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1 | /* |
2 | * atmel_wm8904 - Atmel ASoC driver for boards with WM8904 codec. | |
3 | * | |
4 | * Copyright (C) 2012 Atmel | |
5 | * | |
6 | * Author: Bo Shen <voice.shen@atmel.com> | |
7 | * | |
8 | * GPLv2 or later | |
9 | */ | |
10 | ||
11 | #include <linux/clk.h> | |
12 | #include <linux/module.h> | |
13 | #include <linux/of.h> | |
14 | #include <linux/of_device.h> | |
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15 | |
16 | #include <sound/soc.h> | |
17 | ||
18 | #include "../codecs/wm8904.h" | |
19 | #include "atmel_ssc_dai.h" | |
20 | ||
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21 | static const struct snd_soc_dapm_widget atmel_asoc_wm8904_dapm_widgets[] = { |
22 | SND_SOC_DAPM_HP("Headphone Jack", NULL), | |
23 | SND_SOC_DAPM_MIC("Mic", NULL), | |
24 | SND_SOC_DAPM_LINE("Line In Jack", NULL), | |
25 | }; | |
26 | ||
27 | static int atmel_asoc_wm8904_hw_params(struct snd_pcm_substream *substream, | |
28 | struct snd_pcm_hw_params *params) | |
29 | { | |
30 | struct snd_soc_pcm_runtime *rtd = substream->private_data; | |
31 | struct snd_soc_dai *codec_dai = rtd->codec_dai; | |
32 | int ret; | |
33 | ||
34 | ret = snd_soc_dai_set_pll(codec_dai, WM8904_FLL_MCLK, WM8904_FLL_MCLK, | |
35 | 32768, params_rate(params) * 256); | |
36 | if (ret < 0) { | |
37 | pr_err("%s - failed to set wm8904 codec PLL.", __func__); | |
38 | return ret; | |
39 | } | |
40 | ||
41 | /* | |
42 | * As here wm8904 use FLL output as its system clock | |
43 | * so calling set_sysclk won't care freq parameter | |
44 | * then we pass 0 | |
45 | */ | |
46 | ret = snd_soc_dai_set_sysclk(codec_dai, WM8904_CLK_FLL, | |
47 | 0, SND_SOC_CLOCK_IN); | |
48 | if (ret < 0) { | |
49 | pr_err("%s -failed to set wm8904 SYSCLK\n", __func__); | |
50 | return ret; | |
51 | } | |
52 | ||
53 | return 0; | |
54 | } | |
55 | ||
28549313 | 56 | static const struct snd_soc_ops atmel_asoc_wm8904_ops = { |
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57 | .hw_params = atmel_asoc_wm8904_hw_params, |
58 | }; | |
59 | ||
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60 | static struct snd_soc_dai_link atmel_asoc_wm8904_dailink = { |
61 | .name = "WM8904", | |
62 | .stream_name = "WM8904 PCM", | |
63 | .codec_dai_name = "wm8904-hifi", | |
64 | .dai_fmt = SND_SOC_DAIFMT_I2S | |
65 | | SND_SOC_DAIFMT_NB_NF | |
66 | | SND_SOC_DAIFMT_CBM_CFM, | |
67 | .ops = &atmel_asoc_wm8904_ops, | |
68 | }; | |
69 | ||
70 | static struct snd_soc_card atmel_asoc_wm8904_card = { | |
71 | .name = "atmel_asoc_wm8904", | |
72 | .owner = THIS_MODULE, | |
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73 | .dai_link = &atmel_asoc_wm8904_dailink, |
74 | .num_links = 1, | |
75 | .dapm_widgets = atmel_asoc_wm8904_dapm_widgets, | |
76 | .num_dapm_widgets = ARRAY_SIZE(atmel_asoc_wm8904_dapm_widgets), | |
77 | .fully_routed = true, | |
78 | }; | |
79 | ||
80 | static int atmel_asoc_wm8904_dt_init(struct platform_device *pdev) | |
81 | { | |
82 | struct device_node *np = pdev->dev.of_node; | |
83 | struct device_node *codec_np, *cpu_np; | |
84 | struct snd_soc_card *card = &atmel_asoc_wm8904_card; | |
85 | struct snd_soc_dai_link *dailink = &atmel_asoc_wm8904_dailink; | |
86 | int ret; | |
87 | ||
88 | if (!np) { | |
89 | dev_err(&pdev->dev, "only device tree supported\n"); | |
90 | return -EINVAL; | |
91 | } | |
92 | ||
93 | ret = snd_soc_of_parse_card_name(card, "atmel,model"); | |
94 | if (ret) { | |
95 | dev_err(&pdev->dev, "failed to parse card name\n"); | |
96 | return ret; | |
97 | } | |
98 | ||
