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
19struct imx_rpmsg {
20 struct snd_soc_dai_link dai;
21 struct snd_soc_card card;
22 unsigned long sysclk;
23 bool lpa;
24};
25
26static struct dev_pm_ops lpa_pm;
27
28static const struct snd_soc_dapm_widget imx_rpmsg_dapm_widgets[] = {
29 SND_SOC_DAPM_HP("Headphone Jack", NULL),
30 SND_SOC_DAPM_SPK("Ext Spk", NULL),
31 SND_SOC_DAPM_MIC("Mic Jack", NULL),
32 SND_SOC_DAPM_MIC("Main MIC", NULL),
33};
34
35static int imx_rpmsg_late_probe(struct snd_soc_card *card)
36{
37 struct imx_rpmsg *data = snd_soc_card_get_drvdata(card);
38 struct snd_soc_pcm_runtime *rtd = list_first_entry(&card->rtd_list,
39 struct snd_soc_pcm_runtime, list);
40 struct snd_soc_dai *codec_dai = snd_soc_rtd_to_codec(rtd, 0);
41 struct device *dev = card->dev;
42 int ret;
43
44 if (data->lpa) {
45 struct snd_soc_component *codec_comp;
46 struct device_node *codec_np;
47 struct device_driver *codec_drv;
48 struct device *codec_dev = NULL;
49
50 codec_np = data->dai.codecs->of_node;
51 if (codec_np) {
52 struct platform_device *codec_pdev;
53 struct i2c_client *codec_i2c;
54
55 codec_i2c = of_find_i2c_device_by_node(node: codec_np);
56 if (codec_i2c)
57 codec_dev = &codec_i2c->dev;
58 if (!codec_dev) {
59 codec_pdev = of_find_device_by_node(np: codec_np);
60 if (codec_pdev)
61 codec_dev = &codec_pdev->dev;
62 }
63 }
64 if (codec_dev) {
65 codec_comp = snd_soc_lookup_component_nolocked(dev: codec_dev, NULL);
66 if (codec_comp) {
67 int i, num_widgets;
68 const char *widgets;
69 struct snd_soc_dapm_context *dapm;
70
71 num_widgets = of_property_count_strings(np: data->card.dev->of_node,
72 propname: "ignore-suspend-widgets");
73 for (i = 0; i < num_widgets; i++) {
74 of_property_read_string_index(np: data->card.dev->of_node,
75 propname: "ignore-suspend-widgets",
76 index: i, output: &widgets);
77 dapm = snd_soc_component_get_dapm(component: codec_comp);
78 snd_soc_dapm_ignore_suspend(dapm, pin: widgets);
79 }
80 }
81 codec_drv = codec_dev->driver;
82 if (codec_drv->pm) {
83 memcpy(&lpa_pm, codec_drv->pm, sizeof(lpa_pm));
84 lpa_pm.suspend = NULL;
85 lpa_pm.resume = NULL;
86 lpa_pm.freeze = NULL;
87 lpa_pm.thaw = NULL;
88 lpa_pm.poweroff = NULL;
89 lpa_pm.restore = NULL;
90 codec_drv->pm = &lpa_pm;
91 }
92 put_device(dev: codec_dev);
93 }
94 }
95
96 if (!data->sysclk)
97 return 0;
98
99 ret = snd_soc_dai_set_sysclk(dai: codec_dai, clk_id: 0, freq: data->sysclk, SND_SOC_CLOCK_IN);
100 if (ret && ret != -ENOTSUPP) {
101 dev_err(dev, "failed to set sysclk in %s\n", __func__);
102 return ret;
103 }
104
105 return 0;
106}
107
108static int imx_rpmsg_probe(struct platform_device *pdev)
109{
110 struct snd_soc_dai_link_component *dlc;
111 struct device *dev = pdev->dev.parent;
112 /* rpmsg_pdev is the platform device for the rpmsg node that probed us */
113 struct platform_device *rpmsg_pdev = to_platform_device(dev);
114 struct device_node *np = rpmsg_pdev->dev.of_node;
115 struct of_phandle_args args;
116 const char *platform_name;
117 struct imx_rpmsg *data;
118 int ret = 0;
119
120 dlc = devm_kzalloc(dev: &pdev->dev, size: 3 * sizeof(*dlc), GFP_KERNEL);
121 if (!dlc)
122 return -ENOMEM;
123
124 data = devm_kzalloc(dev: &pdev->dev, size: sizeof(*data), GFP_KERNEL);
125 if (!data) {
126 ret = -ENOMEM;
127 goto fail;
128 }
129
130 ret = of_reserved_mem_device_init_by_idx(dev: &pdev->dev, np, idx: 0);
131 if (ret)
132 dev_warn(&pdev->dev, "no reserved DMA memory\n");
133
134 data->dai.cpus = &dlc[0];
135 data->dai.num_cpus = 1;
136 data->dai.platforms = &dlc[1];
137 data->dai.num_platforms = 1;
138 data->dai.codecs = &dlc[2];
139 data->dai.num_codecs = 1;
140
141 data->dai.name = "rpmsg hifi";
142 data->dai.stream_name = "rpmsg hifi";
143 data->dai.dai_fmt = SND_SOC_DAIFMT_I2S |
144 SND_SOC_DAIFMT_NB_NF |
145 SND_SOC_DAIFMT_CBC_CFC;
146
147 /*
148 * i.MX rpmsg sound cards work on codec slave mode. MCLK will be
149 * disabled by CPU DAI driver in hw_free(). Some codec requires MCLK
150 * present at power up/down sequence. So need to set ignore_pmdown_time
151 * to power down codec immediately before MCLK is turned off.
