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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
15static int sample_rate = 44100;
16
17static 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 = asoc_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
35
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
64static 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 = asoc_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
104static int littlemill_hw_params(struct snd_pcm_substream *substream,
105 struct snd_pcm_hw_params *params)
106{
107 struct snd_soc_pcm_runtime *rtd = asoc_substream_to_rtd(substream);
108 struct snd_soc_dai *codec_dai = asoc_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
133static const struct snd_soc_ops littlemill_ops = {
134 .hw_params = littlemill_hw_params,
135};
136
137static 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
145SND_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
150SND_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
155static 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 .params = &baseband_params,
171 SND_SOC_DAILINK_REG(baseband),
172 },
173};
174
175static 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 = asoc_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
226static const struct snd_kcontrol_new controls[] = {
227 SOC_DAPM_PIN_SWITCH("WM1250 Input"),
228 SOC_DAPM_PIN_SWITCH("WM1250 Output"),
229};
230
231static struct snd_soc_dapm_widget widgets[] = {
232 SND_SOC_DAPM_HP("Headphone", NULL),
233
234 SND_SOC_DAPM_MIC("AMIC", NULL),
235 SND_SOC_DAPM_MIC("DMIC", NULL),
236
237 SND_SOC_DAPM_SUPPLY_S("Baseband Clock", -1, SND_SOC_NOPM, 0, 0,
238 bbclk_ev,
239 SND_SOC_DAPM_PRE_PMU | SND_SOC_DAPM_POST_PMD),
240};
241
242static struct snd_soc_dapm_route audio_paths[] = {
243 { "Headphone", NULL, "HPOUT1L" },
244 { "Headphone", NULL, "HPOUT1R" },
245
246 { "AMIC", NULL, "MICBIAS1" },
247 { "IN1LN", NULL, "AMIC" },
248
249 { "DMIC", NULL, "MICBIAS2" },
250 { "DMIC1DAT", NULL, "DMIC" },
251 { "DMIC2DAT", NULL, "DMIC" },
252
253 { "AIF2CLK", NULL, "Baseband Clock" },
254};
255
256static struct snd_soc_jack littlemill_headset;
257
258static int littlemill_late_probe(struct snd_soc_card *card)
259{
260 struct snd_soc_pcm_runtime *rtd;
261 struct snd_soc_component *component;
262 struct snd_soc_dai *aif1_dai;
263 struct snd_soc_dai *aif2_dai;
264 int ret;
265
266 rtd = snd_soc_get_pcm_runtime(card, &card->dai_link[0]);
267 component = asoc_rtd_to_codec(rtd, 0)->component;
268 aif1_dai = asoc_rtd_to_codec(rtd, 0);
269
270 rtd = snd_soc_get_pcm_runtime(card, &card->dai_link[1]);
271 aif2_dai = asoc_rtd_to_cpu(rtd, 0);
272
273 ret = snd_soc_dai_set_sysclk(aif1_dai, WM8994_SYSCLK_MCLK2,
274 32768, SND_SOC_CLOCK_IN);
275 if (ret < 0)
276 return ret;
277
278 ret = snd_soc_dai_set_sysclk(aif2_dai, WM8994_SYSCLK_MCLK2,
279 32768, SND_SOC_CLOCK_IN);
280 if (ret < 0)
281 return ret;
282
283 ret = snd_soc_card_jack_new(card, "Headset",
284 SND_JACK_HEADSET | SND_JACK_MECHANICAL |
285 SND_JACK_BTN_0 | SND_JACK_BTN_1 |
286 SND_JACK_BTN_2 | SND_JACK_BTN_3 |
287 SND_JACK_BTN_4 | SND_JACK_BTN_5,
288 &littlemill_headset, NULL, 0);
289 if (ret)
290 return ret;
291
292
293 wm8958_mic_detect(component, &littlemill_headset, NULL, NULL, NULL, NULL);
294
295
296 wm8994_mic_detect(component, &littlemill_headset, 1);
297
298 return 0;
299}
300
301static struct snd_soc_card littlemill = {
302 .name = "Littlemill",
303 .owner = THIS_MODULE,
304 .dai_link = littlemill_dai,
305 .num_links = ARRAY_SIZE(littlemill_dai),
306
307 .set_bias_level = littlemill_set_bias_level,
308 .set_bias_level_post = littlemill_set_bias_level_post,
309
310 .controls = controls,
311 .num_controls = ARRAY_SIZE(controls),
312 .dapm_widgets = widgets,
313 .num_dapm_widgets = ARRAY_SIZE(widgets),
314 .dapm_routes = audio_paths,
315 .num_dapm_routes = ARRAY_SIZE(audio_paths),
316
317 .late_probe = littlemill_late_probe,
318};
319
320static int littlemill_probe(struct platform_device *pdev)
321{
322 struct snd_soc_card *card = &littlemill;
323 int ret;
324
325 card->dev = &pdev->dev;
326
327 ret = devm_snd_soc_register_card(&pdev->dev, card);
328 if (ret && ret != -EPROBE_DEFER)
329 dev_err(&pdev->dev, "snd_soc_register_card() failed: %d\n",
330 ret);
331
332 return ret;
333}
334
335static struct platform_driver littlemill_driver = {
336 .driver = {
337 .name = "littlemill",
338 .pm = &snd_soc_pm_ops,
339 },
340 .probe = littlemill_probe,
341};
342
343module_platform_driver(littlemill_driver);
344
345MODULE_DESCRIPTION("Littlemill audio support");
346MODULE_AUTHOR("Mark Brown <broonie@opensource.wolfsonmicro.com>");
347MODULE_LICENSE("GPL");
348MODULE_ALIAS("platform:littlemill");
349
