumerated.item[0];
222 if (wl1273->core->audio_mode == val)
223 return 0;
224
225 r = wl1273->core->set_audio(wl1273->core, val);
226 if (r < 0)
227 return r;
228
229 return 1;
230 }
231
232 static const char * const wl1273_audio_strings[] = { "Digital", "Analog" };
233
234 static SOC_ENUM_SINGLE_EXT_DECL(wl1273_audio_enum, wl1273_audio_strings);
235
snd_wl1273_fm_volume_get(struct snd_kcontrol * kcontrol,struct snd_ctl_elem_value * ucontrol)236 static int snd_wl1273_fm_volume_get(struct snd_kcontrol *kcontrol,
237 struct snd_ctl_elem_value *ucontrol)
238 {
239 struct snd_soc_component *component = snd_soc_kcontrol_component(kcontrol);
240 struct wl1273_priv *wl1273 = snd_soc_component_get_drvdata(component);
241
242 dev_dbg(component->dev, "%s: enter.\n", __func__);
243
244 ucontrol->value.integer.value[0] = wl1273->core->volume;
245
246 return 0;
247 }
248
snd_wl1273_fm_volume_put(struct snd_kcontrol * kcontrol,struct snd_ctl_elem_value * ucontrol)249 static int snd_wl1273_fm_volume_put(struct snd_kcontrol *kcontrol,
250 struct snd_ctl_elem_value *ucontrol)
251 {
252 struct snd_soc_component *component = snd_soc_kcontrol_component(kcontrol);
253 struct wl1273_priv *wl1273 = snd_soc_component_get_drvdata(component);
254 int r;
255
256 dev_dbg(component->dev, "%s: enter.\n", __func__);
257
258 r = wl1273->core->set_volume(wl1273->core,
259 ucontrol->value.integer.value[0]);
260 if (r)
261 return r;
262
263 return 1;
264 }
265
266 static const struct snd_kcontrol_new wl1273_controls[] = {
267 SOC_ENUM_EXT("Codec Mode", wl1273_enum,
268 snd_wl1273_get_audio_route, snd_wl1273_set_audio_route),
269 SOC_ENUM_EXT("Audio Switch", wl1273_audio_enum,
270 snd_wl1273_fm_audio_get, snd_wl1273_fm_audio_put),
271 SOC_SINGLE_EXT("Volume", 0, 0, WL1273_MAX_VOLUME, 0,
272 snd_wl1273_fm_volume_get, snd_wl1273_fm_volume_put),
273 };
274
275 static const struct snd_soc_dapm_widget wl1273_dapm_widgets[] = {
276 SND_SOC_DAPM_INPUT("RX"),
277
278 SND_SOC_DAPM_OUTPUT("TX"),
279 };
280
281 static const struct snd_soc_dapm_route wl1273_dapm_routes[] = {
282 { "Capture", NULL, "RX" },
283
284 { "TX", NULL, "Playback" },
285 };
286
wl1273_startup(struct snd_pcm_substream * substream,struct snd_soc_dai * dai)287 static int wl1273_startup(struct snd_pcm_substream *substream,
288 struct snd_soc_dai *dai)
289 {
290 struct snd_soc_component *component = dai->component;
291 struct wl1273_priv *wl1273 = snd_soc_component_get_drvdata(component);
292
293 switch (wl1273->mode) {
294 case WL1273_MODE_BT:
295 snd_pcm_hw_constraint_single(substream->runtime,
296 SNDRV_PCM_HW_PARAM_RATE, 8000);
297 snd_pcm_hw_constraint_single(substream->runtime,
298 SNDRV_PCM_HW_PARAM_CHANNELS, 1);
299 break;
300 case WL1273_MODE_FM_RX:
301 if (substream->stream == SNDRV_PCM_STREAM_PLAYBACK) {
302 pr_err("Cannot play in RX mode.\n");
303 return -EINVAL;
304 }
305 break;
306 case WL1273_MODE_FM_TX:
307 if (substream->stream == SNDRV_PCM_STREAM_CAPTURE) {
308 pr_err("Cannot capture in TX mode.\n");
309 return -EINVAL;
310 }
311 break;
312 default:
313 return -EINVAL;
314 }
315
316 return 0;
317 }
318
wl1273_hw_params(struct snd_pcm_substream * substream,struct snd_pcm_hw_params * params,struct snd_soc_dai * dai)319 static int wl1273_hw_params(struct snd_pcm_substream *substream,
320 struct snd_pcm_hw_params *params,
321 struct snd_soc_dai *dai)
322 {
323 struct wl1273_priv *wl1273 = snd_soc_component_get_drvdata(dai->component);
324 struct wl1273_core *core = wl1273->core;
325 unsigned int rate, width, r;
326
327 if (params_width(params) != 16) {
328 dev_err(dai->dev, "%d bits/sample not supported\n",
329 params_width(params));
330 return -EINVAL;
331 }
332
333 rate = params_rate(params);
334 width = hw_param_interval(params, SNDRV_PCM_HW_PARAM_SAMPLE_BITS)->min;
335
336 if (wl1273->mode == WL1273_MODE_BT) {
337 if (rate != 8000) {
338 pr_err("Rate %d not supported.\n", params_rate(params));
339 return -EINVAL;
340 }
341
342 if (params_channels(params) != 1) {
343 pr_err("Only mono supported.\n");
344 return -EINVAL;
345 }
346
347 return 0;
348 }
349
350 if (wl1273->mode == WL1273_MODE_FM_TX &&
351 substream->stream == SNDRV_PCM_STREAM_CAPTURE) {
