1 // SPDX-License-Identifier: GPL-2.0+
2 //
3 // Littlemill audio support
4 //
5 // Copyright 2011 Wolfson Microelectronics
6
7 #include <sound/soc.h>
8 #include <sound/soc-dapm.h>
9 #include <sound/jack.h>
10 #include <linux/gpio.h>
11 #include <linux/module.h>
12
13 #include "../codecs/wm8994.h"
14
15 static int sample_rate = 44100;
16
littlemill_set_bias_level(struct snd_soc_card * card,struct snd_soc_dapm_context * dapm,enum snd_soc_bias_level level)17 static int littlemill_set_bias_level(struct snd_soc_card *card,
18 struct snd_soc_dapm_context *dapm,
19 enum snd_soc_bias_level level)
20 {
21 struct snd_soc_pcm_runtime *rtd;
22 struct snd_soc_dai *aif1_dai;
23 int ret;
24
25 rtd = snd_soc_get_pcm_runtime(card, &card->dai_link[0]);
26 aif1_dai = snd_soc_rtd_to_codec(rtd, 0);
27
28 if (dapm->dev != aif1_dai->dev)
29 return 0;
30
31 switch (level) {
32 case SND_SOC_BIAS_PREPARE:
33 /*
34 * If we've not already clocked things via hw_params()
35 * then do so now, otherwise these are noops.
36 */
37 if (dapm->bias_level == SND_SOC_BIAS_STANDBY) {
38 ret = snd_soc_dai_set_pll(aif1_dai, WM8994_FLL1,
39 WM8994_FLL_SRC_MCLK2, 32768,
40 sample_rate * 512);
41 if (ret < 0) {
42 pr_err("Failed to start FLL: %d\n", ret);
43 return ret;
44 }
45
46 ret = snd_soc_dai_set_sysclk(aif1_dai,
47 WM8994_SYSCLK_FLL1,
48 sample_rate * 512,
49 SND_SOC_CLOCK_IN);
50 if (ret < 0) {
51 pr_err("Failed to set SYSCLK: %d\n", ret);
52 return ret;
53 }
54 }
55 break;
56
57 default:
58 break;
59 }
60
61 return 0;
62 }
63
littlemill_set_bias_level_post(struct snd_soc_card * card,struct snd_soc_dapm_context * dapm,enum snd_soc_bias_level level)64 static int littlemill_set_bias_level_post(struct snd_soc_card *card,
65 struct snd_soc_dapm_context *dapm,
66 enum snd_soc_bias_level level)
67 {
68 struct snd_soc_pcm_runtime *rtd;
69 struct snd_soc_dai *aif1_dai;
70 int ret;
71
72 rtd = snd_soc_get_pcm_runtime(card, &card->dai_link[0]);
73 aif1_dai = snd_soc_rtd_to_codec(rtd, 0);
74
75 if (dapm->dev != aif1_dai->dev)
76 return 0;
77
78 switch (level) {
79 case SND_SOC_BIAS_STANDBY:
80 ret = snd_soc_dai_set_sysclk(aif1_dai, WM8994_SYSCLK_MCLK2,
81 32768, SND_SOC_CLOCK_IN);
82 if (ret < 0) {
83 pr_err("Failed to switch away from FLL1: %d\n", ret);
84 return ret;
85 }
86
87 ret = snd_soc_dai_set_pll(aif1_dai, WM8994_FLL1,
88 0, 0, 0);
89 if (ret < 0) {
90 pr_err("Failed to stop FLL1: %d\n", ret);
91 return ret;
92 }
93 break;
94
95 default:
96 break;
97 }
98
99 dapm->bias_level = level;
100
101 return 0;
102 }
103
littlemill_hw_params(struct snd_pcm_substream * substream,struct snd_pcm_hw_params * params)104 static int littlemill_hw_params(struct snd_pcm_substream *substream,
105 struct snd_pcm_hw_params *params)
106 {
107 struct snd_soc_pcm_runtime *rtd = snd_soc_substream_to_rtd(substream);
108 struct snd_soc_dai *codec_dai = snd_soc_rtd_to_codec(rtd, 0);
109 int ret;
110
111 sample_rate = params_rate(params);
112
113 ret = snd_soc_dai_set_pll(codec_dai, WM8994_FLL1,
114 WM8994_FLL_SRC_MCLK2, 32768,
115 sample_rate * 512);
116 if (ret < 0) {
117 pr_err("Failed to start FLL: %d\n", ret);
118 return ret;
119 }
120
121 ret = snd_soc_dai_set_sysclk(codec_dai,
122 WM8994_SYSCLK_FLL1,
123 sample_rate * 512,
124 SND_SOC_CLOCK_IN);
125 if (ret < 0) {
126 pr_err("Failed to set SYSCLK: %d\n", ret);
127 return ret;
128 }
