1 /*
2  *  bytcht-da7213.c - ASoc Machine driver for Intel Baytrail and
3  *             Cherrytrail-based platforms, with Dialog DA7213 codec
4  *
5  *  Copyright (C) 2017 Intel Corporation
6  *  Author: Pierre-Louis Bossart <pierre-louis.bossart@linux.intel.com>
7  *
8  *  ~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
9  *
10  *  This program is free software; you can redistribute it and/or modify
11  *  it under the terms of the GNU General Public License as published by
12  *  the Free Software Foundation; version 2 of the License.
13  *
14  *  This program is distributed in the hope that it will be useful, but
15  *  WITHOUT ANY WARRANTY; without even the implied warranty of
16  *  MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
17  *  General Public License for more details.
18  *
19  * ~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
20  */
21 
22 #include <linux/module.h>
23 #include <linux/acpi.h>
24 #include <linux/platform_device.h>
25 #include <linux/slab.h>
26 #include <asm/platform_sst_audio.h>
27 #include <sound/pcm.h>
28 #include <sound/pcm_params.h>
29 #include <sound/soc.h>
30 #include <sound/soc-acpi.h>
31 #include "../../codecs/da7213.h"
32 #include "../atom/sst-atom-controls.h"
33 
34 static const struct snd_kcontrol_new controls[] = {
35 	SOC_DAPM_PIN_SWITCH("Headphone Jack"),
36 	SOC_DAPM_PIN_SWITCH("Headset Mic"),
37 	SOC_DAPM_PIN_SWITCH("Mic"),
38 	SOC_DAPM_PIN_SWITCH("Aux In"),
39 };
40 
41 static const struct snd_soc_dapm_widget dapm_widgets[] = {
42 	SND_SOC_DAPM_HP("Headphone Jack", NULL),
43 	SND_SOC_DAPM_MIC("Headset Mic", NULL),
44 	SND_SOC_DAPM_MIC("Mic", NULL),
45 	SND_SOC_DAPM_LINE("Aux In", NULL),
46 };
47 
48 static const struct snd_soc_dapm_route audio_map[] = {
49 	{"Headphone Jack", NULL, "HPL"},
50 	{"Headphone Jack", NULL, "HPR"},
51 
52 	{"AUXL", NULL, "Aux In"},
53 	{"AUXR", NULL, "Aux In"},
54 
55 	/* Assume Mic1 is linked to Headset and Mic2 to on-board mic */
56 	{"MIC1", NULL, "Headset Mic"},
57 	{"MIC2", NULL, "Mic"},
58 
59 	/* SOC-codec link */
60 	{"ssp2 Tx", NULL, "codec_out0"},
61 	{"ssp2 Tx", NULL, "codec_out1"},
62 	{"codec_in0", NULL, "ssp2 Rx"},
63 	{"codec_in1", NULL, "ssp2 Rx"},
64 
65 	{"Playback", NULL, "ssp2 Tx"},
66 	{"ssp2 Rx", NULL, "Capture"},
67 };
68 
69 static int codec_fixup(struct snd_soc_pcm_runtime *rtd,
70 		       struct snd_pcm_hw_params *params)
71 {
72 	int ret;
73 	struct snd_interval *rate = hw_param_interval(params,
74 			SNDRV_PCM_HW_PARAM_RATE);
75 	struct snd_interval *channels = hw_param_interval(params,
76 						SNDRV_PCM_HW_PARAM_CHANNELS);
77 
78 	/* The DSP will convert the FE rate to 48k, stereo, 24bits */
79 	rate->min = rate->max = 48000;
80 	channels->min = channels->max = 2;
81 
82 	/* set SSP2 to 24-bit */
83 	params_set_format(params, SNDRV_PCM_FORMAT_S24_LE);
