xref: /openbmc/linux/sound/soc/qcom/apq8016_sbc.c (revision c2cd9d04)
1 // SPDX-License-Identifier: GPL-2.0-only
2 /*
3  * Copyright (c) 2015 The Linux Foundation. All rights reserved.
4  */
5 
6 #include <linux/device.h>
7 #include <linux/module.h>
8 #include <linux/kernel.h>
9 #include <linux/io.h>
10 #include <linux/of.h>
11 #include <linux/clk.h>
12 #include <linux/platform_device.h>
13 #include <sound/pcm.h>
14 #include <sound/pcm_params.h>
15 #include <sound/jack.h>
16 #include <sound/soc.h>
17 #include <uapi/linux/input-event-codes.h>
18 #include <dt-bindings/sound/apq8016-lpass.h>
19 
20 struct apq8016_sbc_data {
21 	void __iomem *mic_iomux;
22 	void __iomem *spkr_iomux;
23 	struct snd_soc_jack jack;
24 	bool jack_setup;
25 	struct snd_soc_dai_link dai_link[];	/* dynamically allocated */
26 };
27 
28 #define MIC_CTRL_TER_WS_SLAVE_SEL	BIT(21)
29 #define MIC_CTRL_QUA_WS_SLAVE_SEL_10	BIT(17)
30 #define MIC_CTRL_TLMM_SCLK_EN		BIT(1)
31 #define	SPKR_CTL_PRI_WS_SLAVE_SEL_11	(BIT(17) | BIT(16))
32 #define DEFAULT_MCLK_RATE		9600000
33 
34 static int apq8016_sbc_dai_init(struct snd_soc_pcm_runtime *rtd)
35 {
36 	struct snd_soc_dai *cpu_dai = rtd->cpu_dai;
37 	struct snd_soc_component *component;
38 	struct snd_soc_dai_link *dai_link = rtd->dai_link;
39 	struct snd_soc_card *card = rtd->card;
40 	struct apq8016_sbc_data *pdata = snd_soc_card_get_drvdata(card);
41 	int i, rval;
42 
43 	switch (cpu_dai->id) {
44 	case MI2S_PRIMARY:
45 		writel(readl(pdata->spkr_iomux) | SPKR_CTL_PRI_WS_SLAVE_SEL_11,
46 			pdata->spkr_iomux);
47 		break;
48 
49 	case MI2S_QUATERNARY:
50 		/* Configure the Quat MI2S to TLMM */
51 		writel(readl(pdata->mic_iomux) | MIC_CTRL_QUA_WS_SLAVE_SEL_10 |
52 			MIC_CTRL_TLMM_SCLK_EN,
53 			pdata->mic_iomux);
54 		break;
55 	case MI2S_TERTIARY:
56 		writel(readl(pdata->mic_iomux) | MIC_CTRL_TER_WS_SLAVE_SEL |
57 			MIC_CTRL_TLMM_SCLK_EN,
58 			pdata->mic_iomux);
59 
60 		break;
61 
62 	default:
63 		dev_err(card->dev, "unsupported cpu dai configuration\n");
64 		return -EINVAL;
65 
66 	}
67 
68 	if (!pdata->jack_setup) {
69 		struct snd_jack *jack;
70 
71 		rval = snd_soc_card_jack_new(card, "Headset Jack",
72 					     SND_JACK_HEADSET |
73 					     SND_JACK_HEADPHONE |
74 					     SND_JACK_BTN_0 | SND_JACK_BTN_1 |
75 					     SND_JACK_BTN_2 | SND_JACK_BTN_3 |
76 					     SND_JACK_BTN_4,
77 					     &pdata->jack, NULL, 0);
78 
79 		if (rval < 0) {
80 			dev_err(card->dev, "Unable to add Headphone Jack\n");
81 			return rval;
82 		}
83 
84 		jack = pdata->jack.jack;
85 
86 		snd_jack_set_key(jack, SND_JACK_BTN_0, KEY_PLAYPAUSE);
87 		snd_jack_set_key(jack, SND_JACK_BTN_1, KEY_VOICECOMMAND);
88 		snd_jack_set_key(jack, SND_JACK_BTN_2, KEY_VOLUMEUP);
89 		snd_jack_set_key(jack, SND_JACK_BTN_3, KEY_VOLUMEDOWN);
90 		pdata->jack_setup = true;
91 	}
92 
93 	for (i = 0 ; i < dai_link->num_codecs; i++) {
94 		struct snd_soc_dai *dai = rtd->codec_dais[i];
95 
96 		component = dai->component;
97 		/* Set default mclk for internal codec */
98 		rval = snd_soc_component_set_sysclk(component, 0, 0, DEFAULT_MCLK_RATE,
99 				       SND_SOC_CLOCK_IN);
100 		if (rval != 0 && rval != -ENOTSUPP) {
101 			dev_warn(card->dev, "Failed to set mclk: %d\n", rval);
102 			return rval;
103 		}
104 		rval = snd_soc_component_set_jack(component, &pdata->jack, NULL);
105 		if (rval != 0 && rval != -ENOTSUPP) {
106 			dev_warn(card->dev, "Failed to set jack: %d\n", rval);
107 			return rval;
108 		}
109 	}
110 
111 	return 0;
112 }
113 
114 static struct apq8016_sbc_data *apq8016_sbc_parse_of(struct snd_soc_card *card)
115 {
116 	struct device *dev = card->dev;
117 	struct snd_soc_dai_link *link;
118 	struct device_node *np, *codec, *cpu, *node  = dev->of_node;
119 	struct apq8016_sbc_data *data;
120 	int ret, num_links;
121 
122 	ret = snd_soc_of_parse_card_name(card, "qcom,model");
123 	if (ret) {
124 		dev_err(dev, "Error parsing card name: %d\n", ret);
125 		return ERR_PTR(ret);
126 	}
127 
128 	/* DAPM routes */
129 	if (of_property_read_bool(node, "qcom,audio-routing")) {
