0c0b00e40646657b4592d2b646f183d76d456442
[sfrench/cifs-2.6.git] / sound / soc / samsung / odroid.c
1 /*
2  * Copyright (C) 2017 Samsung Electronics Co., Ltd.
3  *
4  * This program is free software; you can redistribute it and/or modify
5  * it under the terms of the GNU General Public License version 2 as
6  * published by the Free Software Foundation.
7  */
8
9 #include <linux/clk.h>
10 #include <linux/of.h>
11 #include <linux/of_device.h>
12 #include <linux/module.h>
13 #include <sound/soc.h>
14 #include <sound/pcm_params.h>
15 #include "i2s.h"
16 #include "i2s-regs.h"
17
18 struct odroid_priv {
19         struct snd_soc_card card;
20         struct snd_soc_dai_link dai_link;
21
22         struct clk *pll;
23         struct clk *rclk;
24 };
25
26 static int odroid_card_startup(struct snd_pcm_substream *substream)
27 {
28         struct snd_pcm_runtime *runtime = substream->runtime;
29
30         snd_pcm_hw_constraint_single(runtime, SNDRV_PCM_HW_PARAM_CHANNELS, 2);
31         return 0;
32 }
33
34 static int odroid_card_hw_params(struct snd_pcm_substream *substream,
35                                       struct snd_pcm_hw_params *params)
36 {
37         struct snd_soc_pcm_runtime *rtd = substream->private_data;
38         struct odroid_priv *priv = snd_soc_card_get_drvdata(rtd->card);
39         unsigned int pll_freq, rclk_freq;
40         int ret;
41
42         switch (params_rate(params)) {
43         case 32000:
44         case 64000:
45                 pll_freq = 131072000U;
46                 break;
47         case 44100:
48         case 88200:
49         case 176400:
50                 pll_freq = 180633600U;
51                 break;
52         case 48000:
53         case 96000:
54         case 192000:
55                 pll_freq = 196608000U;
56                 break;
57         default:
58                 return -EINVAL;
59         }
60
61         ret = clk_set_rate(priv->pll, pll_freq + 1);
62         if (ret < 0)
63                 return ret;
64
65         rclk_freq = params_rate(params) * 256 * 4;
66
67         ret = clk_set_rate(priv->rclk, rclk_freq);
68         if (ret < 0)
69                 return ret;
70
71         if (rtd->num_codecs > 1) {
72                 struct snd_soc_dai *codec_dai = rtd->codec_dais[1];
73
74                 ret = snd_soc_dai_set_sysclk(codec_dai, 0, rclk_freq,
75                                              SND_SOC_CLOCK_IN);
76                 if (ret < 0)
77                         return ret;
78         }
79
80         return 0;
81 }
82
83 static const struct snd_soc_ops odroid_card_ops = {
84         .startup = odroid_card_startup,
85         .hw_params = odroid_card_hw_params,
86 };
87
88 static void odroid_put_codec_of_nodes(struct snd_soc_dai_link *link)
89 {
90         struct snd_soc_dai_link_component *component = link->codecs;
91         int i;
92
93         for (i = 0; i < link->num_codecs; i++, component++) {
94                 if (!component->of_node)
95                         break;
96                 of_node_put(component->of_node);
97         }
98 }
99
100 static int odroid_audio_probe(struct platform_device *pdev)
101 {
102         struct device *dev = &pdev->dev;
103         struct device_node *cpu, *codec;
104         struct odroid_priv *priv;
105         struct snd_soc_dai_link *link;
106         struct snd_soc_card *card;
107         int ret;
108
109         priv = devm_kzalloc(dev, sizeof(*priv), GFP_KERNEL);
110         if (!priv)
111                 return -ENOMEM;
112
113         card = &priv->card;
114         card->dev = dev;
115
116         card->owner = THIS_MODULE;
117         card->fully_routed = true;
118
119         snd_soc_card_set_drvdata(card, priv);
120
121         priv->pll = devm_clk_get(dev, "epll");
122         if (IS_ERR(priv->pll))
123                 return PTR_ERR(priv->pll);
124
125         priv->rclk = devm_clk_get(dev, "i2s_rclk");
126         if (IS_ERR(priv->rclk))
127                 return PTR_ERR(priv->rclk);
128
129         ret = snd_soc_of_parse_card_name(card, "model");
130         if (ret < 0)
131                 return ret;
132
133         if (of_property_read_bool(dev->of_node, "samsung,audio-widgets")) {
134                 ret = snd_soc_of_parse_audio_simple_widgets(card,
135                                                 "samsung,audio-widgets");
136                 if (ret < 0)
137                         return ret;
138         }
139
140         if (of_property_read_bool(dev->of_node, "samsung,audio-routing")) {
141                 ret = snd_soc_of_parse_audio_routing(card,
142                                                 "samsung,audio-routing");
143                 if (ret < 0)
144                         return ret;
145         }
146
147         link = &priv->dai_link;
148
149         link->ops = &odroid_card_ops;
150         link->dai_fmt = SND_SOC_DAIFMT_I2S | SND_SOC_DAIFMT_NB_NF |
151                         SND_SOC_DAIFMT_CBS_CFS;
152
153         card->dai_link = &priv->dai_link;
154         card->num_links = 1;
155
156         cpu = of_get_child_by_name(dev->of_node, "cpu");
157         codec = of_get_child_by_name(dev->of_node, "codec");
158
159         link->cpu_of_node = of_parse_phandle(cpu, "sound-dai", 0);
160         if (!link->cpu_of_node) {
161                 dev_err(dev, "Failed parsing cpu/sound-dai property\n");
162                 return -EINVAL;
163         }
164
165         ret = snd_soc_of_get_dai_link_codecs(dev, codec, link);
166         if (ret < 0)
167                 goto err_put_codec_n;
168
169         link->platform_of_node = link->cpu_of_node;
170
171         link->name = "Primary";
172         link->stream_name = link->name;
173
174         ret = devm_snd_soc_register_card(dev, card);
175         if (ret < 0) {
176                 dev_err(dev, "snd_soc_register_card() failed: %d\n", ret);
177                 goto err_put_i2s_n;
178         }
179
180         return 0;
181
182 err_put_i2s_n:
183         of_node_put(link->cpu_of_node);
184 err_put_codec_n:
185         odroid_put_codec_of_nodes(link);
186         return ret;
187 }
188
189 static int odroid_audio_remove(struct platform_device *pdev)
190 {
191         struct odroid_priv *priv = platform_get_drvdata(pdev);
192
193         of_node_put(priv->dai_link.cpu_of_node);
194         odroid_put_codec_of_nodes(&priv->dai_link);
195
196         return 0;
197 }
198
199 static const struct of_device_id odroid_audio_of_match[] = {
200         { .compatible   = "samsung,odroid-xu3-audio" },
201         { .compatible   = "samsung,odroid-xu4-audio"},
202         { },
203 };
204 MODULE_DEVICE_TABLE(of, odroid_audio_of_match);
205
206 static struct platform_driver odroid_audio_driver = {
207         .driver = {
208                 .name           = "odroid-audio",
209                 .of_match_table = odroid_audio_of_match,
210                 .pm             = &snd_soc_pm_ops,
211         },
212         .probe  = odroid_audio_probe,
213         .remove = odroid_audio_remove,
214 };
215 module_platform_driver(odroid_audio_driver);
216
217 MODULE_AUTHOR("Sylwester Nawrocki <s.nawrocki@samsung.com>");
218 MODULE_DESCRIPTION("Odroid XU3/XU4 audio support");
219 MODULE_LICENSE("GPL v2");