129
130 return 0;
131 }
132
133 static const struct snd_soc_ops littlemill_ops = {
134 .hw_params = littlemill_hw_params,
135 };
136
137 static const struct snd_soc_pcm_stream baseband_params = {
138 .formats = SNDRV_PCM_FMTBIT_S32_LE,
139 .rate_min = 8000,
140 .rate_max = 8000,
141 .channels_min = 2,
142 .channels_max = 2,
143 };
144
145 SND_SOC_DAILINK_DEFS(cpu,
146 DAILINK_COMP_ARRAY(COMP_CPU("samsung-i2s.0")),
147 DAILINK_COMP_ARRAY(COMP_CODEC("wm8994-codec", "wm8994-aif1")),
148 DAILINK_COMP_ARRAY(COMP_PLATFORM("samsung-i2s.0")));
149
150 SND_SOC_DAILINK_DEFS(baseband,
151 DAILINK_COMP_ARRAY(COMP_CPU("wm8994-aif2")),
152 DAILINK_COMP_ARRAY(COMP_CODEC("wm1250-ev1.1-0027",
153 "wm1250-ev1")));
154
155 static struct snd_soc_dai_link littlemill_dai[] = {
156 {
157 .name = "CPU",
158 .stream_name = "CPU",
159 .dai_fmt = SND_SOC_DAIFMT_I2S | SND_SOC_DAIFMT_NB_NF
160 | SND_SOC_DAIFMT_CBM_CFM,
161 .ops = &littlemill_ops,
162 SND_SOC_DAILINK_REG(cpu),
163 },
164 {
165 .name = "Baseband",
166 .stream_name = "Baseband",
167 .dai_fmt = SND_SOC_DAIFMT_I2S | SND_SOC_DAIFMT_NB_NF
168 | SND_SOC_DAIFMT_CBM_CFM,
169 .ignore_suspend = 1,
170 .c2c_params = &baseband_params,
171 .num_c2c_params = 1,
172 SND_SOC_DAILINK_REG(baseband),
173 },
174 };
175
bbclk_ev(struct snd_soc_dapm_widget * w,struct snd_kcontrol * kcontrol,int event)176 static int bbclk_ev(struct snd_soc_dapm_widget *w,
177 struct snd_kcontrol *kcontrol, int event)
178 {
179 struct snd_soc_card *card = w->dapm->card;
180 struct snd_soc_pcm_runtime *rtd;
181 struct snd_soc_dai *aif2_dai;
182 int ret;
183
184 rtd = snd_soc_get_pcm_runtime(card, &card->dai_link[1]);
185 aif2_dai = snd_soc_rtd_to_cpu(rtd, 0);
186
187 switch (event) {
188 case SND_SOC_DAPM_PRE_PMU:
189 ret = snd_soc_dai_set_pll(aif2_dai, WM8994_FLL2,
190 WM8994_FLL_SRC_BCLK, 64 * 8000,
191 8000 * 256);
192 if (ret < 0) {
193 pr_err("Failed to start FLL: %d\n", ret);
194 return ret;
195 }
196
197 ret = snd_soc_dai_set_sysclk(aif2_dai, WM8994_SYSCLK_FLL2,
198 8000 * 256,
199 SND_SOC_CLOCK_IN);
200 if (ret < 0) {
201 pr_err("Failed to set SYSCLK: %d\n", ret);
202 return ret;
203 }
204 break;
205 case SND_SOC_DAPM_POST_PMD:
206 ret = snd_soc_dai_set_sysclk(aif2_dai, WM8994_SYSCLK_MCLK2,
207 32768, SND_SOC_CLOCK_IN);
208 if (ret < 0) {
209 pr_err("Failed to switch away from FLL2: %d\n", ret);
210 return ret;
211 }
212
213 ret = snd_soc_dai_set_pll(aif2_dai, WM8994_FLL2,
214 0, 0, 0);
215 if (ret < 0) {
216 pr_err("Failed to stop FLL2: %d\n", ret);
217 return ret;
218 }
219 break;
220 default:
221 return -EINVAL;
222 }
223
224 return 0;
225 }
226
227 static const struct snd_kcontrol_new controls[] = {
228 SOC_DAPM_PIN_SWITCH("Headphone"),
229 SOC_DAPM_PIN_SWITCH("Headset Mic"),
230 SOC_DAPM_PIN_SWITCH("WM1250 Input"),
231 SOC_DAPM_PIN_SWITCH("WM1250 Output"),
232 };
233
234 static const struct snd_soc_dapm_widget widgets[] = {
235 SND_SOC_DAPM_HP("Headphone", NULL),
236 SND_SOC_DAPM_HP("Headset Mic", NULL),
237
238 SND_SOC_DAPM_MIC("AMIC", NULL),
239 SND_SOC_DAPM_MIC("DMIC", NULL),
240
241 SND_SOC_DAPM_SUPPLY_S("Baseband Clock", -1, SND_SOC_NOPM, 0, 0,
242 bbclk_ev,
243 SND_SOC_DAPM_PRE_PMU | SND_SOC_DAPM_POST_PMD),
244 };
245
246 static const struct snd_soc_dapm_route audio_paths[] = {
247 { "Headphone", NULL, "HPOUT1L" },
248 { "Headphone", NULL, "HPOUT1R" },
249