84 
85 	/*
86 	 * Default mode for SSP configuration is TDM 4 slot, override config
87 	 * with explicit setting to I2S 2ch 24-bit. The word length is set with
88 	 * dai_set_tdm_slot() since there is no other API exposed
89 	 */
90 	ret = snd_soc_dai_set_fmt(rtd->cpu_dai,
91 				  SND_SOC_DAIFMT_I2S     |
92 				  SND_SOC_DAIFMT_NB_NF   |
93 				  SND_SOC_DAIFMT_CBS_CFS);
94 	if (ret < 0) {
95 		dev_err(rtd->dev, "can't set format to I2S, err %d\n", ret);
96 		return ret;
97 	}
98 
99 	ret = snd_soc_dai_set_tdm_slot(rtd->cpu_dai, 0x3, 0x3, 2, 24);
100 	if (ret < 0) {
101 		dev_err(rtd->dev, "can't set I2S config, err %d\n", ret);
102 		return ret;
103 	}
104 
105 	return 0;
106 }
107 
108 static int aif1_startup(struct snd_pcm_substream *substream)
109 {
110 	return snd_pcm_hw_constraint_single(substream->runtime,
111 			SNDRV_PCM_HW_PARAM_RATE, 48000);
112 }
113 
114 static int aif1_hw_params(struct snd_pcm_substream *substream,
115 			  struct snd_pcm_hw_params *params)
116 {
117 	struct snd_soc_pcm_runtime *rtd = substream->private_data;
118 	struct snd_soc_dai *codec_dai = rtd->codec_dai;
119 	int ret;
120 
121 	ret = snd_soc_dai_set_sysclk(codec_dai, DA7213_CLKSRC_MCLK,
122 				     19200000, SND_SOC_CLOCK_IN);
123 	if (ret < 0)
124 		dev_err(codec_dai->dev, "can't set codec sysclk configuration\n");
125 
126 	ret = snd_soc_dai_set_pll(codec_dai, 0,
127 			DA7213_SYSCLK_PLL_SRM, 0, DA7213_PLL_FREQ_OUT_98304000);
128 	if (ret < 0) {
129 		dev_err(codec_dai->dev, "failed to start PLL: %d\n", ret);
130 		return -EIO;
131 	}
132 
133 	return ret;
134 }
135 
136 static int aif1_hw_free(struct snd_pcm_substream *substream)
137 {
138 	struct snd_soc_pcm_runtime *rtd = substream->private_data;
139 	struct snd_soc_dai *codec_dai = rtd->codec_dai;
140 	int ret;
141 
142 	ret = snd_soc_dai_set_pll(codec_dai, 0,
143 				  DA7213_SYSCLK_MCLK, 0, 0);
144 	if (ret < 0) {
145 		dev_err(codec_dai->dev, "failed to stop PLL: %d\n", ret);
146 		return -EIO;
147 	}
148 
149 	return ret;
150 }
151 
152 static const struct snd_soc_ops aif1_ops = {
153 	.startup = aif1_startup,
154 };
155 
156 static const struct snd_soc_ops ssp2_ops = {
157 	.hw_params = aif1_hw_params,
158 	.hw_free = aif1_hw_free,
159 
160 };
161 
162 static struct snd_soc_dai_link dailink[] = {
163 	[MERR_DPCM_AUDIO] = {
164 		.name = "Audio Port",
165 		.stream_name = "Audio",
166 		.cpu_dai_name = "media-cpu-dai",
167 		.codec_dai_name = "snd-soc-dummy-dai",
168 		.codec_name = "snd-soc-dummy",
169 		.platform_name = "sst-mfld-platform",
170 		.nonatomic = true,
171 		.dynamic = 1,
172 		.dpcm_playback = 1,
173 		.dpcm_capture = 1,
174 		.ops = &aif1_ops,
175 	},
176 	[MERR_DPCM_DEEP_BUFFER] = {
177 		.name = "Deep-Buffer Audio Port",
178 		.stream_name = "Deep-Buffer Audio",
