1 // SPDX-License-Identifier: GPL-2.0-only
2 /*
3  * Rockchip machine ASoC driver for RK3288 boards that have an HDMI and analog
4  * audio output
5  *
6  * Copyright (c) 2016, Collabora Ltd.
7  *
8  * Authors: Sjoerd Simons <sjoerd.simons@collabora.com>,
9  *	    Romain Perier <romain.perier@collabora.com>
10  */
11 
12 #include <linux/module.h>
13 #include <linux/platform_device.h>
14 #include <linux/slab.h>
15 #include <linux/gpio/consumer.h>
16 #include <sound/core.h>
17 #include <sound/jack.h>
18 #include <sound/pcm.h>
19 #include <sound/pcm_params.h>
20 #include <sound/soc.h>
21 #include <sound/soc-dapm.h>
22 
23 #include "rockchip_i2s.h"
24 
25 #define DRV_NAME "rk3288-snd-hdmi-analog"
26 
27 struct rk_drvdata {
28 	struct gpio_desc *gpio_hp_en;
29 };
30 
rk_hp_power(struct snd_soc_dapm_widget * w,struct snd_kcontrol * k,int event)31 static int rk_hp_power(struct snd_soc_dapm_widget *w,
32 		       struct snd_kcontrol *k, int event)
33 {
34 	struct rk_drvdata *machine = snd_soc_card_get_drvdata(w->dapm->card);
35 
36 	gpiod_set_value_cansleep(machine->gpio_hp_en,
37 				 SND_SOC_DAPM_EVENT_ON(event));
38 
39 	return 0;
40 }
41 
42 static struct snd_soc_jack headphone_jack;
43 static struct snd_soc_jack_pin headphone_jack_pins[] = {
44 	{
45 		.pin = "Analog",
46 		.mask = SND_JACK_HEADPHONE
47 	},
48 };
49 
50 static const struct snd_soc_dapm_widget rk_dapm_widgets[] = {
51 	SND_SOC_DAPM_HP("Analog", rk_hp_power),
52 	SND_SOC_DAPM_LINE("HDMI", NULL),
53 };
54 
55 static const struct snd_kcontrol_new rk_mc_controls[] = {
56 	SOC_DAPM_PIN_SWITCH("Analog"),
57 	SOC_DAPM_PIN_SWITCH("HDMI"),
58 };
59 
rk_hw_params(struct snd_pcm_substream * substream,struct snd_pcm_hw_params * params)60 static int rk_hw_params(struct snd_pcm_substream *substream,
61 			struct snd_pcm_hw_params *params)
62 {
63 	int ret = 0;
64 	struct snd_soc_pcm_runtime *rtd = snd_soc_substream_to_rtd(substream);
65 	struct snd_soc_dai *cpu_dai = snd_soc_rtd_to_cpu(rtd, 0);
66 	struct snd_soc_dai *codec_dai = snd_soc_rtd_to_codec(rtd, 0);
67 	int mclk;
68 
69 	switch (params_rate(params)) {
70 	case 8000:
71 	case 16000:
72 	case 24000:
73 	case 32000:
74 	case 48000:
75 	case 64000:
76 	case 96000:
77 		mclk = 12288000;
78 		break;
79 	case 192000:
80 		mclk = 24576000;
81 		break;
82 	case 11025:
83 	case 22050:
84 	case 44100:
85 	case 88200:
86 		mclk = 11289600;
87 		break;
88 	default:
89 		return -EINVAL;
90 	}
91 
92 	ret = snd_soc_dai_set_sysclk(cpu_dai, 0, mclk,
93 				     SND_SOC_CLOCK_OUT);
94 
95 	if (ret && ret != -ENOTSUPP) {
96 		dev_err(codec_dai->dev, "Can't set cpu clock %d\n", ret);
97 		return ret;
98 	}
99 
100 	ret = snd_soc_dai_set_sysclk(codec_dai, 0, mclk,
101 				     SND_SOC_CLOCK_IN);
102 	if (ret && ret != -ENOTSUPP) {
103 		dev_err(codec_dai->dev, "Can't set codec clock %d\n", ret);
104 		return ret;
105 	}
106 
107 	return 0;
108 }
109 
110 static struct snd_soc_jack_gpio rk_hp_jack_gpio = {
111 	.name = "rockchip,hp-det",
112 	.report = SND_JACK_HEADPHONE,
113 	.debounce_time = 150
114 };
115 
rk_init(struct snd_soc_pcm_runtime * runtime)116 static int rk_init(struct snd_soc_pcm_runtime *runtime)
117 {
118 	struct snd_soc_card *card = runtime->card;
119 	struct device *dev = card->dev;
120 
121 	/* Enable optional Headset Jack detection */
122 	if (of_property_present(dev->of_node, "rockchip,hp-det-gpios")) {
123 		rk_hp_jack_gpio.gpiod_dev = dev;
124 		snd_soc_card_jack_new_pins(runtime->card, "Headphone Jack",
125 					   SND_JACK_HEADPHONE, &headphone_jack,
126 					   headphone_jack_pins,
127 					   ARRAY_SIZE(headphone_jack_pins));
128 		snd_soc_jack_add_gpios(&headphone_jack, 1, &rk_hp_jack_gpio);
129 	}
130 
131 	return 0;
132 }
133 
134 static const struct snd_soc_ops rk_ops = {
135 	.hw_params = rk_hw_params,
136 };
137 
138 SND_SOC_DAILINK_DEFS(audio,
139 	DAILINK_COMP_ARRAY(COMP_EMPTY()),
