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