179 		.cpu_dai_name = "deepbuffer-cpu-dai",
180 		.codec_dai_name = "snd-soc-dummy-dai",
181 		.codec_name = "snd-soc-dummy",
182 		.platform_name = "sst-mfld-platform",
183 		.nonatomic = true,
184 		.dynamic = 1,
185 		.dpcm_playback = 1,
186 		.ops = &aif1_ops,
187 	},
188 	/* CODEC<->CODEC link */
189 	/* back ends */
190 	{
191 		.name = "SSP2-Codec",
192 		.id = 0,
193 		.cpu_dai_name = "ssp2-port",
194 		.platform_name = "sst-mfld-platform",
195 		.no_pcm = 1,
196 		.codec_dai_name = "da7213-hifi",
197 		.codec_name = "i2c-DLGS7213:00",
198 		.dai_fmt = SND_SOC_DAIFMT_I2S | SND_SOC_DAIFMT_NB_NF
199 						| SND_SOC_DAIFMT_CBS_CFS,
200 		.be_hw_params_fixup = codec_fixup,
201 		.nonatomic = true,
202 		.dpcm_playback = 1,
203 		.dpcm_capture = 1,
204 		.ops = &ssp2_ops,
205 	},
206 };
207 
208 /* SoC card */
209 static struct snd_soc_card bytcht_da7213_card = {
210 	.name = "bytcht-da7213",
211 	.owner = THIS_MODULE,
212 	.dai_link = dailink,
213 	.num_links = ARRAY_SIZE(dailink),
214 	.controls = controls,
215 	.num_controls = ARRAY_SIZE(controls),
216 	.dapm_widgets = dapm_widgets,
217 	.num_dapm_widgets = ARRAY_SIZE(dapm_widgets),
218 	.dapm_routes = audio_map,
219 	.num_dapm_routes = ARRAY_SIZE(audio_map),
220 };
221 
222 static char codec_name[SND_ACPI_I2C_ID_LEN];
223 
224 static int bytcht_da7213_probe(struct platform_device *pdev)
225 {
226 	struct snd_soc_card *card;
227 	struct snd_soc_acpi_mach *mach;
228 	const char *i2c_name = NULL;
229 	int dai_index = 0;
230 	int ret_val = 0;
231 	int i;
232 
233 	mach = (&pdev->dev)->platform_data;
234 	card = &bytcht_da7213_card;
235 	card->dev = &pdev->dev;
236 
237 	/* fix index of codec dai */
238 	for (i = 0; i < ARRAY_SIZE(dailink); i++) {
239 		if (!strcmp(dailink[i].codec_name, "i2c-DLGS7213:00")) {
240 			dai_index = i;
241 			break;
242 		}
243 	}
244 
245 	/* fixup codec name based on HID */
246 	i2c_name = acpi_dev_get_first_match_name(mach->id, NULL, -1);
247 	if (i2c_name) {
248 		snprintf(codec_name, sizeof(codec_name),
249 			"%s%s", "i2c-", i2c_name);
250 		dailink[dai_index].codec_name = codec_name;
251 	}
252 
253 	ret_val = devm_snd_soc_register_card(&pdev->dev, card);
254 	if (ret_val) {
255 		dev_err(&pdev->dev,
256 			"snd_soc_register_card failed %d\n", ret_val);
257 		return ret_val;
258 	}
259 	platform_set_drvdata(pdev, card);
260 	return ret_val;
261 }
262 
263 static struct platform_driver bytcht_da7213_driver = {
264 	.driver = {
265 		.name = "bytcht_da7213",
266 	},
267 	.probe = bytcht_da7213_probe,
268 };
269 module_platform_driver(bytcht_da7213_driver);
270 
271 MODULE_DESCRIPTION("ASoC Intel(R) Baytrail/Cherrytrail+DA7213 Machine driver");
272 MODULE_AUTHOR("Pierre-Louis Bossart");
273 MODULE_LICENSE("GPL v2");
274 MODULE_ALIAS("platform:bytcht_da7213");
275