1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
75
76
77
78
79
80
81
82
83
84
85
86
87
88
89
90
91
92
93
94
95
96
97
98
99
100
101
102
103
104
105
106
107
108
109
110
111
112
113
114
115
116
117
118
119
120
121
122
123
124
125
126
127
128
129
130
131
132
133
134
135
136
137
138
139
140
141
142
143
144
145
146
147
148
149
150
151
152
153
154
155
156
157
158
159
160
161
162
163
164
165
166
167
168
169
170
171
172
173
174
175
176
177
178
179
180
181
182
183
184
185
186
|
// SPDX-License-Identifier: GPL-2.0+
// Copyright 2017-2020 NXP
#include <linux/module.h>
#include <linux/of_platform.h>
#include <linux/of_reserved_mem.h>
#include <linux/i2c.h>
#include <linux/of_gpio.h>
#include <linux/slab.h>
#include <linux/gpio.h>
#include <linux/clk.h>
#include <sound/soc.h>
#include <sound/jack.h>
#include <sound/control.h>
#include <sound/pcm_params.h>
#include <sound/soc-dapm.h>
#include "imx-pcm-rpmsg.h"
struct imx_rpmsg {
struct snd_soc_dai_link dai;
struct snd_soc_card card;
unsigned long sysclk;
};
static const struct snd_soc_dapm_widget imx_rpmsg_dapm_widgets[] = {
SND_SOC_DAPM_HP("Headphone Jack", NULL),
SND_SOC_DAPM_SPK("Ext Spk", NULL),
SND_SOC_DAPM_MIC("Mic Jack", NULL),
SND_SOC_DAPM_MIC("Main MIC", NULL),
};
static int imx_rpmsg_late_probe(struct snd_soc_card *card)
{
struct imx_rpmsg *data = snd_soc_card_get_drvdata(card);
struct snd_soc_pcm_runtime *rtd = list_first_entry(&card->rtd_list,
struct snd_soc_pcm_runtime, list);
struct snd_soc_dai *codec_dai = asoc_rtd_to_codec(rtd, 0);
struct device *dev = card->dev;
int ret;
if (!data->sysclk)
return 0;
ret = snd_soc_dai_set_sysclk(codec_dai, 0, data->sysclk, SND_SOC_CLOCK_IN);
if (ret && ret != -ENOTSUPP) {
dev_err(dev, "failed to set sysclk in %s\n", __func__);
return ret;
}
return 0;
}
static int imx_rpmsg_probe(struct platform_device *pdev)
{
struct snd_soc_dai_link_component *dlc;
struct device *dev = pdev->dev.parent;
/* rpmsg_pdev is the platform device for the rpmsg node that probed us */
struct platform_device *rpmsg_pdev = to_platform_device(dev);
struct device_node *np = rpmsg_pdev->dev.of_node;
struct of_phandle_args args;
struct imx_rpmsg *data;
int ret = 0;
dlc = devm_kzalloc(&pdev->dev, 3 * sizeof(*dlc), GFP_KERNEL);
if (!dlc)
return -ENOMEM;
data = devm_kzalloc(&pdev->dev, sizeof(*data), GFP_KERNEL);
if (!data) {
ret = -ENOMEM;
goto fail;
}
ret = of_reserved_mem_device_init_by_idx(&pdev->dev, np, 0);
if (ret)
dev_warn(&pdev->dev, "no reserved DMA memory\n");
data->dai.cpus = &dlc[0];
data->dai.num_cpus = 1;
data->dai.platforms = &dlc[1];
data->dai.num_platforms = 1;
data->dai.codecs = &dlc[2];
data->dai.num_codecs = 1;
data->dai.name = "rpmsg hifi";
data->dai.stream_name = "rpmsg hifi";
data->dai.dai_fmt = SND_SOC_DAIFMT_I2S |
SND_SOC_DAIFMT_NB_NF |
SND_SOC_DAIFMT_CBC_CFC;
/*
* i.MX rpmsg sound cards work on codec slave mode. MCLK will be
* disabled by CPU DAI driver in hw_free(). Some codec requires MCLK
* present at power up/down sequence. So need to set ignore_pmdown_time
* to power down codec immediately before MCLK is turned off.
*/
data->dai.ignore_pmdown_time = 1;
/* Optional codec node */
ret = of_parse_phandle_with_fixed_args(np, "audio-codec", 0, 0, &args);
if (ret) {
data->dai.codecs->dai_name = "snd-soc-dummy-dai";
data->dai.codecs->name = "snd-soc-dummy";
} else {
struct clk *clk;
data->dai.codecs->of_node = args.np;
ret = snd_soc_get_dai_name(&args, &data->dai.codecs->dai_name);
if (ret) {
dev_err(&pdev->dev, "Unable to get codec_dai_name\n");
goto fail;
}
clk = devm_get_clk_from_child(&pdev->dev, args.np, NULL);
if (!IS_ERR(clk))
data->sysclk = clk_get_rate(clk);
}
data->dai.cpus->dai_name = dev_name(&rpmsg_pdev->dev);
data->dai.platforms->name = IMX_PCM_DRV_NAME;
data->dai.playback_only = true;
data->dai.capture_only = true;
data->card.num_links = 1;
data->card.dai_link = &data->dai;
if (of_property_read_bool(np, "fsl,rpmsg-out"))
data->dai.capture_only = false;
if (of_property_read_bool(np, "fsl,rpmsg-in"))
data->dai.playback_only = false;
if (data->dai.playback_only && data->dai.capture_only) {
dev_err(&pdev->dev, "no enabled rpmsg DAI link\n");
ret = -EINVAL;
goto fail;
}
data->card.dev = &pdev->dev;
data->card.owner = THIS_MODULE;
data->card.dapm_widgets = imx_rpmsg_dapm_widgets;
data->card.num_dapm_widgets = ARRAY_SIZE(imx_rpmsg_dapm_widgets);
data->card.late_probe = imx_rpmsg_late_probe;
/*
* Inoder to use common api to get card name and audio routing.
* Use parent of_node for this device, revert it after finishing using
*/
data->card.dev->of_node = np;
ret = snd_soc_of_parse_card_name(&data->card, "model");
if (ret)
goto fail;
if (of_property_read_bool(np, "audio-routing")) {
ret = snd_soc_of_parse_audio_routing(&data->card, "audio-routing");
if (ret) {
dev_err(&pdev->dev, "failed to parse audio-routing: %d\n", ret);
goto fail;
}
}
platform_set_drvdata(pdev, &data->card);
snd_soc_card_set_drvdata(&data->card, data);
ret = devm_snd_soc_register_card(&pdev->dev, &data->card);
if (ret) {
dev_err_probe(&pdev->dev, ret, "snd_soc_register_card failed\n");
goto fail;
}
fail:
pdev->dev.of_node = NULL;
return ret;
}
static struct platform_driver imx_rpmsg_driver = {
.driver = {
.name = "imx-audio-rpmsg",
.pm = &snd_soc_pm_ops,
},
.probe = imx_rpmsg_probe,
};
module_platform_driver(imx_rpmsg_driver);
MODULE_DESCRIPTION("Freescale SoC Audio RPMSG Machine Driver");
MODULE_AUTHOR("Shengjiu Wang <shengjiu.wang@nxp.com>");
MODULE_ALIAS("platform:imx-audio-rpmsg");
MODULE_LICENSE("GPL v2");
|
