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1// SPDX-License-Identifier: GPL-2.0-or-later
2/*
3 * sam9x5_wm8731 -- SoC audio for AT91SAM9X5-based boards
4 * that are using WM8731 as codec.
5 *
6 * Copyright (C) 2011 Atmel,
7 * Nicolas Ferre <nicolas.ferre@atmel.com>
8 *
9 * Copyright (C) 2013 Paratronic,
10 * Richard Genoud <richard.genoud@gmail.com>
11 *
12 * Based on sam9g20_wm8731.c by:
13 * Sedji Gaouaou <sedji.gaouaou@atmel.com>
14 */
15#include <linux/of.h>
16#include <linux/export.h>
17#include <linux/module.h>
18#include <linux/mod_devicetable.h>
19#include <linux/platform_device.h>
20#include <linux/device.h>
21
22#include <sound/soc.h>
23#include <sound/soc-dai.h>
24#include <sound/soc-dapm.h>
25
26#include "../codecs/wm8731.h"
27#include "atmel_ssc_dai.h"
28
29
30#define MCLK_RATE 12288000
31
32#define DRV_NAME "sam9x5-snd-wm8731"
33
34struct sam9x5_drvdata {
35 int ssc_id;
36};
37
38/*
39 * Logic for a wm8731 as connected on a at91sam9x5ek based board.
40 */
41static int sam9x5_wm8731_init(struct snd_soc_pcm_runtime *rtd)
42{
43 struct snd_soc_dai *codec_dai = snd_soc_rtd_to_codec(rtd, 0);
44 struct device *dev = rtd->dev;
45 int ret;
46
47 dev_dbg(dev, "%s called\n", __func__);
48
49 /* set the codec system clock for DAC and ADC */
50 ret = snd_soc_dai_set_sysclk(codec_dai, WM8731_SYSCLK_XTAL,
51 MCLK_RATE, SND_SOC_CLOCK_IN);
52 if (ret < 0) {
53 dev_err(dev, "Failed to set WM8731 SYSCLK: %d\n", ret);
54 return ret;
55 }
56
57 return 0;
58}
59
60/*
61 * Audio paths on at91sam9x5ek board:
62 *
63 * |A| ------------> | | ---R----> Headphone Jack
64 * |T| <----\ | WM | ---L--/
65 * |9| ---> CLK <--> | 8731 | <--R----- Line In Jack
66 * |1| <------------ | | <--L--/
67 */
68static const struct snd_soc_dapm_widget sam9x5_dapm_widgets[] = {
69 SND_SOC_DAPM_HP("Headphone Jack", NULL),
70 SND_SOC_DAPM_LINE("Line In Jack", NULL),
71};
72
73static int sam9x5_wm8731_driver_probe(struct platform_device *pdev)
74{
75 struct device_node *np = pdev->dev.of_node;
76 struct device_node *codec_np, *cpu_np;
77 struct snd_soc_card *card;
78 struct snd_soc_dai_link *dai;
79 struct sam9x5_drvdata *priv;
80 struct snd_soc_dai_link_component *comp;
81 int ret;
82
83 if (!np) {
84 dev_err(&pdev->dev, "No device node supplied\n");
85 return -EINVAL;
86 }
87
88 card = devm_kzalloc(&pdev->dev, sizeof(*card), GFP_KERNEL);
89 priv = devm_kzalloc(&pdev->dev, sizeof(*priv), GFP_KERNEL);
90 dai = devm_kzalloc(&pdev->dev, sizeof(*dai), GFP_KERNEL);
91 comp = devm_kzalloc(&pdev->dev, 3 * sizeof(*comp), GFP_KERNEL);
92 if (!dai || !card || !priv || !comp) {
93 ret = -ENOMEM;
94 goto out;
95 }
96
97 snd_soc_card_set_drvdata(card, priv);
98
99 card->dev = &pdev->dev;
100 card->owner = THIS_MODULE;
101 card->dai_link = dai;
102 card->num_links = 1;
103 card->dapm_widgets = sam9x5_dapm_widgets;
104 card->num_dapm_widgets = ARRAY_SIZE(sam9x5_dapm_widgets);
105
106 dai->cpus = &comp[0];
107 dai->num_cpus = 1;
108 dai->codecs = &comp[1];