250 { "AMIC", NULL, "MICBIAS1" }, /* Default for AMICBIAS jumper */
251 { "IN1LN", NULL, "AMIC" },
252
253 { "DMIC", NULL, "MICBIAS2" }, /* Default for DMICBIAS jumper */
254 { "DMIC1DAT", NULL, "DMIC" },
255 { "DMIC2DAT", NULL, "DMIC" },
256
257 { "AIF2CLK", NULL, "Baseband Clock" },
258 };
259
260 static struct snd_soc_jack littlemill_headset;
261 static struct snd_soc_jack_pin littlemill_headset_pins[] = {
262 {
263 .pin = "Headphone",
264 .mask = SND_JACK_HEADPHONE,
265 },
266 {
267 .pin = "Headset Mic",
268 .mask = SND_JACK_MICROPHONE,
269 },
270 };
271
littlemill_late_probe(struct snd_soc_card * card)272 static int littlemill_late_probe(struct snd_soc_card *card)
273 {
274 struct snd_soc_pcm_runtime *rtd;
275 struct snd_soc_component *component;
276 struct snd_soc_dai *aif1_dai;
277 struct snd_soc_dai *aif2_dai;
278 int ret;
279
280 rtd = snd_soc_get_pcm_runtime(card, &card->dai_link[0]);
281 component = snd_soc_rtd_to_codec(rtd, 0)->component;
282 aif1_dai = snd_soc_rtd_to_codec(rtd, 0);
283
284 rtd = snd_soc_get_pcm_runtime(card, &card->dai_link[1]);
285 aif2_dai = snd_soc_rtd_to_cpu(rtd, 0);
286
287 ret = snd_soc_dai_set_sysclk(aif1_dai, WM8994_SYSCLK_MCLK2,
288 32768, SND_SOC_CLOCK_IN);
289 if (ret < 0)
290 return ret;
291
292 ret = snd_soc_dai_set_sysclk(aif2_dai, WM8994_SYSCLK_MCLK2,
293 32768, SND_SOC_CLOCK_IN);
294 if (ret < 0)
295 return ret;
296
297 ret = snd_soc_card_jack_new_pins(card, "Headset",
298 SND_JACK_HEADSET | SND_JACK_MECHANICAL |
299 SND_JACK_BTN_0 | SND_JACK_BTN_1 |
300 SND_JACK_BTN_2 | SND_JACK_BTN_3 |
301 SND_JACK_BTN_4 | SND_JACK_BTN_5,
302 &littlemill_headset,
303 littlemill_headset_pins,
304 ARRAY_SIZE(littlemill_headset_pins));
305 if (ret)
306 return ret;
307
308 /* This will check device compatibility itself */
309 wm8958_mic_detect(component, &littlemill_headset, NULL, NULL, NULL, NULL);
310
311 /* As will this */
312 wm8994_mic_detect(component, &littlemill_headset, 1);
313
314 return 0;
315 }
316
317 static struct snd_soc_card littlemill = {
318 .name = "Littlemill",
319 .owner = THIS_MODULE,
320 .dai_link = littlemill_dai,
321 .num_links = ARRAY_SIZE(littlemill_dai),
322
323 .set_bias_level = littlemill_set_bias_level,
324 .set_bias_level_post = littlemill_set_bias_level_post,
325
326 .controls = controls,
327 .num_controls = ARRAY_SIZE(controls),
328 .dapm_widgets = widgets,
329 .num_dapm_widgets = ARRAY_SIZE(widgets),
330 .dapm_routes = audio_paths,
331 .num_dapm_routes = ARRAY_SIZE(audio_paths),
332
333 .late_probe = littlemill_late_probe,
334 };
335
littlemill_probe(struct platform_device * pdev)336 static int littlemill_probe(struct platform_device *pdev)
337 {
338 struct snd_soc_card *card = &littlemill;
339 int ret;
340
341 card->dev = &pdev->dev;
342
343 ret = devm_snd_soc_register_card(&pdev->dev, card);
344 if (ret)
345 dev_err_probe(&pdev->dev, ret, "snd_soc_register_card() failed\n");
346
347 return ret;
348 }
349
350 static struct platform_driver littlemill_driver = {
351 .driver = {
352 .name = "littlemill",
353 .pm = &snd_soc_pm_ops,
354 },
355 .probe = littlemill_probe,
356 };
357
358 module_platform_driver(littlemill_driver);
359
360 MODULE_DESCRIPTION("Littlemill audio support");
361 MODULE_AUTHOR("Mark Brown <broonie@opensource.wolfsonmicro.com>");
362 MODULE_LICENSE("GPL");
363 MODULE_ALIAS("platform:littlemill");
364