xref: /openbmc/linux/sound/soc/samsung/arndale.c (revision 2149a1af)
1 // SPDX-License-Identifier: GPL-2.0+
2 //
3 // Copyright (c) 2014, Insignal Co., Ltd.
4 //
5 //  Author: Claude <claude@insginal.co.kr>
6 
7 #include <linux/module.h>
8 #include <linux/of_device.h>
9 #include <linux/platform_device.h>
10 #include <linux/clk.h>
11 
12 #include <sound/soc.h>
13 #include <sound/soc-dapm.h>
14 #include <sound/pcm.h>
15 #include <sound/pcm_params.h>
16 
17 #include "../codecs/wm8994.h"
18 #include "i2s.h"
19 
arndale_rt5631_hw_params(struct snd_pcm_substream * substream,struct snd_pcm_hw_params * params)20 static int arndale_rt5631_hw_params(struct snd_pcm_substream *substream,
21 				    struct snd_pcm_hw_params *params)
22 {
23 	struct snd_soc_pcm_runtime *rtd = asoc_substream_to_rtd(substream);
24 	struct snd_soc_dai *cpu_dai = asoc_rtd_to_cpu(rtd, 0);
25 	struct snd_soc_dai *codec_dai = asoc_rtd_to_codec(rtd, 0);
26 	int rfs, ret;
27 	unsigned long rclk;
28 
29 	rfs = 256;
30 
31 	rclk = params_rate(params) * rfs;
32 
33 	ret = snd_soc_dai_set_sysclk(cpu_dai, SAMSUNG_I2S_CDCLK,
34 					0, SND_SOC_CLOCK_OUT);
35 	if (ret < 0)
36 		return ret;
37 
38 	ret = snd_soc_dai_set_sysclk(cpu_dai, SAMSUNG_I2S_RCLKSRC_0,
39 					0, SND_SOC_CLOCK_OUT);
40 
41 	if (ret < 0)
42 		return ret;
43 
44 	ret = snd_soc_dai_set_sysclk(codec_dai, 0, rclk, SND_SOC_CLOCK_OUT);
45 	if (ret < 0)
46 		return ret;
47 
48 	return 0;
49 }
50 
51 static const struct snd_soc_ops arndale_rt5631_ops = {
52 	.hw_params = arndale_rt5631_hw_params,
53 };
54 
arndale_wm1811_hw_params(struct snd_pcm_substream * substream,struct snd_pcm_hw_params * params)55 static int arndale_wm1811_hw_params(struct snd_pcm_substream *substream,
56 				    struct snd_pcm_hw_params *params)
57 {
58 	struct snd_soc_pcm_runtime *rtd = asoc_substream_to_rtd(substream);
59 	struct snd_soc_dai *codec_dai = asoc_rtd_to_codec(rtd, 0);
60 	unsigned int rfs, rclk;
61 
62 	/* Ensure AIF1CLK is >= 3 MHz for optimal performance */
63 	if (params_width(params) == 24)
64 		rfs = 384;
65 	else if (params_rate(params) == 8000 || params_rate(params) == 11025)
66 		rfs = 512;
67 	else
68 		rfs = 256;
69 
70 	rclk = params_rate(params) * rfs;
71 
72 	/*
73 	 * We add 1 to the frequency value to ensure proper EPLL setting
74 	 * for each audio sampling rate (see epll_24mhz_tbl in drivers/clk/
75 	 * samsung/clk-exynos5250.c for list of available EPLL rates).
76 	 * The CODEC uses clk API and the value will be rounded hence the MCLK1
77 	 * clock's frequency will still be exact multiple of the sample rate.