109 dai->num_codecs = 1;
110 dai->platforms = &comp[2];
111 dai->num_platforms = 1;
112
113 dai->name = "WM8731";
114 dai->stream_name = "WM8731 PCM";
115 dai->codecs->dai_name = "wm8731-hifi";
116 dai->init = sam9x5_wm8731_init;
117 dai->dai_fmt = SND_SOC_DAIFMT_DSP_A | SND_SOC_DAIFMT_NB_NF
118 | SND_SOC_DAIFMT_CBP_CFP;
119
120 ret = snd_soc_of_parse_card_name(card, "atmel,model");
121 if (ret) {
122 dev_err(&pdev->dev, "atmel,model node missing\n");
123 goto out;
124 }
125
126 ret = snd_soc_of_parse_audio_routing(card, "atmel,audio-routing");
127 if (ret) {
128 dev_err(&pdev->dev, "atmel,audio-routing node missing\n");
129 goto out;
130 }
131
132 codec_np = of_parse_phandle(np, "atmel,audio-codec", 0);
133 if (!codec_np) {
134 dev_err(&pdev->dev, "atmel,audio-codec node missing\n");
135 ret = -EINVAL;
136 goto out;
137 }
138
139 dai->codecs->of_node = codec_np;
140
141 cpu_np = of_parse_phandle(np, "atmel,ssc-controller", 0);
142 if (!cpu_np) {
143 dev_err(&pdev->dev, "atmel,ssc-controller node missing\n");
144 ret = -EINVAL;
145 goto out_put_codec_np;
146 }
147 dai->cpus->of_node = cpu_np;
148 dai->platforms->of_node = cpu_np;
149
150 priv->ssc_id = of_alias_get_id(cpu_np, "ssc");
151
152 ret = atmel_ssc_set_audio(priv->ssc_id);
153 if (ret != 0) {
154 dev_err(&pdev->dev, "Failed to set SSC %d for audio: %d\n",
155 ret, priv->ssc_id);
156 goto out_put_cpu_np;
157 }
158
159 ret = devm_snd_soc_register_card(&pdev->dev, card);
160 if (ret) {
161 dev_err(&pdev->dev, "Platform device allocation failed\n");
162 goto out_put_audio;
163 }
164
165 dev_dbg(&pdev->dev, "%s ok\n", __func__);
166
167 goto out_put_cpu_np;
168
169out_put_audio:
170 atmel_ssc_put_audio(priv->ssc_id);
171out_put_cpu_np:
172 of_node_put(cpu_np);
173out_put_codec_np:
174 of_node_put(codec_np);
175out:
176 return ret;
177}
178
179static void sam9x5_wm8731_driver_remove(struct platform_device *pdev)
180{
181 struct snd_soc_card *card = platform_get_drvdata(pdev);
182 struct sam9x5_drvdata *priv = card->drvdata;
183
184 atmel_ssc_put_audio(priv->ssc_id);
185}
186
187static const struct of_device_id sam9x5_wm8731_of_match[] = {
188 { .compatible = "atmel,sam9x5-wm8731-audio", },
189 {},
190};
191MODULE_DEVICE_TABLE(of, sam9x5_wm8731_of_match);
192
193static struct platform_driver sam9x5_wm8731_driver = {
194 .driver = {
195 .name = DRV_NAME,
196 .of_match_table = of_match_ptr(sam9x5_wm8731_of_match),
197 },
198 .probe = sam9x5_wm8731_driver_probe,
199 .remove = sam9x5_wm8731_driver_remove,
200};
201module_platform_driver(sam9x5_wm8731_driver);
202
203/* Module information */
204MODULE_AUTHOR("Nicolas Ferre <nicolas.ferre@atmel.com>");
205MODULE_AUTHOR("Richard Genoud <richard.genoud@gmail.com>");
206MODULE_DESCRIPTION("ALSA SoC machine driver for AT91SAM9x5 - WM8731");
207MODULE_LICENSE("GPL");
208MODULE_ALIAS("platform:" DRV_NAME);
1/*
2 * sam9x5_wm8731 -- SoC audio for AT91SAM9X5-based boards
3 * that are using WM8731 as codec.
