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fdbcb3cb NF |
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 | ||
39 | struct sam9x5_drvdata { | |
40 | int ssc_id; | |
41 | }; | |
42 | ||
43 | /* | |
44 | * Logic for a wm8731 as connected on a at91sam9x5ek based board. | |
45 | */ | |
46 | static 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 | */ | |
73 | static 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 | ||
78 | static 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 | ||
46bec25d BS |
100 | snd_soc_card_set_drvdata(card, priv); |
101 | ||
fdbcb3cb NF |
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; | |
bc567a93 | 112 | dai->dai_fmt = SND_SOC_DAIFMT_DSP_A | SND_SOC_DAIFMT_NB_NF |
fdbcb3cb 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 | ||
fdbcb3cb NF |
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 | ||
169 | out_put_audio: | |
170 | atmel_ssc_put_audio(priv->ssc_id); | |
171 | out: | |
172 | return ret; | |
173 | } | |
174 | ||
175 | static 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 | ||
186 | static const struct of_device_id sam9x5_wm8731_of_match[] = { | |
187 | { .compatible = "atmel,sam9x5-wm8731-audio", }, | |
188 | {}, | |
189 | }; | |
190 | MODULE_DEVICE_TABLE(of, sam9x5_wm8731_of_match); | |
191 | ||
192 | static struct platform_driver sam9x5_wm8731_driver = { | |
193 | .driver = { | |
194 | .name = DRV_NAME, | |
fdbcb3cb NF |
195 | .of_match_table = of_match_ptr(sam9x5_wm8731_of_match), |
196 | }, | |
197 | .probe = sam9x5_wm8731_driver_probe, | |
198 | .remove = sam9x5_wm8731_driver_remove, | |
199 | }; | |
200 | module_platform_driver(sam9x5_wm8731_driver); | |
201 | ||
202 | /* Module information */ | |
203 | MODULE_AUTHOR("Nicolas Ferre <nicolas.ferre@atmel.com>"); | |
204 | MODULE_AUTHOR("Richard Genoud <richard.genoud@gmail.com>"); | |
205 | MODULE_DESCRIPTION("ALSA SoC machine driver for AT91SAM9x5 - WM8731"); | |
206 | MODULE_LICENSE("GPL"); | |
207 | MODULE_ALIAS("platform:" DRV_NAME); |