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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].name);
26 aif1_dai = rtd->codec_dai;
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].name);
73 aif1_dai = rtd->codec_dai;
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 = substream->private_data;
108 struct snd_soc_dai *codec_dai = rtd->codec_dai;
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 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
145static struct snd_soc_dai_link littlemill_dai[] = {
146 {
147 .name = "CPU",
148 .stream_name = "CPU",
149 .cpu_dai_name = "samsung-i2s.0",
150 .codec_dai_name = "wm8994-aif1",
151 .platform_name = "samsung-i2s.0",
152 .codec_name = "wm8994-codec",
153 .dai_fmt = SND_SOC_DAIFMT_I2S | SND_SOC_DAIFMT_NB_NF
154 | SND_SOC_DAIFMT_CBM_CFM,
155 .ops = &littlemill_ops,
156 },
157 {
158 .name = "Baseband",
159 .stream_name = "Baseband",
160 .cpu_dai_name = "wm8994-aif2",
161 .codec_dai_name = "wm1250-ev1",
162 .codec_name = "wm1250-ev1.1-0027",
163 .dai_fmt = SND_SOC_DAIFMT_I2S | SND_SOC_DAIFMT_NB_NF
164 | SND_SOC_DAIFMT_CBM_CFM,
165 .ignore_suspend = 1,
166 .params = &baseband_params,
167 },
168};
169
170static int bbclk_ev(struct snd_soc_dapm_widget *w,
171 struct snd_kcontrol *kcontrol, int event)
172{
173 struct snd_soc_card *card = w->dapm->card;
174 struct snd_soc_pcm_runtime *rtd;
175 struct snd_soc_dai *aif2_dai;
176 int ret;
177
178 rtd = snd_soc_get_pcm_runtime(card, card->dai_link[1].name);
179 aif2_dai = rtd->cpu_dai;
180
181 switch (event) {
182 case SND_SOC_DAPM_PRE_PMU:
183 ret = snd_soc_dai_set_pll(aif2_dai, WM8994_FLL2,
184 WM8994_FLL_SRC_BCLK, 64 * 8000,
185 8000 * 256);
186 if (ret < 0) {
187 pr_err("Failed to start FLL: %d\n", ret);
188 return ret;
189 }
190
191 ret = snd_soc_dai_set_sysclk(aif2_dai, WM8994_SYSCLK_FLL2,
192 8000 * 256,
193 SND_SOC_CLOCK_IN);
194 if (ret < 0) {
195 pr_err("Failed to set SYSCLK: %d\n", ret);
196 return ret;
197 }
198 break;
199 case SND_SOC_DAPM_POST_PMD:
200 ret = snd_soc_dai_set_sysclk(aif2_dai, WM8994_SYSCLK_MCLK2,
201 32768, SND_SOC_CLOCK_IN);
202 if (ret < 0) {
203 pr_err("Failed to switch away from FLL2: %d\n", ret);
204 return ret;
205 }
206
207 ret = snd_soc_dai_set_pll(aif2_dai, WM8994_FLL2,
208 0, 0, 0);
209 if (ret < 0) {
210 pr_err("Failed to stop FLL2: %d\n", ret);
211 return ret;
212 }
213 break;
214 default:
215 return -EINVAL;
216 }
217
218 return 0;
219}
220
221static const struct snd_kcontrol_new controls[] = {
222 SOC_DAPM_PIN_SWITCH("WM1250 Input"),
223 SOC_DAPM_PIN_SWITCH("WM1250 Output"),
224};
225
226static struct snd_soc_dapm_widget widgets[] = {
227 SND_SOC_DAPM_HP("Headphone", NULL),
228
229 SND_SOC_DAPM_MIC("AMIC", NULL),
230 SND_SOC_DAPM_MIC("DMIC", NULL),
231
232 SND_SOC_DAPM_SUPPLY_S("Baseband Clock", -1, SND_SOC_NOPM, 0, 0,
233 bbclk_ev,
234 SND_SOC_DAPM_PRE_PMU | SND_SOC_DAPM_POST_PMD),
235};
236
