1
2
3
4#include <linux/module.h>
5#include <linux/of_platform.h>
6#include <sound/jack.h>
7#include <sound/pcm_params.h>
8#include <sound/hdmi-codec.h>
9#include "fsl_sai.h"
10
11
12
13
14
15
16
17
18struct cpu_priv {
19 u32 sysclk_id[2];
20 u32 slot_width;
21};
22
23struct imx_hdmi_data {
24 struct snd_soc_dai_link dai;
25 struct snd_soc_card card;
26 struct snd_soc_jack hdmi_jack;
27 struct snd_soc_jack_pin hdmi_jack_pin;
28 struct cpu_priv cpu_priv;
29 u32 dai_fmt;
30};
31
32static int imx_hdmi_hw_params(struct snd_pcm_substream *substream,
33 struct snd_pcm_hw_params *params)
34{
35 struct snd_soc_pcm_runtime *rtd = substream->private_data;
36 struct imx_hdmi_data *data = snd_soc_card_get_drvdata(rtd->card);
37 bool tx = substream->stream == SNDRV_PCM_STREAM_PLAYBACK;
38 struct snd_soc_dai *cpu_dai = asoc_rtd_to_cpu(rtd, 0);
39 struct snd_soc_card *card = rtd->card;
40 struct device *dev = card->dev;
41 u32 slot_width = data->cpu_priv.slot_width;
42 int ret;
43
44
45 ret = snd_soc_dai_set_sysclk(cpu_dai, data->cpu_priv.sysclk_id[tx],
46 8 * slot_width * params_rate(params),
47 tx ? SND_SOC_CLOCK_OUT : SND_SOC_CLOCK_IN);
48 if (ret && ret != -ENOTSUPP) {
49 dev_err(dev, "failed to set cpu sysclk: %d\n", ret);
50 return ret;
51 }
52
53 ret = snd_soc_dai_set_tdm_slot(cpu_dai, 0, 0, 2, slot_width);
54 if (ret && ret != -ENOTSUPP) {
55 dev_err(dev, "failed to set cpu dai tdm slot: %d\n", ret);
56 return ret;
57 }
58
59 return 0;
60}
61
62static struct snd_soc_ops imx_hdmi_ops = {
63 .hw_params = imx_hdmi_hw_params,
64};
65
66static const struct snd_soc_dapm_widget imx_hdmi_widgets[] = {
67 SND_SOC_DAPM_LINE("HDMI Jack", NULL),
68};
69
70static int imx_hdmi_init(struct snd_soc_pcm_runtime *rtd)
71{
72 struct snd_soc_card *card = rtd->card;
73 struct snd_soc_dai *codec_dai = asoc_rtd_to_codec(rtd, 0);
74 struct snd_soc_component *component = codec_dai->component;
75 struct imx_hdmi_data *data = snd_soc_card_get_drvdata(card);
76 int ret;
77
78 data->hdmi_jack_pin.pin = "HDMI Jack";
79 data->hdmi_jack_pin.mask = SND_JACK_LINEOUT;
80
81 ret = snd_soc_card_jack_new(card, "HDMI Jack", SND_JACK_LINEOUT,
82 &data->hdmi_jack, &data->hdmi_jack_pin, 1);
83 if (ret) {
84 dev_err(card->dev, "Can't new HDMI Jack %d\n", ret);
85 return ret;
86 }
87
88 ret = snd_soc_component_set_jack(component, &data->hdmi_jack, NULL);
89 if (ret && ret != -ENOTSUPP) {
90 dev_err(card->dev, "Can't set HDMI Jack %d\n", ret);
91 return ret;
92 }
93
94 return 0;
95};
96
97static int imx_hdmi_probe(struct platform_device *pdev)
98{
99 struct device_node *np = pdev->dev.of_node;
100 bool hdmi_out = of_property_read_bool(np, "hdmi-out");
101 bool hdmi_in = of_property_read_bool(np, "hdmi-in");
102 struct snd_soc_dai_link_component *dlc;
103 struct platform_device *cpu_pdev;
104 struct device_node *cpu_np;
105 struct imx_hdmi_data *data;
106 int ret;
107
108 dlc = devm_kzalloc(&pdev->dev, 3 * sizeof(*dlc), GFP_KERNEL);
109 if (!dlc)
110 return -ENOMEM;
111
112 cpu_np = of_parse_phandle(np, "audio-cpu", 0);
113 if (!cpu_np) {
114 dev_err(&pdev->dev, "cpu dai phandle missing or invalid\n");
115 ret = -EINVAL;
116 goto fail;
117 }
118
119 cpu_pdev = of_find_device_by_node(cpu_np);
