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