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2a956ec0 NC |
1 | /* |
2 | * Copyright (C) 2013 Freescale Semiconductor, Inc. | |
3 | * | |
4 | * The code contained herein is licensed under the GNU General Public | |
5 | * License. You may obtain a copy of the GNU General Public License | |
6 | * Version 2 or later at the following locations: | |
7 | * | |
8 | * http://www.opensource.org/licenses/gpl-license.html | |
9 | * http://www.gnu.org/copyleft/gpl.html | |
10 | */ | |
11 | ||
12 | #include <linux/module.h> | |
13 | #include <linux/of_platform.h> | |
14 | #include <sound/soc.h> | |
15 | ||
16 | struct imx_spdif_data { | |
14c3aa98 | 17 | struct snd_soc_dai_link dai; |
2a956ec0 | 18 | struct snd_soc_card card; |
2a956ec0 NC |
19 | }; |
20 | ||
21 | static int imx_spdif_audio_probe(struct platform_device *pdev) | |
22 | { | |
23 | struct device_node *spdif_np, *np = pdev->dev.of_node; | |
24 | struct imx_spdif_data *data; | |
14c3aa98 | 25 | int ret = 0; |
2a956ec0 NC |
26 | |
27 | spdif_np = of_parse_phandle(np, "spdif-controller", 0); | |
28 | if (!spdif_np) { | |
29 | dev_err(&pdev->dev, "failed to find spdif-controller\n"); | |
30 | ret = -EINVAL; | |
31 | goto end; | |
32 | } | |
33 | ||
34 | data = devm_kzalloc(&pdev->dev, sizeof(*data), GFP_KERNEL); | |
35 | if (!data) { | |
2a956ec0 NC |
36 | ret = -ENOMEM; |
37 | goto end; | |
38 | } | |
39 | ||
14c3aa98 NC |
40 | data->dai.name = "S/PDIF PCM"; |
41 | data->dai.stream_name = "S/PDIF PCM"; | |
42 | data->dai.codec_dai_name = "snd-soc-dummy-dai"; | |
43 | data->dai.codec_name = "snd-soc-dummy"; | |
44 | data->dai.cpu_of_node = spdif_np; | |
45 | data->dai.platform_of_node = spdif_np; | |
46 | data->dai.playback_only = true; | |
47 | data->dai.capture_only = true; | |
2a956ec0 | 48 | |
14c3aa98 NC |
49 | if (of_property_read_bool(np, "spdif-out")) |
50 | data->dai.capture_only = false; | |
51 | ||
52 | if (of_property_read_bool(np, "spdif-in")) | |
53 | data->dai.playback_only = false; | |
2a956ec0 | 54 | |
14c3aa98 | 55 | if (data->dai.playback_only && data->dai.capture_only) { |
2a956ec0 | 56 | dev_err(&pdev->dev, "no enabled S/PDIF DAI link\n"); |
14c3aa98 | 57 | goto end; |
2a956ec0 NC |
58 | } |
59 | ||
60 | data->card.dev = &pdev->dev; | |
14c3aa98 NC |
61 | data->card.dai_link = &data->dai; |
62 | data->card.num_links = 1; | |
7a3a9070 | 63 | data->card.owner = THIS_MODULE; |
2a956ec0 NC |
64 | |
65 | ret = snd_soc_of_parse_card_name(&data->card, "model"); | |
66 | if (ret) | |
14c3aa98 | 67 | goto end; |
2a956ec0 | 68 | |
ff27d9b3 | 69 | ret = devm_snd_soc_register_card(&pdev->dev, &data->card); |
2a956ec0 NC |
70 | if (ret) { |
71 | dev_err(&pdev->dev, "snd_soc_register_card failed: %d\n", ret); | |
14c3aa98 | 72 | goto end; |
2a956ec0 NC |
73 | } |
74 | ||
75 | platform_set_drvdata(pdev, data); | |
76 | ||
2a956ec0 | 77 | end: |
aa4ac920 | 78 | of_node_put(spdif_np); |
2a956ec0 NC |
79 | |
80 | return ret; | |
81 | } | |
82 | ||
2a956ec0 NC |
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", | |
43ac9469 | 92 | .pm = &snd_soc_pm_ops, |
2a956ec0 NC |
93 | .of_match_table = imx_spdif_dt_ids, |
94 | }, | |
95 | .probe = imx_spdif_audio_probe, | |
2a956ec0 NC |
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"); |