352 pr_err("Only playback supported with TX.\n");
353 return -EINVAL;
354 }
355
356 if (wl1273->mode == WL1273_MODE_FM_RX &&
357 substream->stream == SNDRV_PCM_STREAM_PLAYBACK) {
358 pr_err("Only capture supported with RX.\n");
359 return -EINVAL;
360 }
361
362 if (wl1273->mode != WL1273_MODE_FM_RX &&
363 wl1273->mode != WL1273_MODE_FM_TX) {
364 pr_err("Unexpected mode: %d.\n", wl1273->mode);
365 return -EINVAL;
366 }
367
368 r = snd_wl1273_fm_set_i2s_mode(core, rate, width);
369 if (r)
370 return r;
371
372 wl1273->channels = params_channels(params);
373 r = snd_wl1273_fm_set_channel_number(core, wl1273->channels);
374 if (r)
375 return r;
376
377 return 0;
378 }
379
380 static const struct snd_soc_dai_ops wl1273_dai_ops = {
381 .startup = wl1273_startup,
382 .hw_params = wl1273_hw_params,
383 };
384
385 static struct snd_soc_dai_driver wl1273_dai = {
386 .name = "wl1273-fm",
387 .playback = {
388 .stream_name = "Playback",
389 .channels_min = 1,
390 .channels_max = 2,
391 .rates = SNDRV_PCM_RATE_8000_48000,
392 .formats = SNDRV_PCM_FMTBIT_S16_LE},
393 .capture = {
394 .stream_name = "Capture",
395 .channels_min = 1,
396 .channels_max = 2,
397 .rates = SNDRV_PCM_RATE_8000_48000,
398 .formats = SNDRV_PCM_FMTBIT_S16_LE},
399 .ops = &wl1273_dai_ops,
400 };
401
402 /* Audio interface format for the soc_card driver */
wl1273_get_format(struct snd_soc_component * component,unsigned int * fmt)403 int wl1273_get_format(struct snd_soc_component *component, unsigned int *fmt)
404 {
405 struct wl1273_priv *wl1273;
406
407 if (component == NULL || fmt == NULL)
408 return -EINVAL;
409
410 wl1273 = snd_soc_component_get_drvdata(component);
411
412 switch (wl1273->mode) {
413 case WL1273_MODE_FM_RX:
414 case WL1273_MODE_FM_TX:
415 *fmt = SND_SOC_DAIFMT_I2S |
416 SND_SOC_DAIFMT_NB_NF |
417 SND_SOC_DAIFMT_CBP_CFP;
418
419 break;
420 case WL1273_MODE_BT:
421 *fmt = SND_SOC_DAIFMT_DSP_A |
422 SND_SOC_DAIFMT_IB_NF |
423 SND_SOC_DAIFMT_CBP_CFP;
424
425 break;
426 default:
427 return -EINVAL;
428 }
429
430 return 0;
431 }
432 EXPORT_SYMBOL_GPL(wl1273_get_format);
433
wl1273_probe(struct snd_soc_component * component)434 static int wl1273_probe(struct snd_soc_component *component)
435 {
436 struct wl1273_core **core = component->dev->platform_data;
437 struct wl1273_priv *wl1273;
438
439 dev_dbg(component->dev, "%s.\n", __func__);
440
441 if (!core) {
442 dev_err(component->dev, "Platform data is missing.\n");
443 return -EINVAL;
444 }
445
446 wl1273 = kzalloc(sizeof(struct wl1273_priv), GFP_KERNEL);
447 if (!wl1273)
448 return -ENOMEM;
449
450 wl1273->mode = WL1273_MODE_BT;
451 wl1273->core = *core;
452
453 snd_soc_component_set_drvdata(component, wl1273);
454
455 return 0;
456 }
457
wl1273_remove(struct snd_soc_component * component)458 static void wl1273_remove(struct snd_soc_component *component)
459 {
460 struct wl1273_priv *wl1273 = snd_soc_component_get_drvdata(component);
461
462 dev_dbg(component->dev, "%s\n", __func__);
463 kfree(wl1273);
464 }
465
466 static const struct snd_soc_component_driver soc_component_dev_wl1273 = {
467 .probe = wl1273_probe,
468 .remove = wl1273_remove,
469 .controls = wl1273_controls,
470 .num_controls = ARRAY_SIZE(wl1273_controls),
471 .dapm_widgets = wl1273_dapm_widgets,
472 .num_dapm_widgets = ARRAY_SIZE(wl1273_dapm_widgets),
473 .dapm_routes = wl1273_dapm_routes,
474 .num_dapm_routes = ARRAY_SIZE(wl1273_dapm_routes),
475 .idle_bias_on = 1,
476 .use_pmdown_time = 1,
477 .endianness = 1,
478 };
479
wl1273_platform_probe(struct platform_device * pdev)480 static int wl1273_platform_probe(struct platform_device *pdev)
481 {
482 return devm_snd_soc_register_component(&pdev->dev,
483 &soc_component_dev_wl1273,
484 &wl1273_dai, 1);
485 }
486
487 MODULE_ALIAS("platform:wl1273-codec");
488
489 static struct platform_driver wl1273_platform_driver = {
490 .driver = {
491 .name = "wl1273-codec",
492 },
493 .probe = wl1273_platform_probe,
494 };
495
496 module_platform_driver(wl1273_platform_driver);
497
498 MODULE_AUTHOR("Matti Aaltonen <matti.j.aaltonen@nokia.com>");
499 MODULE_DESCRIPTION("ASoC WL1273 codec driver");
500 MODULE_LICENSE("GPL");
501