This source file includes following definitions.
- sam9x5_wm8731_init
- sam9x5_wm8731_driver_probe
- sam9x5_wm8731_driver_remove
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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
34 struct sam9x5_drvdata {
35 int ssc_id;
36 };
37
38
39
40
41 static int sam9x5_wm8731_init(struct snd_soc_pcm_runtime *rtd)
42 {
43 struct snd_soc_dai *codec_dai = rtd->codec_dai;
44 struct device *dev = rtd->dev;
45 int ret;
46
47 dev_dbg(dev, "%s called\n", __func__);
48
49
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
62
63
64
65
66
67
68 static 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
73 static 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_CBM_CFM;
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;
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;
157 }
158
159 of_node_put(codec_np);
160 of_node_put(cpu_np);
161
162 ret = snd_soc_register_card(card);
163 if (ret) {
164 dev_err(&pdev->dev, "Platform device allocation failed\n");
165 goto out_put_audio;
166 }
167
168 dev_dbg(&pdev->dev, "%s ok\n", __func__);
169
170 return ret;
171
172 out_put_audio:
173 atmel_ssc_put_audio(priv->ssc_id);
174 out:
175 return ret;
176 }
177
178 static int sam9x5_wm8731_driver_remove(struct platform_device *pdev)
179 {
180 struct snd_soc_card *card = platform_get_drvdata(pdev);
181 struct sam9x5_drvdata *priv = card->drvdata;
182
183 snd_soc_unregister_card(card);
184 atmel_ssc_put_audio(priv->ssc_id);
185
186 return 0;
187 }
188
189 static const struct of_device_id sam9x5_wm8731_of_match[] = {
190 { .compatible = "atmel,sam9x5-wm8731-audio", },
191 {},
192 };
193 MODULE_DEVICE_TABLE(of, sam9x5_wm8731_of_match);
194
195 static struct platform_driver sam9x5_wm8731_driver = {
196 .driver = {
197 .name = DRV_NAME,
198 .of_match_table = of_match_ptr(sam9x5_wm8731_of_match),
199 },
200 .probe = sam9x5_wm8731_driver_probe,
201 .remove = sam9x5_wm8731_driver_remove,
202 };
203 module_platform_driver(sam9x5_wm8731_driver);
204
205
206 MODULE_AUTHOR("Nicolas Ferre <nicolas.ferre@atmel.com>");
207 MODULE_AUTHOR("Richard Genoud <richard.genoud@gmail.com>");
208 MODULE_DESCRIPTION("ALSA SoC machine driver for AT91SAM9x5 - WM8731");
209 MODULE_LICENSE("GPL");
210 MODULE_ALIAS("platform:" DRV_NAME);