1 // SPDX-License-Identifier: GPL-2.0
2 //
3 // ASoC DPCM Machine driver for Baytrail / Cherrytrail platforms with
4 // CX2072X codec
5 //
6 
7 #include <linux/acpi.h>
8 #include <linux/device.h>
9 #include <linux/gpio/consumer.h>
10 #include <linux/module.h>
11 #include <linux/platform_device.h>
12 #include <linux/slab.h>
13 #include <sound/pcm.h>
14 #include <sound/pcm_params.h>
15 #include <sound/jack.h>
16 #include <sound/soc.h>
17 #include <sound/soc-acpi.h>
18 #include "../../codecs/cx2072x.h"
19 #include "../atom/sst-atom-controls.h"
20 
21 static const struct snd_soc_dapm_widget byt_cht_cx2072x_widgets[] = {
22 	SND_SOC_DAPM_HP("Headphone", NULL),
23 	SND_SOC_DAPM_MIC("Headset Mic", NULL),
24 	SND_SOC_DAPM_MIC("Int Mic", NULL),
25 	SND_SOC_DAPM_SPK("Ext Spk", NULL),
26 };
27 
28 static const struct snd_soc_dapm_route byt_cht_cx2072x_audio_map[] = {
29 	/* External Speakers: HFL, HFR */
30 	{"Headphone", NULL, "PORTA"},
31 	{"Ext Spk", NULL, "PORTG"},
32 	{"PORTC", NULL, "Int Mic"},
33 	{"PORTD", NULL, "Headset Mic"},
34 
35 	{"Playback", NULL, "ssp2 Tx"},
36 	{"ssp2 Tx", NULL, "codec_out0"},
37 	{"ssp2 Tx", NULL, "codec_out1"},
38 	{"codec_in0", NULL, "ssp2 Rx"},
39 	{"codec_in1", NULL, "ssp2 Rx"},
40 	{"ssp2 Rx", NULL, "Capture"},
41 };
42 
43 static const struct snd_kcontrol_new byt_cht_cx2072x_controls[] = {
44 	SOC_DAPM_PIN_SWITCH("Headphone"),
45 	SOC_DAPM_PIN_SWITCH("Headset Mic"),
46 	SOC_DAPM_PIN_SWITCH("Int Mic"),
47 	SOC_DAPM_PIN_SWITCH("Ext Spk"),
48 };
49 
50 static struct snd_soc_jack byt_cht_cx2072x_headset;
51 
52 /* Headset jack detection DAPM pins */
53 static struct snd_soc_jack_pin byt_cht_cx2072x_headset_pins[] = {
54 	{
55 		.pin = "Headset Mic",
56 		.mask = SND_JACK_MICROPHONE,
57 	},
58 	{
59 		.pin = "Headphone",
60 		.mask = SND_JACK_HEADPHONE,
61 	},
62 };
63 
64 static const struct acpi_gpio_params byt_cht_cx2072x_headset_gpios;
65 static const struct acpi_gpio_mapping byt_cht_cx2072x_acpi_gpios[] = {
66 	{ "headset-gpios", &byt_cht_cx2072x_headset_gpios, 1 },
67 	{},
68 };
69 
70 static int byt_cht_cx2072x_init(struct snd_soc_pcm_runtime *rtd)
71 {
72 	struct snd_soc_card *card = rtd->card;
73 	struct snd_soc_component *codec = rtd->codec_dai->component;
74 	int ret;
75 
76 	if (devm_acpi_dev_add_driver_gpios(codec->dev,
77 					   byt_cht_cx2072x_acpi_gpios))
78 		dev_warn(rtd->dev, "Unable to add GPIO mapping table\n");
79 
80 	card->dapm.idle_bias_off = true;
81 
82 	/* set the default PLL rate, the clock is handled by the codec driver */
83 	ret = snd_soc_dai_set_sysclk(rtd->codec_dai, CX2072X_MCLK_EXTERNAL_PLL,
84 				     19200000, SND_SOC_CLOCK_IN);
85 	if (ret) {
86 		dev_err(rtd->dev, "Could not set sysclk\n");
87 		return ret;
88 	}
89 
90 	ret = snd_soc_card_jack_new(card, "Headset",
91 				    SND_JACK_HEADSET | SND_JACK_BTN_0,
