1 | // SPDX-License-Identifier: GPL-2.0+ |
2 | // |
3 | // Copyright (C) 2013 Freescale Semiconductor, Inc. |
4 | |
5 | #include <linux/module.h> |
6 | #include <linux/of_platform.h> |
7 | #include <sound/soc.h> |
8 | |
9 | struct imx_spdif_data { |
10 | struct snd_soc_dai_link dai; |
11 | struct snd_soc_card card; |
12 | }; |
13 | |
14 | static int imx_spdif_audio_probe(struct platform_device *pdev) |
15 | { |
16 | struct device_node *spdif_np, *np = pdev->dev.of_node; |
17 | struct imx_spdif_data *data; |
18 | struct snd_soc_dai_link_component *comp; |
19 | int ret = 0; |
20 | |
21 | spdif_np = of_parse_phandle(np, phandle_name: "spdif-controller" , index: 0); |
22 | if (!spdif_np) { |
23 | dev_err(&pdev->dev, "failed to find spdif-controller\n" ); |
24 | ret = -EINVAL; |
25 | goto end; |
26 | } |
27 | |
28 | data = devm_kzalloc(dev: &pdev->dev, size: sizeof(*data), GFP_KERNEL); |
29 | comp = devm_kzalloc(dev: &pdev->dev, size: sizeof(*comp), GFP_KERNEL); |
30 | if (!data || !comp) { |
31 | ret = -ENOMEM; |
32 | goto end; |
33 | } |
34 | |
35 | /* |
36 | * CPU == Platform |
37 | * platform is using soc-generic-dmaengine-pcm |
38 | */ |
39 | data->dai.cpus = |
40 | data->dai.platforms = comp; |
41 | data->dai.codecs = &snd_soc_dummy_dlc; |
42 | |
43 | data->dai.num_cpus = 1; |
44 | data->dai.num_codecs = 1; |
45 | data->dai.num_platforms = 1; |
46 | |
47 | data->dai.name = "S/PDIF PCM" ; |
48 | data->dai.stream_name = "S/PDIF PCM" ; |
49 | data->dai.cpus->of_node = spdif_np; |
50 | data->dai.playback_only = true; |
51 | data->dai.capture_only = true; |
52 | |
53 | if (of_property_read_bool(np, propname: "spdif-out" )) |
54 | data->dai.capture_only = false; |
55 | |
56 | if (of_property_read_bool(np, propname: "spdif-in" )) |
57 | data->dai.playback_only = false; |
58 | |
59 | if (data->dai.playback_only && data->dai.capture_only) { |
60 | dev_err(&pdev->dev, "no enabled S/PDIF DAI link\n" ); |
61 | goto end; |
62 | } |
63 | |
64 | data->card.dev = &pdev->dev; |
65 | data->card.dai_link = &data->dai; |
66 | data->card.num_links = 1; |
67 | data->card.owner = THIS_MODULE; |
68 | |
69 | ret = snd_soc_of_parse_card_name(card: &data->card, propname: "model" ); |
70 | if (ret) |
71 | goto end; |
72 | |
73 | ret = devm_snd_soc_register_card(dev: &pdev->dev, card: &data->card); |
74 | if (ret) |
75 | dev_err_probe(dev: &pdev->dev, err: ret, fmt: "snd_soc_register_card failed\n" ); |
76 | |
77 | end: |
78 | of_node_put(node: spdif_np); |
79 | |
80 | return ret; |
81 | } |
82 | |
83 | static const struct of_device_id imx_spdif_dt_ids[] = { |
84 | { .compatible = "fsl,imx-audio-spdif" , }, |
85 | { /* sentinel */ } |
86 | }; |
87 | MODULE_DEVICE_TABLE(of, imx_spdif_dt_ids); |
88 | |
89 | static struct platform_driver imx_spdif_driver = { |
90 | .driver = { |
91 | .name = "imx-spdif" , |
92 | .pm = &snd_soc_pm_ops, |
93 | .of_match_table = imx_spdif_dt_ids, |
94 | }, |
95 | .probe = imx_spdif_audio_probe, |
96 | }; |
97 | |
98 | module_platform_driver(imx_spdif_driver); |
99 | |
100 | MODULE_AUTHOR("Freescale Semiconductor, Inc." ); |
101 | MODULE_DESCRIPTION("Freescale i.MX S/PDIF machine driver" ); |
102 | MODULE_LICENSE("GPL v2" ); |
103 | MODULE_ALIAS("platform:imx-spdif" ); |
104 | |