1 | // SPDX-License-Identifier: GPL-2.0-or-later |
2 | /* |
3 | * atmel_wm8904 - Atmel ASoC driver for boards with WM8904 codec. |
4 | * |
5 | * Copyright (C) 2012 Atmel |
6 | * |
7 | * Author: Bo Shen <voice.shen@atmel.com> |
8 | */ |
9 | |
10 | #include <linux/clk.h> |
11 | #include <linux/module.h> |
12 | #include <linux/of.h> |
13 | |
14 | #include <sound/soc.h> |
15 | |
16 | #include "../codecs/wm8904.h" |
17 | #include "atmel_ssc_dai.h" |
18 | |
19 | static const struct snd_soc_dapm_widget atmel_asoc_wm8904_dapm_widgets[] = { |
20 | SND_SOC_DAPM_HP("Headphone Jack" , NULL), |
21 | SND_SOC_DAPM_MIC("Mic" , NULL), |
22 | SND_SOC_DAPM_LINE("Line In Jack" , NULL), |
23 | }; |
24 | |
25 | static int atmel_asoc_wm8904_hw_params(struct snd_pcm_substream *substream, |
26 | struct snd_pcm_hw_params *params) |
27 | { |
28 | struct snd_soc_pcm_runtime *rtd = snd_soc_substream_to_rtd(substream); |
29 | struct snd_soc_dai *codec_dai = snd_soc_rtd_to_codec(rtd, 0); |
30 | int ret; |
31 | |
32 | ret = snd_soc_dai_set_pll(dai: codec_dai, WM8904_FLL_MCLK, WM8904_FLL_MCLK, |
33 | freq_in: 32768, freq_out: params_rate(p: params) * 256); |
34 | if (ret < 0) { |
35 | pr_err("%s - failed to set wm8904 codec PLL." , __func__); |
36 | return ret; |
37 | } |
38 | |
39 | /* |
40 | * As here wm8904 use FLL output as its system clock |
41 | * so calling set_sysclk won't care freq parameter |
42 | * then we pass 0 |
43 | */ |
44 | ret = snd_soc_dai_set_sysclk(dai: codec_dai, WM8904_CLK_FLL, |
45 | freq: 0, SND_SOC_CLOCK_IN); |
46 | if (ret < 0) { |
47 | pr_err("%s -failed to set wm8904 SYSCLK\n" , __func__); |
48 | return ret; |
49 | } |
50 | |
51 | return 0; |
52 | } |
53 | |
54 | static const struct snd_soc_ops atmel_asoc_wm8904_ops = { |
55 | .hw_params = atmel_asoc_wm8904_hw_params, |
56 | }; |
57 | |
58 | SND_SOC_DAILINK_DEFS(pcm, |
59 | DAILINK_COMP_ARRAY(COMP_EMPTY()), |
60 | DAILINK_COMP_ARRAY(COMP_CODEC(NULL, "wm8904-hifi" )), |
61 | DAILINK_COMP_ARRAY(COMP_EMPTY())); |
62 | |
63 | static struct snd_soc_dai_link atmel_asoc_wm8904_dailink = { |
64 | .name = "WM8904" , |
65 | .stream_name = "WM8904 PCM" , |
66 | .dai_fmt = SND_SOC_DAIFMT_I2S |
67 | | SND_SOC_DAIFMT_NB_NF |
68 | | SND_SOC_DAIFMT_CBP_CFP, |
69 | .ops = &atmel_asoc_wm8904_ops, |
70 | SND_SOC_DAILINK_REG(pcm), |
71 | }; |
72 | |
73 | static struct snd_soc_card atmel_asoc_wm8904_card = { |
74 | .name = "atmel_asoc_wm8904" , |
75 | .owner = THIS_MODULE, |
76 | .dai_link = &atmel_asoc_wm8904_dailink, |
77 | .num_links = 1, |
78 | .dapm_widgets = atmel_asoc_wm8904_dapm_widgets, |
79 | .num_dapm_widgets = ARRAY_SIZE(atmel_asoc_wm8904_dapm_widgets), |
80 | .fully_routed = true, |
81 | }; |
82 | |
83 | static int atmel_asoc_wm8904_dt_init(struct platform_device *pdev) |
84 | { |
85 | struct device_node *np = pdev->dev.of_node; |
86 | struct device_node *codec_np, *cpu_np; |
87 | struct snd_soc_card *card = &atmel_asoc_wm8904_card; |
88 | struct snd_soc_dai_link *dailink = &atmel_asoc_wm8904_dailink; |
89 | int ret; |
90 | |
91 | if (!np) { |
92 | dev_err(&pdev->dev, "only device tree supported\n" ); |
93 | return -EINVAL; |
94 | } |
95 | |
96 | ret = snd_soc_of_parse_card_name(card, propname: "atmel,model" ); |
97 | if (ret) { |
98 | dev_err(&pdev->dev, "failed to parse card name\n" ); |