92 				    &byt_cht_cx2072x_headset,
93 				    byt_cht_cx2072x_headset_pins,
94 				    ARRAY_SIZE(byt_cht_cx2072x_headset_pins));
95 	if (ret)
96 		return ret;
97 
98 	snd_soc_component_set_jack(codec, &byt_cht_cx2072x_headset, NULL);
99 
100 	snd_soc_dai_set_bclk_ratio(rtd->codec_dai, 50);
101 
102 	return ret;
103 }
104 
105 static int byt_cht_cx2072x_fixup(struct snd_soc_pcm_runtime *rtd,
106 				 struct snd_pcm_hw_params *params)
107 {
108 	struct snd_interval *rate =
109 		hw_param_interval(params, SNDRV_PCM_HW_PARAM_RATE);
110 	struct snd_interval *channels =
111 		hw_param_interval(params, SNDRV_PCM_HW_PARAM_CHANNELS);
112 	int ret;
113 
114 	/* The DSP will covert the FE rate to 48k, stereo, 24bits */
115 	rate->min = rate->max = 48000;
116 	channels->min = channels->max = 2;
117 
118 	/* set SSP2 to 24-bit */
119 	params_set_format(params, SNDRV_PCM_FORMAT_S24_LE);
120 
121 	/*
122 	 * Default mode for SSP configuration is TDM 4 slot, override config
123 	 * with explicit setting to I2S 2ch 24-bit. The word length is set with
124 	 * dai_set_tdm_slot() since there is no other API exposed
125 	 */
126 	ret = snd_soc_dai_set_fmt(rtd->cpu_dai,
127 				SND_SOC_DAIFMT_I2S     |
128 				SND_SOC_DAIFMT_NB_NF   |
129 				SND_SOC_DAIFMT_CBS_CFS);
130 	if (ret < 0) {
131 		dev_err(rtd->dev, "can't set format to I2S, err %d\n", ret);
132 		return ret;
133 	}
134 
135 	ret = snd_soc_dai_set_tdm_slot(rtd->cpu_dai, 0x3, 0x3, 2, 24);
136 	if (ret < 0) {
137 		dev_err(rtd->dev, "can't set I2S config, err %d\n", ret);
138 		return ret;
139 	}
140 
141 	return 0;
142 }
143 
144 static int byt_cht_cx2072x_aif1_startup(struct snd_pcm_substream *substream)
145 {
146 	return snd_pcm_hw_constraint_single(substream->runtime,
147 					    SNDRV_PCM_HW_PARAM_RATE, 48000);
148 }
149 
150 static struct snd_soc_ops byt_cht_cx2072x_aif1_ops = {
151 	.startup = byt_cht_cx2072x_aif1_startup,
152 };
153 
154 SND_SOC_DAILINK_DEF(dummy,
155 	DAILINK_COMP_ARRAY(COMP_DUMMY()));
156 
157 SND_SOC_DAILINK_DEF(media,
158 	DAILINK_COMP_ARRAY(COMP_CPU("media-cpu-dai")));
159 
160 SND_SOC_DAILINK_DEF(deepbuffer,
161 	DAILINK_COMP_ARRAY(COMP_CPU("deepbuffer-cpu-dai")));
162 
163 SND_SOC_DAILINK_DEF(ssp2,
164 	DAILINK_COMP_ARRAY(COMP_CPU("ssp2-port")));
165 
166 SND_SOC_DAILINK_DEF(cx2072x,
167 	DAILINK_COMP_ARRAY(COMP_CODEC("i2c-14F10720:00", "cx2072x-hifi")));
168 
169 SND_SOC_DAILINK_DEF(platform,
170 	DAILINK_COMP_ARRAY(COMP_PLATFORM("sst-mfld-platform")));
171 
172 static struct snd_soc_dai_link byt_cht_cx2072x_dais[] = {
173 	[MERR_DPCM_AUDIO] = {
174 		.name = "Audio Port",
175 		.stream_name = "Audio",
176 		.nonatomic = true,
177 		.dynamic = 1,
178 		.dpcm_playback = 1,
179 		.dpcm_capture = 1,
180 		.ops = &byt_cht_cx2072x_aif1_ops,
181 		SND_SOC_DAILINK_REG(media, dummy, platform),
182 	},
