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10#include <linux/clk.h>
11#include <linux/module.h>
12#include <linux/of.h>
13#include <linux/of_device.h>
14
15#include <sound/soc.h>
16
17#include "../codecs/wm8904.h"
18#include "atmel_ssc_dai.h"
19
20static const struct snd_soc_dapm_widget atmel_asoc_wm8904_dapm_widgets[] = {
21 SND_SOC_DAPM_HP("Headphone Jack", NULL),
22 SND_SOC_DAPM_MIC("Mic", NULL),
23 SND_SOC_DAPM_LINE("Line In Jack", NULL),
24};
25
26static int atmel_asoc_wm8904_hw_params(struct snd_pcm_substream *substream,
27 struct snd_pcm_hw_params *params)
28{
29 struct snd_soc_pcm_runtime *rtd = asoc_substream_to_rtd(substream);
30 struct snd_soc_dai *codec_dai = asoc_rtd_to_codec(rtd, 0);
31 int ret;
32
33 ret = snd_soc_dai_set_pll(codec_dai, WM8904_FLL_MCLK, WM8904_FLL_MCLK,
34 32768, params_rate(params) * 256);
35 if (ret < 0) {
36 pr_err("%s - failed to set wm8904 codec PLL.", __func__);
37 return ret;
38 }
39
40
41
42
43
44
45 ret = snd_soc_dai_set_sysclk(codec_dai, WM8904_CLK_FLL,
46 0, SND_SOC_CLOCK_IN);
47 if (ret < 0) {
48 pr_err("%s -failed to set wm8904 SYSCLK\n", __func__);
49 return ret;
50 }
51
52 return 0;
53}
54
55static const struct snd_soc_ops atmel_asoc_wm8904_ops = {
56 .hw_params = atmel_asoc_wm8904_hw_params,
57};
58
59SND_SOC_DAILINK_DEFS(pcm,
60 DAILINK_COMP_ARRAY(COMP_EMPTY()),
61 DAILINK_COMP_ARRAY(COMP_CODEC(NULL, "wm8904-hifi")),
62 DAILINK_COMP_ARRAY(COMP_EMPTY()));
63
64static struct snd_soc_dai_link atmel_asoc_wm8904_dailink = {
65 .name = "WM8904",
66 .stream_name = "WM8904 PCM",
67 .dai_fmt = SND_SOC_DAIFMT_I2S
68 | SND_SOC_DAIFMT_NB_NF
69 | SND_SOC_DAIFMT_CBM_CFM,
70 .ops = &atmel_asoc_wm8904_ops,
71 SND_SOC_DAILINK_REG(pcm),
72};
73
74static struct snd_soc_card atmel_asoc_wm8904_card = {
75 .name = "atmel_asoc_wm8904",
76 .owner = THIS_MODULE,
77 .dai_link = &atmel_asoc_wm8904_dailink,
78 .num_links = 1,
79 .dapm_widgets = atmel_asoc_wm8904_dapm_widgets,
80 .num_dapm_widgets = ARRAY_SIZE(atmel_asoc_wm8904_dapm_widgets),
81 .fully_routed = true,
82};
83
84static int atmel_asoc_wm8904_dt_init(struct platform_device *pdev)
85{
86 struct device_node *np = pdev->dev.of_node;
87 struct device_node *codec_np, *cpu_np;
88 struct snd_soc_card *card = &atmel_asoc_wm8904_card;
89 struct snd_soc_dai_link *dailink = &atmel_asoc_wm8904_dailink;
90 int ret;
91
92 if (!np) {
93 dev_err(&pdev->dev, "only device tree supported\n");
94 return -EINVAL;
95 }
96
97 ret = snd_soc_of_parse_card_name(card, "atmel,model");
98 if (ret) {
99 dev_err(&pdev->dev, "failed to parse card name\n");
100 return ret;
101 }
102
103 ret = snd_soc_of_parse_audio_routing(card, "atmel,audio-routing");
104 if (ret) {
105 dev_err(&pdev->dev, "failed to parse audio routing\n");
106 return ret;
107 }
108
109 cpu_np = of_parse_phandle(np, "atmel,ssc-controller", 0);
110 if (!cpu_np) {
111 dev_err(&pdev->dev, "failed to get dai and pcm info\n");
112 ret = -EINVAL;
113 return ret;
114 }
115 dailink->cpus->of_node = cpu_np;
116 dailink->platforms->of_node = cpu_np;
117 of_node_put(cpu_np);
118
119 codec_np = of_parse_phandle(np, "atmel,audio-codec", 0);
120 if (!codec_np) {
121 dev_err(&pdev->dev, "failed to get codec info\n");
122 ret = -EINVAL;
123 return ret;
124 }
125 dailink->codecs->of_node = codec_np;
126 of_node_put(codec_np);
127
128 return 0;
129}
130
131static int atmel_asoc_wm8904_probe(struct platform_device *pdev)
132{
133 struct snd_soc_card *card = &atmel_asoc_wm8904_card;
134 struct snd_soc_dai_link *dailink = &atmel_asoc_wm8904_dailink;
135 int id, ret;
136
137 card->dev = &pdev->dev;
138 ret = atmel_asoc_wm8904_dt_init(pdev);
139 if (ret) {
140 dev_err(&pdev->dev, "failed to init dt info\n");
141 return ret;
142 }
143
144 id = of_alias_get_id((struct device_node *)dailink->cpus->of_node, "ssc");
145 ret = atmel_ssc_set_audio(id);
146 if (ret != 0) {
147 dev_err(&pdev->dev, "failed to set SSC %d for audio\n", id);
148 return ret;
149 }
150
151 ret = snd_soc_register_card(card);
152 if (ret) {
153 dev_err(&pdev->dev, "snd_soc_register_card failed\n");
154 goto err_set_audio;
155 }
156
157 return 0;
158
159err_set_audio:
160 atmel_ssc_put_audio(id);
161 return ret;
162}
163
164static int atmel_asoc_wm8904_remove(struct platform_device *pdev)
165{
166 struct snd_soc_card *card = platform_get_drvdata(pdev);
167 struct snd_soc_dai_link *dailink = &atmel_asoc_wm8904_dailink;
168 int id;
169
170 id = of_alias_get_id((struct device_node *)dailink->cpus->of_node, "ssc");
171
172 snd_soc_unregister_card(card);
173 atmel_ssc_put_audio(id);
174
175 return 0;
176}
177
178#ifdef CONFIG_OF
179static const struct of_device_id atmel_asoc_wm8904_dt_ids[] = {
180 { .compatible = "atmel,asoc-wm8904", },
181 { }
182};
183MODULE_DEVICE_TABLE(of, atmel_asoc_wm8904_dt_ids);
184#endif
185
186static struct platform_driver atmel_asoc_wm8904_driver = {
187 .driver = {
188 .name = "atmel-wm8904-audio",
189 .of_match_table = of_match_ptr(atmel_asoc_wm8904_dt_ids),
190 .pm = &snd_soc_pm_ops,
191 },
192 .probe = atmel_asoc_wm8904_probe,
193 .remove = atmel_asoc_wm8904_remove,
194};
195
196module_platform_driver(atmel_asoc_wm8904_driver);
197
198
199MODULE_AUTHOR("Bo Shen <voice.shen@atmel.com>");
200MODULE_DESCRIPTION("ALSA SoC machine driver for Atmel EK with WM8904 codec");
201MODULE_LICENSE("GPL");
202
