1 // SPDX-License-Identifier: GPL-2.0+
2 // Copyright 2017-2020 NXP
3
4 #include <linux/module.h>
5 #include <linux/of_platform.h>
6 #include <linux/of_reserved_mem.h>
7 #include <linux/i2c.h>
8 #include <linux/of_gpio.h>
9 #include <linux/slab.h>
10 #include <linux/gpio.h>
11 #include <linux/clk.h>
12 #include <sound/soc.h>
13 #include <sound/jack.h>
14 #include <sound/control.h>
15 #include <sound/pcm_params.h>
16 #include <sound/soc-dapm.h>
17 #include "imx-pcm-rpmsg.h"
18
19 struct imx_rpmsg {
20 struct snd_soc_dai_link dai;
21 struct snd_soc_card card;
22 };
23
24 static const struct snd_soc_dapm_widget imx_rpmsg_dapm_widgets[] = {
25 SND_SOC_DAPM_HP("Headphone Jack", NULL),
26 SND_SOC_DAPM_SPK("Ext Spk", NULL),
27 SND_SOC_DAPM_MIC("Mic Jack", NULL),
28 SND_SOC_DAPM_MIC("Main MIC", NULL),
29 };
30
imx_rpmsg_probe(struct platform_device * pdev)31 static int imx_rpmsg_probe(struct platform_device *pdev)
32 {
33 struct snd_soc_dai_link_component *dlc;
34 struct device *dev = pdev->dev.parent;
35 /* rpmsg_pdev is the platform device for the rpmsg node that probed us */
36 struct platform_device *rpmsg_pdev = to_platform_device(dev);
37 struct device_node *np = rpmsg_pdev->dev.of_node;
38 struct of_phandle_args args;
39 struct imx_rpmsg *data;
40 int ret = 0;
41
42 dlc = devm_kzalloc(&pdev->dev, 3 * sizeof(*dlc), GFP_KERNEL);
43 if (!dlc)
44 return -ENOMEM;
45
46 data = devm_kzalloc(&pdev->dev, sizeof(*data), GFP_KERNEL);
47 if (!data) {
48 ret = -ENOMEM;
49 goto fail;
50 }
51
52 ret = of_reserved_mem_device_init_by_idx(&pdev->dev, np, 0);
53 if (ret)
54 dev_warn(&pdev->dev, "no reserved DMA memory\n");
55
56 data->dai.cpus = &dlc[0];
57 data->dai.num_cpus = 1;
58 data->dai.platforms = &dlc[1];
59 data->dai.num_platforms = 1;
60 data->dai.codecs = &dlc[2];
61 data->dai.num_codecs = 1;
62
63 data->dai.name = "rpmsg hifi";
64 data->dai.stream_name = "rpmsg hifi";
65 data->dai.dai_fmt = SND_SOC_DAIFMT_I2S |
66 SND_SOC_DAIFMT_NB_NF |
67 SND_SOC_DAIFMT_CBS_CFS;
68
69 /*
70 * i.MX rpmsg sound cards work on codec slave mode. MCLK will be
71 * disabled by CPU DAI driver in hw_free(). Some codec requires MCLK
72 * present at power up/down sequence. So need to set ignore_pmdown_time
73 * to power down codec immediately before MCLK is turned off.
74 */
75 data->dai.ignore_pmdown_time = 1;
76
77 /* Optional codec node */
78 ret = of_parse_phandle_with_fixed_args(np, "audio-codec", 0, 0, &args);
79 if (ret) {
80 data->dai.codecs->dai_name = "snd-soc-dummy-dai";
81 data->dai.codecs->name = "snd-soc-dummy";
82 } else {
83 data->dai.codecs->of_node = args.np;
84 ret = snd_soc_get_dai_name(&args, &data->dai.codecs->dai_name);
85 if (ret) {
86 dev_err(&pdev->dev, "Unable to get codec_dai_name\n");
87 goto fail;
88 }
89 }
90
91 data->dai.cpus->dai_name = dev_name(&rpmsg_pdev->dev);
92 data->dai.platforms->name = IMX_PCM_DRV_NAME;
93 data->dai.playback_only = true;
94 data->dai.capture_only = true;
95 data->card.num_links = 1;
96 data->card.dai_link = &data->dai;
97
98 if (of_property_read_bool(np, "fsl,rpmsg-out"))
99 data->dai.capture_only = false;
100
101 if (of_property_read_bool(np, "fsl,rpmsg-in"))
102 data->dai.playback_only = false;
103
104 if (data->dai.playback_only && data->dai.capture_only) {
105 dev_err(&pdev->dev, "no enabled rpmsg DAI link\n");
106 ret = -EINVAL;
107 goto fail;
108 }
109
110 data->card.dev = &pdev->dev;
111 data->card.owner = THIS_MODULE;
112 data->card.dapm_widgets = imx_rpmsg_dapm_widgets;
113 data->card.num_dapm_widgets = ARRAY_SIZE(imx_rpmsg_dapm_widgets);
114 /*
115 * Inoder to use common api to get card name and audio routing.
116 * Use parent of_node for this device, revert it after finishing using
117 */
118 data->card.dev->of_node = np;
119
120 ret = snd_soc_of_parse_card_name(&data->card, "model");
121 if (ret)
122 goto fail;
123
124 if (of_property_read_bool(np, "audio-routing")) {
125 ret = snd_soc_of_parse_audio_routing(&data->card, "audio-routing");
126 if (ret) {
127 dev_err(&pdev->dev, "failed to parse audio-routing: %d\n", ret);
128 goto fail;
129 }
130 }
131
132 platform_set_drvdata(pdev, &data->card);
133 snd_soc_card_set_drvdata(&data->card, data);
134 ret = devm_snd_soc_register_card(&pdev->dev, &data->card);
135 if (ret) {
136 dev_err_probe(&pdev->dev, ret, "snd_soc_register_card failed\n");
137 goto fail;
138 }
139
140 fail:
141 pdev->dev.of_node = NULL;
142 return ret;
143 }
144
145 static struct platform_driver imx_rpmsg_driver = {
146 .driver = {
147 .name = "imx-audio-rpmsg",
148 .pm = &snd_soc_pm_ops,
149 },
150 .probe = imx_rpmsg_probe,
151 };
152 module_platform_driver(imx_rpmsg_driver);
153
154 MODULE_DESCRIPTION("Freescale SoC Audio RPMSG Machine Driver");
155 MODULE_AUTHOR("Shengjiu Wang <shengjiu.wang@nxp.com>");
156 MODULE_ALIAS("platform:imx-audio-rpmsg");
157 MODULE_LICENSE("GPL v2");
158