140 	DAILINK_COMP_ARRAY(COMP_CODEC(NULL, NULL),
141 			   COMP_CODEC("hdmi-audio-codec.2.auto", "i2s-hifi")),
142 	DAILINK_COMP_ARRAY(COMP_EMPTY()));
143 
144 static struct snd_soc_dai_link rk_dailink = {
145 	.name = "Codecs",
146 	.stream_name = "Audio",
147 	.init = rk_init,
148 	.ops = &rk_ops,
149 	/* Set codecs as slave */
150 	.dai_fmt = SND_SOC_DAIFMT_I2S | SND_SOC_DAIFMT_NB_NF |
151 		SND_SOC_DAIFMT_CBS_CFS,
152 	SND_SOC_DAILINK_REG(audio),
153 };
154 
155 static struct snd_soc_card snd_soc_card_rk = {
156 	.name = "ROCKCHIP-I2S",
157 	.dai_link = &rk_dailink,
158 	.num_links = 1,
159 	.num_aux_devs = 0,
160 	.dapm_widgets = rk_dapm_widgets,
161 	.num_dapm_widgets = ARRAY_SIZE(rk_dapm_widgets),
162 	.controls = rk_mc_controls,
163 	.num_controls = ARRAY_SIZE(rk_mc_controls),
164 };
165 
snd_rk_mc_probe(struct platform_device * pdev)166 static int snd_rk_mc_probe(struct platform_device *pdev)
167 {
168 	int ret;
169 	struct snd_soc_card *card = &snd_soc_card_rk;
170 	struct device_node *np = pdev->dev.of_node;
171 	struct rk_drvdata *machine;
172 	struct of_phandle_args args;
173 
174 	machine = devm_kzalloc(&pdev->dev, sizeof(struct rk_drvdata),
175 			       GFP_KERNEL);
176 	if (!machine)
177 		return -ENOMEM;
178 
179 	card->dev = &pdev->dev;
180 
181 	machine->gpio_hp_en = devm_gpiod_get_optional(&pdev->dev, "rockchip,hp-en", GPIOD_OUT_LOW);
182 	if (IS_ERR(machine->gpio_hp_en))
183 		return PTR_ERR(machine->gpio_hp_en);
184 	gpiod_set_consumer_name(machine->gpio_hp_en, "hp_en");
185 
186 	ret = snd_soc_of_parse_card_name(card, "rockchip,model");
187 	if (ret) {
188 		dev_err(card->dev, "SoC parse card name failed %d\n", ret);
189 		return ret;
190 	}
191 
192 	rk_dailink.codecs[0].of_node = of_parse_phandle(np,
193 							"rockchip,audio-codec",
194 							0);
195 	if (!rk_dailink.codecs[0].of_node) {
196 		dev_err(&pdev->dev,
197 			"Property 'rockchip,audio-codec' missing or invalid\n");
198 		return -EINVAL;
199 	}
200 	ret = of_parse_phandle_with_fixed_args(np, "rockchip,audio-codec",
201 					       0, 0, &args);
202 	if (ret) {
203 		dev_err(&pdev->dev,
204 			"Unable to parse property 'rockchip,audio-codec'\n");
205 		return ret;
206 	}
207 
208 	ret = snd_soc_get_dai_name(&args, &rk_dailink.codecs[0].dai_name);
209 	if (ret) {
210 		dev_err(&pdev->dev, "Unable to get codec_dai_name\n");
211 		return ret;
212 	}
213 
214 	rk_dailink.cpus->of_node = of_parse_phandle(np, "rockchip,i2s-controller",
215 						  0);
216 	if (!rk_dailink.cpus->of_node) {
217 		dev_err(&pdev->dev,
218 			"Property 'rockchip,i2s-controller' missing or invalid\n");
219 		return -EINVAL;
220 	}
221 
222 	rk_dailink.platforms->of_node = rk_dailink.cpus->of_node;
223 
224 	ret = snd_soc_of_parse_audio_routing(card, "rockchip,routing");
225 	if (ret) {
226 		dev_err(&pdev->dev,
227 			"Unable to parse 'rockchip,routing' property\n");
228 		return ret;
229 	}
230 
231 	snd_soc_card_set_drvdata(card, machine);
232 
233 	ret = devm_snd_soc_register_card(&pdev->dev, card);
234 	if (ret)
235 		return dev_err_probe(&pdev->dev, ret,
236 				     "Soc register card failed\n");
237 
238 	return 0;
239 }
240 
241 static const struct of_device_id rockchip_sound_of_match[] = {
242 	{ .compatible = "rockchip,rk3288-hdmi-analog", },
243 	{},
244 };
245 
246 MODULE_DEVICE_TABLE(of, rockchip_sound_of_match);
247 
248 static struct platform_driver rockchip_sound_driver = {
249 	.probe = snd_rk_mc_probe,
250 	.driver = {
251 		.name = DRV_NAME,
252 		.pm = &snd_soc_pm_ops,
253 		.of_match_table = rockchip_sound_of_match,
254 	},
255 };
256 
257 module_platform_driver(rockchip_sound_driver);
258 
259 MODULE_AUTHOR("Sjoerd Simons <sjoerd.simons@collabora.com>");
260 MODULE_DESCRIPTION("Rockchip RK3288 machine ASoC driver");
261 MODULE_LICENSE("GPL v2");
262 MODULE_ALIAS("platform:" DRV_NAME);
263