4 *
5 * Copyright (C) 2011 Atmel,
6 * Nicolas Ferre <nicolas.ferre@atmel.com>
7 *
8 * Copyright (C) 2013 Paratronic,
9 * Richard Genoud <richard.genoud@gmail.com>
10 *
11 * Based on sam9g20_wm8731.c by:
12 * Sedji Gaouaou <sedji.gaouaou@atmel.com>
13 *
14 * This program is free software; you can redistribute it and/or modify it
15 * under the terms of the GNU General Public License as published by the
16 * Free Software Foundation; either version 2 of the License, or (at your
17 * option) any later version.
18 *
19 */
20#include <linux/of.h>
21#include <linux/export.h>
22#include <linux/module.h>
23#include <linux/mod_devicetable.h>
24#include <linux/platform_device.h>
25#include <linux/device.h>
26
27#include <sound/soc.h>
28#include <sound/soc-dai.h>
29#include <sound/soc-dapm.h>
30
31#include "../codecs/wm8731.h"
32#include "atmel_ssc_dai.h"
33
34
35#define MCLK_RATE 12288000
36
37#define DRV_NAME "sam9x5-snd-wm8731"
38
39struct sam9x5_drvdata {
40 int ssc_id;
41};
42
43/*
44 * Logic for a wm8731 as connected on a at91sam9x5ek based board.
45 */
46static int sam9x5_wm8731_init(struct snd_soc_pcm_runtime *rtd)
47{
48 struct snd_soc_dai *codec_dai = rtd->codec_dai;
49 struct device *dev = rtd->dev;
50 int ret;
51
52 dev_dbg(dev, "ASoC: %s called\n", __func__);
53
54 /* set the codec system clock for DAC and ADC */
55 ret = snd_soc_dai_set_sysclk(codec_dai, WM8731_SYSCLK_XTAL,
56 MCLK_RATE, SND_SOC_CLOCK_IN);
57 if (ret < 0) {
58 dev_err(dev, "ASoC: Failed to set WM8731 SYSCLK: %d\n", ret);
59 return ret;
60 }
61
62 return 0;
63}
64
65/*
66 * Audio paths on at91sam9x5ek board:
67 *
68 * |A| ------------> | | ---R----> Headphone Jack
69 * |T| <----\ | WM | ---L--/
70 * |9| ---> CLK <--> | 8731 | <--R----- Line In Jack
71 * |1| <------------ | | <--L--/
72 */
73static const struct snd_soc_dapm_widget sam9x5_dapm_widgets[] = {
74 SND_SOC_DAPM_HP("Headphone Jack", NULL),
75 SND_SOC_DAPM_LINE("Line In Jack", NULL),
76};
77
78static int sam9x5_wm8731_driver_probe(struct platform_device *pdev)
79{
80 struct device_node *np = pdev->dev.of_node;
81 struct device_node *codec_np, *cpu_np;
82 struct snd_soc_card *card;
83 struct snd_soc_dai_link *dai;
84 struct sam9x5_drvdata *priv;
85 int ret;
86
87 if (!np) {
88 dev_err(&pdev->dev, "No device node supplied\n");
89 return -EINVAL;
90 }
91
92 card = devm_kzalloc(&pdev->dev, sizeof(*card), GFP_KERNEL);
93 priv = devm_kzalloc(&pdev->dev, sizeof(*priv), GFP_KERNEL);
94 dai = devm_kzalloc(&pdev->dev, sizeof(*dai), GFP_KERNEL);
95 if (!dai || !card || !priv) {
96 ret = -ENOMEM;
97 goto out;
98 }
99
100 snd_soc_card_set_drvdata(card, priv);
101
102 card->dev = &pdev->dev;
103 card->owner = THIS_MODULE;
104 card->dai_link = dai;
105 card->num_links = 1;
106 card->dapm_widgets = sam9x5_dapm_widgets;