237static struct snd_soc_dapm_route audio_paths[] = {
238 { "Headphone", NULL, "HPOUT1L" },
239 { "Headphone", NULL, "HPOUT1R" },
240
241 { "AMIC", NULL, "MICBIAS1" },
242 { "IN1LN", NULL, "AMIC" },
243
244 { "DMIC", NULL, "MICBIAS2" },
245 { "DMIC1DAT", NULL, "DMIC" },
246 { "DMIC2DAT", NULL, "DMIC" },
247
248 { "AIF2CLK", NULL, "Baseband Clock" },
249};
250
251static struct snd_soc_jack littlemill_headset;
252
253static int littlemill_late_probe(struct snd_soc_card *card)
254{
255 struct snd_soc_pcm_runtime *rtd;
256 struct snd_soc_component *component;
257 struct snd_soc_dai *aif1_dai;
258 struct snd_soc_dai *aif2_dai;
259 int ret;
260
261 rtd = snd_soc_get_pcm_runtime(card, card->dai_link[0].name);
262 component = rtd->codec_dai->component;
263 aif1_dai = rtd->codec_dai;
264
265 rtd = snd_soc_get_pcm_runtime(card, card->dai_link[1].name);
266 aif2_dai = rtd->cpu_dai;
267
268 ret = snd_soc_dai_set_sysclk(aif1_dai, WM8994_SYSCLK_MCLK2,
269 32768, SND_SOC_CLOCK_IN);
270 if (ret < 0)
271 return ret;
272
273 ret = snd_soc_dai_set_sysclk(aif2_dai, WM8994_SYSCLK_MCLK2,
274 32768, SND_SOC_CLOCK_IN);
275 if (ret < 0)
276 return ret;
277
278 ret = snd_soc_card_jack_new(card, "Headset",
279 SND_JACK_HEADSET | SND_JACK_MECHANICAL |
280 SND_JACK_BTN_0 | SND_JACK_BTN_1 |
281 SND_JACK_BTN_2 | SND_JACK_BTN_3 |
282 SND_JACK_BTN_4 | SND_JACK_BTN_5,
283 &littlemill_headset, NULL, 0);
284 if (ret)
285 return ret;
286
287
288 wm8958_mic_detect(component, &littlemill_headset, NULL, NULL, NULL, NULL);
289
290
291 wm8994_mic_detect(component, &littlemill_headset, 1);
292
293 return 0;
294}
295
296static struct snd_soc_card littlemill = {
297 .name = "Littlemill",
298 .owner = THIS_MODULE,
299 .dai_link = littlemill_dai,
300 .num_links = ARRAY_SIZE(littlemill_dai),
301
302 .set_bias_level = littlemill_set_bias_level,
303 .set_bias_level_post = littlemill_set_bias_level_post,
304
305 .controls = controls,
306 .num_controls = ARRAY_SIZE(controls),
307 .dapm_widgets = widgets,
308 .num_dapm_widgets = ARRAY_SIZE(widgets),
309 .dapm_routes = audio_paths,
310 .num_dapm_routes = ARRAY_SIZE(audio_paths),
311
312 .late_probe = littlemill_late_probe,
313};
314
315static int littlemill_probe(struct platform_device *pdev)
316{
317 struct snd_soc_card *card = &littlemill;
318 int ret;
319
320 card->dev = &pdev->dev;
321
322 ret = devm_snd_soc_register_card(&pdev->dev, card);
323 if (ret)
324 dev_err(&pdev->dev, "snd_soc_register_card() failed: %d\n",
325 ret);
326
327 return ret;
328}
329
330static struct platform_driver littlemill_driver = {
331 .driver = {
332 .name = "littlemill",
333 .pm = &snd_soc_pm_ops,
334 },
335 .probe = littlemill_probe,
336};
337
338module_platform_driver(littlemill_driver);
339
340MODULE_DESCRIPTION("Littlemill audio support");
341MODULE_AUTHOR("Mark Brown <broonie@opensource.wolfsonmicro.com>");
342MODULE_LICENSE("GPL");
343MODULE_ALIAS("platform:littlemill");
344