120 if (!cpu_pdev) {
121 dev_err(&pdev->dev, "failed to find SAI platform device\n");
122 ret = -EINVAL;
123 goto fail;
124 }
125
126 data = devm_kzalloc(&pdev->dev, sizeof(*data), GFP_KERNEL);
127 if (!data) {
128 ret = -ENOMEM;
129 goto fail;
130 }
131
132 data->dai.cpus = &dlc[0];
133 data->dai.num_cpus = 1;
134 data->dai.platforms = &dlc[1];
135 data->dai.num_platforms = 1;
136 data->dai.codecs = &dlc[2];
137 data->dai.num_codecs = 1;
138
139 data->dai.name = "i.MX HDMI";
140 data->dai.stream_name = "i.MX HDMI";
141 data->dai.cpus->dai_name = dev_name(&cpu_pdev->dev);
142 data->dai.platforms->of_node = cpu_np;
143 data->dai.ops = &imx_hdmi_ops;
144 data->dai.playback_only = true;
145 data->dai.capture_only = false;
146 data->dai.init = imx_hdmi_init;
147
148 if (of_node_name_eq(cpu_np, "sai")) {
149 data->cpu_priv.sysclk_id[1] = FSL_SAI_CLK_MAST1;
150 data->cpu_priv.sysclk_id[0] = FSL_SAI_CLK_MAST1;
151 }
152
153 if (of_device_is_compatible(np, "fsl,imx-audio-sii902x")) {
154 data->dai_fmt = SND_SOC_DAIFMT_LEFT_J;
155 data->cpu_priv.slot_width = 24;
156 } else {
157 data->dai_fmt = SND_SOC_DAIFMT_I2S;
158 data->cpu_priv.slot_width = 32;
159 }
160
161 if ((hdmi_out && hdmi_in) || (!hdmi_out && !hdmi_in)) {
162 dev_err(&pdev->dev, "Invalid HDMI DAI link\n");
163 ret = -EINVAL;
164 goto fail;
165 }
166
167 if (hdmi_out) {
168 data->dai.playback_only = true;
169 data->dai.capture_only = false;
170 data->dai.codecs->dai_name = "i2s-hifi";
171 data->dai.codecs->name = "hdmi-audio-codec.1";
172 data->dai.dai_fmt = data->dai_fmt |
173 SND_SOC_DAIFMT_NB_NF |
174 SND_SOC_DAIFMT_CBS_CFS;
175 }
176
177 if (hdmi_in) {
178 data->dai.playback_only = false;
179 data->dai.capture_only = true;
180 data->dai.codecs->dai_name = "i2s-hifi";
181 data->dai.codecs->name = "hdmi-audio-codec.2";
182 data->dai.dai_fmt = data->dai_fmt |
183 SND_SOC_DAIFMT_NB_NF |
184 SND_SOC_DAIFMT_CBM_CFM;
185 }
186
187 data->card.dapm_widgets = imx_hdmi_widgets;
188 data->card.num_dapm_widgets = ARRAY_SIZE(imx_hdmi_widgets);
189 data->card.dev = &pdev->dev;
190 data->card.owner = THIS_MODULE;
191 ret = snd_soc_of_parse_card_name(&data->card, "model");
192 if (ret)
193 goto fail;
194
195 data->card.num_links = 1;
196 data->card.dai_link = &data->dai;
197
198 snd_soc_card_set_drvdata(&data->card, data);
199 ret = devm_snd_soc_register_card(&pdev->dev, &data->card);
200 if (ret) {
201 dev_err(&pdev->dev, "snd_soc_register_card failed (%d)\n", ret);
202 goto fail;
203 }
204
205fail:
206 if (cpu_np)
207 of_node_put(cpu_np);
208
209 return ret;
210}
211
212static const struct of_device_id imx_hdmi_dt_ids[] = {
213 { .compatible = "fsl,imx-audio-hdmi", },
214 { .compatible = "fsl,imx-audio-sii902x", },
215 { }
216};
217MODULE_DEVICE_TABLE(of, imx_hdmi_dt_ids);
218
219static struct platform_driver imx_hdmi_driver = {
220 .driver = {
221 .name = "imx-hdmi",
222 .pm = &snd_soc_pm_ops,
223 .of_match_table = imx_hdmi_dt_ids,
224 },
225 .probe = imx_hdmi_probe,
226};
227module_platform_driver(imx_hdmi_driver);
228
229MODULE_AUTHOR("Freescale Semiconductor, Inc.");
230MODULE_DESCRIPTION("Freescale i.MX hdmi audio ASoC machine driver");
231MODULE_LICENSE("GPL v2");
232MODULE_ALIAS("platform:imx-hdmi");
233
