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1// SPDX-License-Identifier: GPL-2.0+2// Copyright 2017-2020 NXP3 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/slab.h>9#include <linux/clk.h>10#include <sound/soc.h>11#include <sound/jack.h>12#include <sound/control.h>13#include <sound/pcm_params.h>14#include <sound/soc-dapm.h>15#include "imx-pcm-rpmsg.h"16 17struct imx_rpmsg {18 struct snd_soc_dai_link dai;19 struct snd_soc_card card;20 unsigned long sysclk;21 bool lpa;22};23 24static struct dev_pm_ops lpa_pm;25 26static const struct snd_soc_dapm_widget imx_rpmsg_dapm_widgets[] = {27 SND_SOC_DAPM_HP("Headphone Jack", NULL),28 SND_SOC_DAPM_SPK("Ext Spk", NULL),29 SND_SOC_DAPM_MIC("Mic Jack", NULL),30 SND_SOC_DAPM_MIC("Main MIC", NULL),31};32 33static int imx_rpmsg_late_probe(struct snd_soc_card *card)34{35 struct imx_rpmsg *data = snd_soc_card_get_drvdata(card);36 struct snd_soc_pcm_runtime *rtd = list_first_entry(&card->rtd_list,37 struct snd_soc_pcm_runtime, list);38 struct snd_soc_dai *codec_dai = snd_soc_rtd_to_codec(rtd, 0);39 struct device *dev = card->dev;40 int ret;41 42 if (data->lpa) {43 struct snd_soc_component *codec_comp;44 struct device_node *codec_np;45 struct device_driver *codec_drv;46 struct device *codec_dev = NULL;47 48 codec_np = data->dai.codecs->of_node;49 if (codec_np) {50 struct platform_device *codec_pdev;51 struct i2c_client *codec_i2c;52 53 codec_i2c = of_find_i2c_device_by_node(codec_np);54 if (codec_i2c)55 codec_dev = &codec_i2c->dev;56 if (!codec_dev) {57 codec_pdev = of_find_device_by_node(codec_np);58 if (codec_pdev)59 codec_dev = &codec_pdev->dev;60 }61 }62 if (codec_dev) {63 codec_comp = snd_soc_lookup_component_nolocked(codec_dev, NULL);64 if (codec_comp) {65 int i, num_widgets;66 const char *widgets;67 struct snd_soc_dapm_context *dapm;68 69 num_widgets = of_property_count_strings(data->card.dev->of_node,70 "ignore-suspend-widgets");71 for (i = 0; i < num_widgets; i++) {72 of_property_read_string_index(data->card.dev->of_node,73 "ignore-suspend-widgets",74 i, &widgets);75 dapm = snd_soc_component_get_dapm(codec_comp);76 snd_soc_dapm_ignore_suspend(dapm, widgets);77 }78 }79 codec_drv = codec_dev->driver;80 if (codec_drv->pm) {81 memcpy(&lpa_pm, codec_drv->pm, sizeof(lpa_pm));82 lpa_pm.suspend = NULL;83 lpa_pm.resume = NULL;84 lpa_pm.freeze = NULL;85 lpa_pm.thaw = NULL;86 lpa_pm.poweroff = NULL;87 lpa_pm.restore = NULL;88 codec_drv->pm = &lpa_pm;89 }90 put_device(codec_dev);91 }92 }93 94 if (!data->sysclk)95 return 0;96 97 ret = snd_soc_dai_set_sysclk(codec_dai, 0, data->sysclk, SND_SOC_CLOCK_IN);98 if (ret && ret != -ENOTSUPP) {99 dev_err(dev, "failed to set sysclk in %s\n", __func__);100 return ret;101 }102 103 return 0;104}105 106static int imx_rpmsg_probe(struct platform_device *pdev)107{108 struct snd_soc_dai_link_component *dlc;109 struct snd_soc_dai *cpu_dai;110 struct device_node *np = NULL;111 struct of_phandle_args args;112 const char *platform_name;113 struct imx_rpmsg *data;114 int ret = 0;115 116 dlc = devm_kzalloc(&pdev->dev, 3 * sizeof(*dlc), GFP_KERNEL);117 if (!dlc)118 return -ENOMEM;119 120 data = devm_kzalloc(&pdev->dev, sizeof(*data), GFP_KERNEL);121 if (!data) {122 ret = -ENOMEM;123 goto fail;124 }125 126 data->dai.cpus = &dlc[0];127 data->dai.num_cpus = 1;128 data->dai.platforms = &dlc[1];129 data->dai.num_platforms = 1;130 data->dai.codecs = &dlc[2];131 data->dai.num_codecs = 1;132 133 data->dai.name = "rpmsg hifi";134 data->dai.stream_name = "rpmsg hifi";135 data->dai.dai_fmt = SND_SOC_DAIFMT_I2S |136 SND_SOC_DAIFMT_NB_NF |137 SND_SOC_DAIFMT_CBC_CFC;138 139 /*140 * i.MX rpmsg sound cards work on codec slave mode. MCLK will be141 * disabled by CPU DAI driver in hw_free(). Some codec requires MCLK142 * present at power up/down sequence. So need to set ignore_pmdown_time143 * to power down codec immediately before MCLK is turned off.144 */145 data->dai.ignore_pmdown_time = 1;146 147 data->dai.cpus->dai_name = pdev->dev.platform_data;148 cpu_dai = snd_soc_find_dai(data->dai.cpus);149 if (!cpu_dai) {150 ret = -EPROBE_DEFER;151 goto fail;152 }153 np = cpu_dai->dev->of_node;154 if (!np) {155 dev_err(&pdev->dev, "failed to parse CPU DAI device node\n");156 ret = -ENODEV;157 goto fail;158 }159 160 ret = of_reserved_mem_device_init_by_idx(&pdev->dev, np, 0);161 if (ret)162 dev_warn(&pdev->dev, "no reserved DMA memory\n");163 164 /* Optional codec node */165 ret = of_parse_phandle_with_fixed_args(np, "audio-codec", 0, 0, &args);166 if (ret) {167 *data->dai.codecs = snd_soc_dummy_dlc;168 } else {169 struct clk *clk;170 171 ret = snd_soc_get_dlc(&args, data->dai.codecs);172 if (ret) {173 dev_err(&pdev->dev, "Unable to get codec_dai_name\n");174 goto fail;175 }176 177 clk = devm_get_clk_from_child(&pdev->dev, args.np, NULL);178 if (!IS_ERR(clk))179 data->sysclk = clk_get_rate(clk);180 }181 182 if (!of_property_read_string(np, "fsl,rpmsg-channel-name", &platform_name))183 data->dai.platforms->name = platform_name;184 else185 data->dai.platforms->name = "rpmsg-audio-channel";186 data->dai.playback_only = true;187 data->dai.capture_only = true;188 data->card.num_links = 1;189 data->card.dai_link = &data->dai;190 191 if (of_property_read_bool(np, "fsl,rpmsg-out"))192 data->dai.capture_only = false;193 194 if (of_property_read_bool(np, "fsl,rpmsg-in"))195 data->dai.playback_only = false;196 197 if (data->dai.playback_only && data->dai.capture_only) {198 dev_err(&pdev->dev, "no enabled rpmsg DAI link\n");199 ret = -EINVAL;200 goto fail;201 }202 203 if (of_property_read_bool(np, "fsl,enable-lpa"))204 data->lpa = true;205 206 data->card.dev = &pdev->dev;207 data->card.owner = THIS_MODULE;208 data->card.dapm_widgets = imx_rpmsg_dapm_widgets;209 data->card.num_dapm_widgets = ARRAY_SIZE(imx_rpmsg_dapm_widgets);210 data->card.late_probe = imx_rpmsg_late_probe;211 /*212 * Inoder to use common api to get card name and audio routing.213 * Use parent of_node for this device, revert it after finishing using214 */215 data->card.dev->of_node = np;216 217 ret = snd_soc_of_parse_card_name(&data->card, "model");218 if (ret)219 goto fail;220 221 if (of_property_read_bool(np, "audio-routing")) {222 ret = snd_soc_of_parse_audio_routing(&data->card, "audio-routing");223 if (ret) {224 dev_err(&pdev->dev, "failed to parse audio-routing: %d\n", ret);225 goto fail;226 }227 }228 229 platform_set_drvdata(pdev, &data->card);230 snd_soc_card_set_drvdata(&data->card, data);231 ret = devm_snd_soc_register_card(&pdev->dev, &data->card);232 if (ret) {233 dev_err_probe(&pdev->dev, ret, "snd_soc_register_card failed\n");234 goto fail;235 }236 237fail:238 pdev->dev.of_node = NULL;239 return ret;240}241 242static struct platform_driver imx_rpmsg_driver = {243 .driver = {244 .name = "imx-audio-rpmsg",245 .pm = &snd_soc_pm_ops,246 },247 .probe = imx_rpmsg_probe,248};249module_platform_driver(imx_rpmsg_driver);250 251MODULE_DESCRIPTION("Freescale SoC Audio RPMSG Machine Driver");252MODULE_AUTHOR("Shengjiu Wang <shengjiu.wang@nxp.com>");253MODULE_ALIAS("platform:imx-audio-rpmsg");254MODULE_LICENSE("GPL v2");255