99 | return ret; |
100 | } |
101 | |
102 | ret = snd_soc_of_parse_audio_routing(card, propname: "atmel,audio-routing" ); |
103 | if (ret) { |
104 | dev_err(&pdev->dev, "failed to parse audio routing\n" ); |
105 | return ret; |
106 | } |
107 | |
108 | cpu_np = of_parse_phandle(np, phandle_name: "atmel,ssc-controller" , index: 0); |
109 | if (!cpu_np) { |
110 | dev_err(&pdev->dev, "failed to get dai and pcm info\n" ); |
111 | ret = -EINVAL; |
112 | return ret; |
113 | } |
114 | dailink->cpus->of_node = cpu_np; |
115 | dailink->platforms->of_node = cpu_np; |
116 | of_node_put(node: cpu_np); |
117 | |
118 | codec_np = of_parse_phandle(np, phandle_name: "atmel,audio-codec" , index: 0); |
119 | if (!codec_np) { |
120 | dev_err(&pdev->dev, "failed to get codec info\n" ); |
121 | ret = -EINVAL; |
122 | return ret; |
123 | } |
124 | dailink->codecs->of_node = codec_np; |
125 | of_node_put(node: codec_np); |
126 | |
127 | return 0; |
128 | } |
129 | |
130 | static int atmel_asoc_wm8904_probe(struct platform_device *pdev) |
131 | { |
132 | struct snd_soc_card *card = &atmel_asoc_wm8904_card; |
133 | struct snd_soc_dai_link *dailink = &atmel_asoc_wm8904_dailink; |
134 | int id, ret; |
135 | |
136 | card->dev = &pdev->dev; |
137 | ret = atmel_asoc_wm8904_dt_init(pdev); |
138 | if (ret) { |
139 | dev_err(&pdev->dev, "failed to init dt info\n" ); |
140 | return ret; |
141 | } |
142 | |
143 | id = of_alias_get_id(np: (struct device_node *)dailink->cpus->of_node, stem: "ssc" ); |
144 | ret = atmel_ssc_set_audio(ssc_id: id); |
145 | if (ret != 0) { |
146 | dev_err(&pdev->dev, "failed to set SSC %d for audio\n" , id); |
147 | return ret; |
148 | } |
149 | |
150 | ret = snd_soc_register_card(card); |
151 | if (ret) { |
152 | dev_err(&pdev->dev, "snd_soc_register_card failed\n" ); |
153 | goto err_set_audio; |
154 | } |
155 | |
156 | return 0; |
157 | |
158 | err_set_audio: |
159 | atmel_ssc_put_audio(ssc_id: id); |
160 | return ret; |
161 | } |
162 | |
163 | static void atmel_asoc_wm8904_remove(struct platform_device *pdev) |
164 | { |
165 | struct snd_soc_card *card = platform_get_drvdata(pdev); |
166 | struct snd_soc_dai_link *dailink = &atmel_asoc_wm8904_dailink; |
167 | int id; |
168 | |
169 | id = of_alias_get_id(np: (struct device_node *)dailink->cpus->of_node, stem: "ssc" ); |
170 | |
171 | snd_soc_unregister_card(card); |
172 | atmel_ssc_put_audio(ssc_id: id); |
173 | } |
174 | |
175 | #ifdef CONFIG_OF |
176 | static const struct of_device_id atmel_asoc_wm8904_dt_ids[] = { |
177 | { .compatible = "atmel,asoc-wm8904" , }, |
178 | { } |
179 | }; |
180 | MODULE_DEVICE_TABLE(of, atmel_asoc_wm8904_dt_ids); |
181 | #endif |
182 | |
183 | static struct platform_driver atmel_asoc_wm8904_driver = { |
184 | .driver = { |
185 | .name = "atmel-wm8904-audio" , |
186 | .of_match_table = of_match_ptr(atmel_asoc_wm8904_dt_ids), |
187 | .pm = &snd_soc_pm_ops, |
188 | }, |
189 | .probe = atmel_asoc_wm8904_probe, |
190 | .remove_new = atmel_asoc_wm8904_remove, |
191 | }; |
192 | |
193 | module_platform_driver(atmel_asoc_wm8904_driver); |
194 | |
195 | /* Module information */ |
196 | MODULE_AUTHOR("Bo Shen <voice.shen@atmel.com>" ); |
197 | MODULE_DESCRIPTION("ALSA SoC machine driver for Atmel EK with WM8904 codec" ); |
198 | MODULE_LICENSE("GPL" ); |
199 | |