99 | ret = snd_soc_of_parse_audio_routing(card, "atmel,audio-routing"); | |
100 | if (ret) { | |
101 | dev_err(&pdev->dev, "failed to parse audio routing\n"); | |
102 | return ret; | |
103 | } | |
104 | ||
105 | cpu_np = of_parse_phandle(np, "atmel,ssc-controller", 0); | |
106 | if (!cpu_np) { | |
107 | dev_err(&pdev->dev, "failed to get dai and pcm info\n"); | |
108 | ret = -EINVAL; | |
109 | return ret; | |
110 | } | |
111 | dailink->cpu_of_node = cpu_np; | |
112 | dailink->platform_of_node = cpu_np; | |
113 | of_node_put(cpu_np); | |
114 | ||
115 | codec_np = of_parse_phandle(np, "atmel,audio-codec", 0); | |
116 | if (!codec_np) { | |
117 | dev_err(&pdev->dev, "failed to get codec info\n"); | |
118 | ret = -EINVAL; | |
119 | return ret; | |
120 | } | |
121 | dailink->codec_of_node = codec_np; | |
122 | of_node_put(codec_np); | |
123 | ||
124 | return 0; | |
125 | } | |
126 | ||
127 | static int atmel_asoc_wm8904_probe(struct platform_device *pdev) | |
128 | { | |
129 | struct snd_soc_card *card = &atmel_asoc_wm8904_card; | |
130 | struct snd_soc_dai_link *dailink = &atmel_asoc_wm8904_dailink; | |
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131 | int id, ret; |
132 | ||
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133 | card->dev = &pdev->dev; |
134 | ret = atmel_asoc_wm8904_dt_init(pdev); | |
135 | if (ret) { | |
136 | dev_err(&pdev->dev, "failed to init dt info\n"); | |
137 | return ret; | |
138 | } | |
139 | ||
140 | id = of_alias_get_id((struct device_node *)dailink->cpu_of_node, "ssc"); | |
141 | ret = atmel_ssc_set_audio(id); | |
142 | if (ret != 0) { | |
143 | dev_err(&pdev->dev, "failed to set SSC %d for audio\n", id); | |
144 | return ret; | |
145 | } | |
146 | ||
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147 | ret = snd_soc_register_card(card); |
148 | if (ret) { | |
149 | dev_err(&pdev->dev, "snd_soc_register_card failed\n"); | |
150 | goto err_set_audio; | |
151 | } | |
152 | ||
153 | return 0; | |
154 | ||
155 | err_set_audio: | |
156 | atmel_ssc_put_audio(id); | |
157 | return ret; | |
158 | } | |
159 | ||
160 | static int atmel_asoc_wm8904_remove(struct platform_device *pdev) | |
161 | { | |
162 | struct snd_soc_card *card = platform_get_drvdata(pdev); | |
163 | struct snd_soc_dai_link *dailink = &atmel_asoc_wm8904_dailink; | |
164 | int id; | |
165 | ||
166 | id = of_alias_get_id((struct device_node *)dailink->cpu_of_node, "ssc"); | |
167 | ||
168 | snd_soc_unregister_card(card); | |
169 | atmel_ssc_put_audio(id); | |
170 | ||
171 | return 0; | |
172 | } | |
173 | ||
174 | #ifdef CONFIG_OF | |
175 | static const struct of_device_id atmel_asoc_wm8904_dt_ids[] = { | |
176 | { .compatible = "atmel,asoc-wm8904", }, | |
177 | { } | |
178 | }; | |
aab7826f | 179 | MODULE_DEVICE_TABLE(of, atmel_asoc_wm8904_dt_ids); |
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180 | #endif |
181 | ||
182 | static struct platform_driver atmel_asoc_wm8904_driver = { | |
183 | .driver = { | |
184 | .name = "atmel-wm8904-audio", | |
52f19b14 | 185 | .of_match_table = of_match_ptr(atmel_asoc_wm8904_dt_ids), |
50860e1d | 186 | .pm = &snd_soc_pm_ops, |
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187 | }, |
188 | .probe = atmel_asoc_wm8904_probe, | |
189 | .remove = atmel_asoc_wm8904_remove, | |
190 | }; | |
191 | ||
192 | module_platform_driver(atmel_asoc_wm8904_driver); | |
193 | ||
194 | /* Module information */ | |
195 | MODULE_AUTHOR("Bo Shen <voice.shen@atmel.com>"); | |
196 | MODULE_DESCRIPTION("ALSA SoC machine driver for Atmel EK with WM8904 codec"); | |
197 | MODULE_LICENSE("GPL"); |