152 */
153 data->dai.ignore_pmdown_time = 1;
154
155 /* Optional codec node */
156 ret = of_parse_phandle_with_fixed_args(np, list_name: "audio-codec", cell_count: 0, index: 0, out_args: &args);
157 if (ret) {
158 *data->dai.codecs = snd_soc_dummy_dlc;
159 } else {
160 struct clk *clk;
161
162 ret = snd_soc_get_dlc(args: &args, dlc: data->dai.codecs);
163 if (ret) {
164 dev_err(&pdev->dev, "Unable to get codec_dai_name\n");
165 goto fail;
166 }
167
168 clk = devm_get_clk_from_child(dev: &pdev->dev, np: args.np, NULL);
169 if (!IS_ERR(ptr: clk))
170 data->sysclk = clk_get_rate(clk);
171 }
172
173 data->dai.cpus->dai_name = dev_name(dev: &rpmsg_pdev->dev);
174 if (!of_property_read_string(np, propname: "fsl,rpmsg-channel-name", out_string: &platform_name))
175 data->dai.platforms->name = platform_name;
176 else
177 data->dai.platforms->name = "rpmsg-audio-channel";
178 data->dai.playback_only = true;
179 data->dai.capture_only = true;
180 data->card.num_links = 1;
181 data->card.dai_link = &data->dai;
182
183 if (of_property_read_bool(np, propname: "fsl,rpmsg-out"))
184 data->dai.capture_only = false;
185
186 if (of_property_read_bool(np, propname: "fsl,rpmsg-in"))
187 data->dai.playback_only = false;
188
189 if (data->dai.playback_only && data->dai.capture_only) {
190 dev_err(&pdev->dev, "no enabled rpmsg DAI link\n");
191 ret = -EINVAL;
192 goto fail;
193 }
194
195 if (of_property_read_bool(np, propname: "fsl,enable-lpa"))
196 data->lpa = true;
197
198 data->card.dev = &pdev->dev;
199 data->card.owner = THIS_MODULE;
200 data->card.dapm_widgets = imx_rpmsg_dapm_widgets;
201 data->card.num_dapm_widgets = ARRAY_SIZE(imx_rpmsg_dapm_widgets);
202 data->card.late_probe = imx_rpmsg_late_probe;
203 /*
204 * Inoder to use common api to get card name and audio routing.
205 * Use parent of_node for this device, revert it after finishing using
206 */
207 data->card.dev->of_node = np;
208
209 ret = snd_soc_of_parse_card_name(card: &data->card, propname: "model");
210 if (ret)
211 goto fail;
212
213 if (of_property_read_bool(np, propname: "audio-routing")) {
214 ret = snd_soc_of_parse_audio_routing(card: &data->card, propname: "audio-routing");
215 if (ret) {
216 dev_err(&pdev->dev, "failed to parse audio-routing: %d\n", ret);
217 goto fail;
218 }
219 }
220
221 platform_set_drvdata(pdev, data: &data->card);
222 snd_soc_card_set_drvdata(card: &data->card, data);
223 ret = devm_snd_soc_register_card(dev: &pdev->dev, card: &data->card);
224 if (ret) {
225 dev_err_probe(dev: &pdev->dev, err: ret, fmt: "snd_soc_register_card failed\n");
226 goto fail;
227 }
228
229fail:
230 pdev->dev.of_node = NULL;
231 return ret;
232}
233
234static struct platform_driver imx_rpmsg_driver = {
235 .driver = {
236 .name = "imx-audio-rpmsg",
237 .pm = &snd_soc_pm_ops,
238 },
239 .probe = imx_rpmsg_probe,
240};
241module_platform_driver(imx_rpmsg_driver);
242
243MODULE_DESCRIPTION("Freescale SoC Audio RPMSG Machine Driver");
244MODULE_AUTHOR("Shengjiu Wang <shengjiu.wang@nxp.com>");
245MODULE_ALIAS("platform:imx-audio-rpmsg");
246MODULE_LICENSE("GPL v2");
247

source code of linux/sound/soc/fsl/imx-rpmsg.c