183 	[MERR_DPCM_DEEP_BUFFER] = {
184 		.name = "Deep-Buffer Audio Port",
185 		.stream_name = "Deep-Buffer Audio",
186 		.nonatomic = true,
187 		.dynamic = 1,
188 		.dpcm_playback = 1,
189 		.ops = &byt_cht_cx2072x_aif1_ops,
190 		SND_SOC_DAILINK_REG(deepbuffer, dummy, platform),
191 	},
192 	/* back ends */
193 	{
194 		.name = "SSP2-Codec",
195 		.id = 0,
196 		.no_pcm = 1,
197 		.dai_fmt = SND_SOC_DAIFMT_I2S | SND_SOC_DAIFMT_NB_NF
198 					      | SND_SOC_DAIFMT_CBS_CFS,
199 		.init = byt_cht_cx2072x_init,
200 		.be_hw_params_fixup = byt_cht_cx2072x_fixup,
201 		.nonatomic = true,
202 		.dpcm_playback = 1,
203 		.dpcm_capture = 1,
204 		SND_SOC_DAILINK_REG(ssp2, cx2072x, platform),
205 	},
206 };
207 
208 /* SoC card */
209 static struct snd_soc_card byt_cht_cx2072x_card = {
210 	.name = "bytcht-cx2072x",
211 	.owner = THIS_MODULE,
212 	.dai_link = byt_cht_cx2072x_dais,
213 	.num_links = ARRAY_SIZE(byt_cht_cx2072x_dais),
214 	.dapm_widgets = byt_cht_cx2072x_widgets,
215 	.num_dapm_widgets = ARRAY_SIZE(byt_cht_cx2072x_widgets),
216 	.dapm_routes = byt_cht_cx2072x_audio_map,
217 	.num_dapm_routes = ARRAY_SIZE(byt_cht_cx2072x_audio_map),
218 	.controls = byt_cht_cx2072x_controls,
219 	.num_controls = ARRAY_SIZE(byt_cht_cx2072x_controls),
220 };
221 
222 static char codec_name[SND_ACPI_I2C_ID_LEN];
223 
224 static int snd_byt_cht_cx2072x_probe(struct platform_device *pdev)
225 {
226 	struct snd_soc_acpi_mach *mach;
227 	struct acpi_device *adev;
228 	int dai_index = 0;
229 	int i, ret;
230 
231 	byt_cht_cx2072x_card.dev = &pdev->dev;
232 	mach = dev_get_platdata(&pdev->dev);
233 
234 	/* fix index of codec dai */
235 	for (i = 0; i < ARRAY_SIZE(byt_cht_cx2072x_dais); i++) {
236 		if (!strcmp(byt_cht_cx2072x_dais[i].codecs->name,
237 			    "i2c-14F10720:00")) {
238 			dai_index = i;
239 			break;
240 		}
241 	}
242 
243 	/* fixup codec name based on HID */
244 	adev = acpi_dev_get_first_match_dev(mach->id, NULL, -1);
245 	if (adev) {
246 		snprintf(codec_name, sizeof(codec_name), "i2c-%s",
247 			 acpi_dev_name(adev));
248 		put_device(&adev->dev);
249 		byt_cht_cx2072x_dais[dai_index].codecs->name = codec_name;
250 	}
251 
252 	/* override plaform name, if required */
253 	ret = snd_soc_fixup_dai_links_platform_name(&byt_cht_cx2072x_card,
254 						    mach->mach_params.platform);
255 	if (ret)
256 		return ret;
257 
258 	return devm_snd_soc_register_card(&pdev->dev, &byt_cht_cx2072x_card);
259 }
260 
261 static struct platform_driver snd_byt_cht_cx2072x_driver = {
262 	.driver = {
263 		.name = "bytcht_cx2072x",
264 	},
265 	.probe = snd_byt_cht_cx2072x_probe,
266 };
267 module_platform_driver(snd_byt_cht_cx2072x_driver);
268 
269 MODULE_DESCRIPTION("ASoC Intel(R) Baytrail/Cherrytrail Machine driver");
270 MODULE_LICENSE("GPL v2");
271 MODULE_ALIAS("platform:bytcht_cx2072x");
272