130 		ret = snd_soc_of_parse_audio_routing(card,
131 					"qcom,audio-routing");
132 		if (ret)
133 			return ERR_PTR(ret);
134 	}
135 
136 
137 	/* Populate links */
138 	num_links = of_get_child_count(node);
139 
140 	/* Allocate the private data and the DAI link array */
141 	data = devm_kzalloc(dev,
142 			    struct_size(data, dai_link, num_links),
143 			    GFP_KERNEL);
144 	if (!data)
145 		return ERR_PTR(-ENOMEM);
146 
147 	card->dai_link	= &data->dai_link[0];
148 	card->num_links	= num_links;
149 
150 	link = data->dai_link;
151 
152 	for_each_child_of_node(node, np) {
153 		cpu = of_get_child_by_name(np, "cpu");
154 		codec = of_get_child_by_name(np, "codec");
155 
156 		if (!cpu || !codec) {
157 			dev_err(dev, "Can't find cpu/codec DT node\n");
158 			ret = -EINVAL;
159 			goto error;
160 		}
161 
162 		link->cpu_of_node = of_parse_phandle(cpu, "sound-dai", 0);
163 		if (!link->cpu_of_node) {
164 			dev_err(card->dev, "error getting cpu phandle\n");
165 			ret = -EINVAL;
166 			goto error;
167 		}
168 
169 		ret = snd_soc_of_get_dai_name(cpu, &link->cpu_dai_name);
170 		if (ret) {
171 			dev_err(card->dev, "error getting cpu dai name\n");
172 			goto error;
173 		}
174 
175 		ret = snd_soc_of_get_dai_link_codecs(dev, codec, link);
176 
177 		if (ret < 0) {
178 			dev_err(card->dev, "error getting codec dai name\n");
179 			goto error;
180 		}
181 
182 		link->platform_of_node = link->cpu_of_node;
183 		ret = of_property_read_string(np, "link-name", &link->name);
184 		if (ret) {
185 			dev_err(card->dev, "error getting codec dai_link name\n");
186 			goto error;
187 		}
188 
189 		link->stream_name = link->name;
190 		link->init = apq8016_sbc_dai_init;
191 		link++;
192 
193 		of_node_put(cpu);
194 		of_node_put(codec);
195 	}
196 
197 	return data;
198 
199  error:
200 	of_node_put(np);
201 	of_node_put(cpu);
202 	of_node_put(codec);
203 	return ERR_PTR(ret);
204 }
205 
206 static const struct snd_soc_dapm_widget apq8016_sbc_dapm_widgets[] = {
207 
208 	SND_SOC_DAPM_MIC("Handset Mic", NULL),
209 	SND_SOC_DAPM_MIC("Headset Mic", NULL),
210 	SND_SOC_DAPM_MIC("Secondary Mic", NULL),
211 	SND_SOC_DAPM_MIC("Digital Mic1", NULL),
212 	SND_SOC_DAPM_MIC("Digital Mic2", NULL),
213 };
214 
215 static int apq8016_sbc_platform_probe(struct platform_device *pdev)
216 {
217 	struct device *dev = &pdev->dev;
218 	struct snd_soc_card *card;
219 	struct apq8016_sbc_data *data;
220 	struct resource *res;
221 
222 	card = devm_kzalloc(dev, sizeof(*card), GFP_KERNEL);
223 	if (!card)
224 		return -ENOMEM;
225 
226 	card->dev = dev;
227 	card->dapm_widgets = apq8016_sbc_dapm_widgets;
228 	card->num_dapm_widgets = ARRAY_SIZE(apq8016_sbc_dapm_widgets);
229 	data = apq8016_sbc_parse_of(card);
230 	if (IS_ERR(data)) {
231 		dev_err(&pdev->dev, "Error resolving dai links: %ld\n",
232 			PTR_ERR(data));
233 		return PTR_ERR(data);
234 	}
235 
236 	res = platform_get_resource_byname(pdev, IORESOURCE_MEM, "mic-iomux");
237 	data->mic_iomux = devm_ioremap_resource(dev, res);
238 	if (IS_ERR(data->mic_iomux))
239 		return PTR_ERR(data->mic_iomux);
240 
241 	res = platform_get_resource_byname(pdev, IORESOURCE_MEM, "spkr-iomux");
242 	data->spkr_iomux = devm_ioremap_resource(dev, res);
243 	if (IS_ERR(data->spkr_iomux))
244 		return PTR_ERR(data->spkr_iomux);
245 
246 	snd_soc_card_set_drvdata(card, data);
247 
248 	return devm_snd_soc_register_card(&pdev->dev, card);
249 }
250 
251 static const struct of_device_id apq8016_sbc_device_id[]  = {
252 	{ .compatible = "qcom,apq8016-sbc-sndcard" },
253 	{},
254 };
255 MODULE_DEVICE_TABLE(of, apq8016_sbc_device_id);
256 
257 static struct platform_driver apq8016_sbc_platform_driver = {
258 	.driver = {
259 		.name = "qcom-apq8016-sbc",
260 		.of_match_table = of_match_ptr(apq8016_sbc_device_id),
261 	},
262 	.probe = apq8016_sbc_platform_probe,
263 };
264 module_platform_driver(apq8016_sbc_platform_driver);
265 
266 MODULE_AUTHOR("Srinivas Kandagatla <srinivas.kandagatla@linaro.org");
267 MODULE_DESCRIPTION("APQ8016 ASoC Machine Driver");
268 MODULE_LICENSE("GPL v2");
269