107 card->num_dapm_widgets = ARRAY_SIZE(sam9x5_dapm_widgets);
108 dai->name = "WM8731";
109 dai->stream_name = "WM8731 PCM";
110 dai->codec_dai_name = "wm8731-hifi";
111 dai->init = sam9x5_wm8731_init;
112 dai->dai_fmt = SND_SOC_DAIFMT_DSP_A | SND_SOC_DAIFMT_NB_NF
113 | SND_SOC_DAIFMT_CBM_CFM;
114
115 ret = snd_soc_of_parse_card_name(card, "atmel,model");
116 if (ret) {
117 dev_err(&pdev->dev, "atmel,model node missing\n");
118 goto out;
119 }
120
121 ret = snd_soc_of_parse_audio_routing(card, "atmel,audio-routing");
122 if (ret) {
123 dev_err(&pdev->dev, "atmel,audio-routing node missing\n");
124 goto out;
125 }
126
127 codec_np = of_parse_phandle(np, "atmel,audio-codec", 0);
128 if (!codec_np) {
129 dev_err(&pdev->dev, "atmel,audio-codec node missing\n");
130 ret = -EINVAL;
131 goto out;
132 }
133
134 dai->codec_of_node = codec_np;
135
136 cpu_np = of_parse_phandle(np, "atmel,ssc-controller", 0);
137 if (!cpu_np) {
138 dev_err(&pdev->dev, "atmel,ssc-controller node missing\n");
139 ret = -EINVAL;
140 goto out;
141 }
142 dai->cpu_of_node = cpu_np;
143 dai->platform_of_node = cpu_np;
144
145 priv->ssc_id = of_alias_get_id(cpu_np, "ssc");
146
147 ret = atmel_ssc_set_audio(priv->ssc_id);
148 if (ret != 0) {
149 dev_err(&pdev->dev,
150 "ASoC: Failed to set SSC %d for audio: %d\n",
151 ret, priv->ssc_id);
152 goto out;
153 }
154
155 of_node_put(codec_np);
156 of_node_put(cpu_np);
157
158 ret = snd_soc_register_card(card);
159 if (ret) {
160 dev_err(&pdev->dev,
161 "ASoC: Platform device allocation failed\n");
162 goto out_put_audio;
163 }
164
165 dev_dbg(&pdev->dev, "ASoC: %s ok\n", __func__);
166
167 return ret;
168
169out_put_audio:
170 atmel_ssc_put_audio(priv->ssc_id);
171out:
172 return ret;
173}
174
175static int sam9x5_wm8731_driver_remove(struct platform_device *pdev)
176{
177 struct snd_soc_card *card = platform_get_drvdata(pdev);
178 struct sam9x5_drvdata *priv = card->drvdata;
179
180 snd_soc_unregister_card(card);
181 atmel_ssc_put_audio(priv->ssc_id);
182
183 return 0;
184}
185
186static const struct of_device_id sam9x5_wm8731_of_match[] = {
187 { .compatible = "atmel,sam9x5-wm8731-audio", },
188 {},
189};
190MODULE_DEVICE_TABLE(of, sam9x5_wm8731_of_match);
191
192static struct platform_driver sam9x5_wm8731_driver = {
193 .driver = {
194 .name = DRV_NAME,
195 .owner = THIS_MODULE,
196 .of_match_table = of_match_ptr(sam9x5_wm8731_of_match),
197 },
198 .probe = sam9x5_wm8731_driver_probe,
199 .remove = sam9x5_wm8731_driver_remove,
200};
201module_platform_driver(sam9x5_wm8731_driver);
202
203/* Module information */
204MODULE_AUTHOR("Nicolas Ferre <nicolas.ferre@atmel.com>");
205MODULE_AUTHOR("Richard Genoud <richard.genoud@gmail.com>");
206MODULE_DESCRIPTION("ALSA SoC machine driver for AT91SAM9x5 - WM8731");
207MODULE_LICENSE("GPL");
208MODULE_ALIAS("platform:" DRV_NAME);