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.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
20static 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 = snd_soc_substream_to_rtd(substream);
24 struct snd_soc_dai *cpu_dai = snd_soc_rtd_to_cpu(rtd, 0);
25 struct snd_soc_dai *codec_dai = snd_soc_rtd_to_codec(rtd, 0);
26 int rfs, ret;
27 unsigned long rclk;
28
29 rfs = 256;
30
31 rclk = params_rate(p: params) * rfs;
32
33 ret = snd_soc_dai_set_sysclk(dai: cpu_dai, SAMSUNG_I2S_CDCLK,
34 freq: 0, SND_SOC_CLOCK_OUT);
35 if (ret < 0)
36 return ret;
37
38 ret = snd_soc_dai_set_sysclk(dai: cpu_dai, SAMSUNG_I2S_RCLKSRC_0,
39 freq: 0, SND_SOC_CLOCK_OUT);
40
41 if (ret < 0)
42 return ret;
43
44 ret = snd_soc_dai_set_sysclk(dai: codec_dai, clk_id: 0, freq: rclk, SND_SOC_CLOCK_OUT);
45 if (ret < 0)
46 return ret;
47
48 return 0;
49}
50
51static const struct snd_soc_ops arndale_rt5631_ops = {
52 .hw_params = arndale_rt5631_hw_params,
53};
54
55static 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 = snd_soc_substream_to_rtd(substream);
59 struct snd_soc_dai *codec_dai = snd_soc_rtd_to_codec(rtd, 0);
60 unsigned int rfs, rclk;
61
62 /* Ensure AIF1CLK is >= 3 MHz for optimal performance */
63 if (params_width(p: params) == 24)
64 rfs = 384;
65 else if (params_rate(p: params) == 8000 || params_rate(p: params) == 11025)
66 rfs = 512;
67 else
68 rfs = 256;
69
70 rclk = params_rate(p: 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(dai: codec_dai, WM8994_SYSCLK_MCLK1,
80 freq: rclk + 1, SND_SOC_CLOCK_IN);
81}
82
83static const struct snd_soc_ops arndale_wm1811_ops = {
84 .hw_params = arndale_wm1811_hw_params,
85};
86
87SND_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
92static 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_CBC_CFC,
99 .ops = &arndale_rt5631_ops,
100 SND_SOC_DAILINK_REG(rt5631_hifi),
101 },
102};
103
104SND_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
109static 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_CBP_CFP,
116 .ops = &arndale_wm1811_ops,
117 SND_SOC_DAILINK_REG(wm1811_hifi),
118 },
119};
120
121static 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
128static 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
135static 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(node: dai_link->cpus->of_node);
142 of_node_put(node: dai_link->codecs->of_node);
143 }
144}
145
146static 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(dev: &pdev->dev);
154 card->dev = &pdev->dev;
155 dai_link = card->dai_link;
156
157 dai_link->cpus->of_node = of_parse_phandle(np, phandle_name: "samsung,audio-cpu", index: 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, phandle_name: "samsung,audio-codec", index: 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(dev: card->dev, card);
176 if (ret) {
177 dev_err_probe(dev: &pdev->dev, err: ret,
178 fmt: "snd_soc_register_card() failed\n");
179 goto err_put_of_nodes;
180 }
181 return 0;
182
183err_put_of_nodes:
184 arndale_put_of_nodes(card);
185 return ret;
186}
187
188static 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
195static 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};
201MODULE_DEVICE_TABLE(of, arndale_audio_of_match);
202
203static 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 = arndale_audio_remove,
211};
212
213module_platform_driver(arndale_audio_driver);
214
215MODULE_AUTHOR("Claude <claude@insignal.co.kr>");
216MODULE_DESCRIPTION("ALSA SoC Driver for Arndale Board");
217MODULE_LICENSE("GPL");
218

source code of linux/sound/soc/samsung/arndale.c