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
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		 * 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
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 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" },   /* Default for AMICBIAS jumper */
247	{ "IN1LN", NULL, "AMIC" },
248
249	{ "DMIC", NULL, "MICBIAS2" },   /* Default for DMICBIAS jumper */
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	/* This will check device compatibility itself */
293	wm8958_mic_detect(component, &littlemill_headset, NULL, NULL, NULL, NULL);
294
295	/* As will this */
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)
329		dev_err_probe(&pdev->dev, ret, "snd_soc_register_card() failed\n");
330
331	return ret;
332}
333
334static struct platform_driver littlemill_driver = {
335	.driver = {
336		.name = "littlemill",
337		.pm = &snd_soc_pm_ops,
338	},
339	.probe = littlemill_probe,
340};
341
342module_platform_driver(littlemill_driver);
343
344MODULE_DESCRIPTION("Littlemill audio support");
345MODULE_AUTHOR("Mark Brown <broonie@opensource.wolfsonmicro.com>");
346MODULE_LICENSE("GPL");
347MODULE_ALIAS("platform:littlemill");
348