1 | // SPDX-License-Identifier: GPL-2.0-or-later |
2 | /* |
3 | * sam9x5_wm8731 -- SoC audio for AT91SAM9X5-based boards |
4 | * that are using WM8731 as codec. |
5 | * |
6 | * Copyright (C) 2011 Atmel, |
7 | * Nicolas Ferre <nicolas.ferre@atmel.com> |
8 | * |
9 | * Copyright (C) 2013 Paratronic, |
10 | * Richard Genoud <richard.genoud@gmail.com> |
11 | * |
12 | * Based on sam9g20_wm8731.c by: |
13 | * Sedji Gaouaou <sedji.gaouaou@atmel.com> |
14 | */ |
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 | * Logic for a wm8731 as connected on a at91sam9x5ek based board. |
40 | */ |
41 | static int sam9x5_wm8731_init(struct snd_soc_pcm_runtime *rtd) |
42 | { |
43 | struct snd_soc_dai *codec_dai = snd_soc_rtd_to_codec(rtd, 0); |
44 | struct device *dev = rtd->dev; |
45 | int ret; |
46 | |
47 | dev_dbg(dev, "%s called\n" , __func__); |
48 | |
49 | /* set the codec system clock for DAC and ADC */ |
50 | ret = snd_soc_dai_set_sysclk(dai: 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 | * Audio paths on at91sam9x5ek board: |
62 | * |
63 | * |A| ------------> | | ---R----> Headphone Jack |
64 | * |T| <----\ | WM | ---L--/ |
65 | * |9| ---> CLK <--> | 8731 | <--R----- Line In Jack |
66 | * |1| <------------ | | <--L--/ |
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(dev: &pdev->dev, size: sizeof(*card), GFP_KERNEL); |
89 | priv = devm_kzalloc(dev: &pdev->dev, size: sizeof(*priv), GFP_KERNEL); |
90 | dai = devm_kzalloc(dev: &pdev->dev, size: sizeof(*dai), GFP_KERNEL); |
91 | comp = devm_kzalloc(dev: &pdev->dev, size: 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, data: 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_CBP_CFP; |
119 | |
120 | ret = snd_soc_of_parse_card_name(card, propname: "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, propname: "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, phandle_name: "atmel,audio-codec" , index: 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, phandle_name: "atmel,ssc-controller" , index: 0); |
142 | if (!cpu_np) { |
143 | dev_err(&pdev->dev, "atmel,ssc-controller node missing\n" ); |
144 | ret = -EINVAL; |
145 | goto out_put_codec_np; |
146 | } |
147 | dai->cpus->of_node = cpu_np; |
148 | dai->platforms->of_node = cpu_np; |
149 | |
150 | priv->ssc_id = of_alias_get_id(np: cpu_np, stem: "ssc" ); |
151 | |
152 | ret = atmel_ssc_set_audio(ssc_id: 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_put_cpu_np; |
157 | } |
158 | |
159 | ret = devm_snd_soc_register_card(dev: &pdev->dev, card); |
160 | if (ret) { |
161 | dev_err(&pdev->dev, "Platform device allocation failed\n" ); |
162 | goto out_put_audio; |
163 | } |
164 | |
165 | dev_dbg(&pdev->dev, "%s ok\n" , __func__); |
166 | |
167 | goto out_put_cpu_np; |
168 | |
169 | out_put_audio: |
170 | atmel_ssc_put_audio(ssc_id: priv->ssc_id); |
171 | out_put_cpu_np: |
172 | of_node_put(node: cpu_np); |
173 | out_put_codec_np: |
174 | of_node_put(node: codec_np); |
175 | out: |
176 | return ret; |
177 | } |
178 | |
179 | static void sam9x5_wm8731_driver_remove(struct platform_device *pdev) |
180 | { |
181 | struct snd_soc_card *card = platform_get_drvdata(pdev); |
182 | struct sam9x5_drvdata *priv = card->drvdata; |
183 | |
184 | atmel_ssc_put_audio(ssc_id: priv->ssc_id); |
185 | } |
186 | |
187 | static const struct of_device_id sam9x5_wm8731_of_match[] = { |
188 | { .compatible = "atmel,sam9x5-wm8731-audio" , }, |
189 | {}, |
190 | }; |
191 | MODULE_DEVICE_TABLE(of, sam9x5_wm8731_of_match); |
192 | |
193 | static struct platform_driver sam9x5_wm8731_driver = { |
194 | .driver = { |
195 | .name = DRV_NAME, |
196 | .of_match_table = of_match_ptr(sam9x5_wm8731_of_match), |
197 | }, |
198 | .probe = sam9x5_wm8731_driver_probe, |
199 | .remove_new = sam9x5_wm8731_driver_remove, |
200 | }; |
201 | module_platform_driver(sam9x5_wm8731_driver); |
202 | |
203 | /* Module information */ |
204 | MODULE_AUTHOR("Nicolas Ferre <nicolas.ferre@atmel.com>" ); |
205 | MODULE_AUTHOR("Richard Genoud <richard.genoud@gmail.com>" ); |
206 | MODULE_DESCRIPTION("ALSA SoC machine driver for AT91SAM9x5 - WM8731" ); |
207 | MODULE_LICENSE("GPL" ); |
208 | MODULE_ALIAS("platform:" DRV_NAME); |
209 | |