78 	 */
79 	return snd_soc_dai_set_sysclk(codec_dai, WM8994_SYSCLK_MCLK1,
80 					rclk + 1, SND_SOC_CLOCK_IN);
81 }
82 
83 static const struct snd_soc_ops arndale_wm1811_ops = {
84 	.hw_params = arndale_wm1811_hw_params,
85 };
86 
87 SND_SOC_DAILINK_DEFS(rt5631_hifi,
88 	DAILINK_COMP_ARRAY(COMP_EMPTY()),
89 	DAILINK_COMP_ARRAY(COMP_CODEC(NULL, "rt5631-aif1")),
90 	DAILINK_COMP_ARRAY(COMP_EMPTY()));
91 
92 static struct snd_soc_dai_link arndale_rt5631_dai[] = {
93 	{
94 		.name = "RT5631 HiFi",
95 		.stream_name = "Primary",
96 		.dai_fmt = SND_SOC_DAIFMT_I2S
97 			| SND_SOC_DAIFMT_NB_NF
98 			| SND_SOC_DAIFMT_CBS_CFS,
99 		.ops = &arndale_rt5631_ops,
100 		SND_SOC_DAILINK_REG(rt5631_hifi),
101 	},
102 };
103 
104 SND_SOC_DAILINK_DEFS(wm1811_hifi,
105 	DAILINK_COMP_ARRAY(COMP_EMPTY()),
106 	DAILINK_COMP_ARRAY(COMP_CODEC(NULL, "wm8994-aif1")),
107 	DAILINK_COMP_ARRAY(COMP_EMPTY()));
108 
109 static struct snd_soc_dai_link arndale_wm1811_dai[] = {
110 	{
111 		.name = "WM1811 HiFi",
112 		.stream_name = "Primary",
113 		.dai_fmt = SND_SOC_DAIFMT_I2S
114 			| SND_SOC_DAIFMT_NB_NF
115 			| SND_SOC_DAIFMT_CBM_CFM,
116 		.ops = &arndale_wm1811_ops,
117 		SND_SOC_DAILINK_REG(wm1811_hifi),
118 	},
119 };
120 
121 static struct snd_soc_card arndale_rt5631 = {
122 	.name = "Arndale RT5631",
123 	.owner = THIS_MODULE,
124 	.dai_link = arndale_rt5631_dai,
125 	.num_links = ARRAY_SIZE(arndale_rt5631_dai),
126 };
127 
128 static struct snd_soc_card arndale_wm1811 = {
129 	.name = "Arndale WM1811",
130 	.owner = THIS_MODULE,
131 	.dai_link = arndale_wm1811_dai,
132 	.num_links = ARRAY_SIZE(arndale_wm1811_dai),
133 };
134 
arndale_put_of_nodes(struct snd_soc_card * card)135 static void arndale_put_of_nodes(struct snd_soc_card *card)
136 {
137 	struct snd_soc_dai_link *dai_link;
138 	int i;
139 
140 	for_each_card_prelinks(card, i, dai_link) {
141 		of_node_put(dai_link->cpus->of_node);
142 		of_node_put(dai_link->codecs->of_node);
143 	}
144 }
145 
arndale_audio_probe(struct platform_device * pdev)146 static int arndale_audio_probe(struct platform_device *pdev)
147 {
148 	struct device_node *np = pdev->dev.of_node;
149 	struct snd_soc_card *card;
150 	struct snd_soc_dai_link *dai_link;
151 	int ret;
152 
153 	card = (struct snd_soc_card *)of_device_get_match_data(&pdev->dev);
154 	card->dev = &pdev->dev;
155 	dai_link = card->dai_link;
156 
157 	dai_link->cpus->of_node = of_parse_phandle(np, "samsung,audio-cpu", 0);
158 	if (!dai_link->cpus->of_node) {
159 		dev_err(&pdev->dev,
160 			"Property 'samsung,audio-cpu' missing or invalid\n");
161 		return -EINVAL;
162 	}
163 
164 	if (!dai_link->platforms->name)
165 		dai_link->platforms->of_node = dai_link->cpus->of_node;
166 
167 	dai_link->codecs->of_node = of_parse_phandle(np, "samsung,audio-codec", 0);
168 	if (!dai_link->codecs->of_node) {
169 		dev_err(&pdev->dev,
170 			"Property 'samsung,audio-codec' missing or invalid\n");
171 		ret = -EINVAL;
172 		goto err_put_of_nodes;
173 	}
174 
175 	ret = devm_snd_soc_register_card(card->dev, card);
176 	if (ret) {
177 		dev_err_probe(&pdev->dev, ret,
178 			      "snd_soc_register_card() failed\n");
179 		goto err_put_of_nodes;
180 	}
181 	return 0;
182 
183 err_put_of_nodes:
184 	arndale_put_of_nodes(card);
185 	return ret;
186 }
187 
arndale_audio_remove(struct platform_device * pdev)188 static void arndale_audio_remove(struct platform_device *pdev)
189 {
190 	struct snd_soc_card *card = platform_get_drvdata(pdev);
191 
192 	arndale_put_of_nodes(card);
193 }
194 
195 static const struct of_device_id arndale_audio_of_match[] = {
196 	{ .compatible = "samsung,arndale-rt5631",  .data = &arndale_rt5631 },
197 	{ .compatible = "samsung,arndale-alc5631", .data = &arndale_rt5631 },
198 	{ .compatible = "samsung,arndale-wm1811",  .data = &arndale_wm1811 },
199 	{},
200 };
201 MODULE_DEVICE_TABLE(of, arndale_audio_of_match);
202 
203 static struct platform_driver arndale_audio_driver = {
204 	.driver = {
205 		.name = "arndale-audio",
206 		.pm = &snd_soc_pm_ops,
207 		.of_match_table = arndale_audio_of_match,
208 	},
209 	.probe = arndale_audio_probe,
210 	.remove_new = arndale_audio_remove,
211 };
212 
213 module_platform_driver(arndale_audio_driver);
214 
215 MODULE_AUTHOR("Claude <claude@insignal.co.kr>");
216 MODULE_DESCRIPTION("ALSA SoC Driver for Arndale Board");
217 MODULE_LICENSE("GPL");
218