1// SPDX-License-Identifier: GPL-2.0-only
  2/*
  3 * tegra20_wm9712.c - Tegra machine ASoC driver for boards using WM9712 codec.
  4 *
  5 * Copyright 2012 Lucas Stach <dev@lynxeye.de>
  6 *
  7 * Partly based on code copyright/by:
  8 * Copyright 2011,2012 Toradex Inc.
  9 */
 10
 11#include <linux/module.h>
 12#include <linux/platform_device.h>
 13#include <linux/slab.h>
 14#include <linux/gpio.h>
 15#include <linux/of_gpio.h>
 16
 17#include <sound/core.h>
 18#include <sound/jack.h>
 19#include <sound/pcm.h>
 20#include <sound/pcm_params.h>
 21#include <sound/soc.h>
 22
 23#include "tegra_asoc_utils.h"
 24
 25#define DRV_NAME "tegra-snd-wm9712"
 26
 27struct tegra_wm9712 {
 28	struct platform_device *codec;
 29	struct tegra_asoc_utils_data util_data;
 30};
 31
 32static const struct snd_soc_dapm_widget tegra_wm9712_dapm_widgets[] = {
 33	SND_SOC_DAPM_HP("Headphone", NULL),
 34	SND_SOC_DAPM_LINE("LineIn", NULL),
 35	SND_SOC_DAPM_MIC("Mic", NULL),
 36};
 37
 38static int tegra_wm9712_init(struct snd_soc_pcm_runtime *rtd)
 39{
 40	return snd_soc_dapm_force_enable_pin(&rtd->card->dapm, "Mic Bias");
 41}
 42
 43SND_SOC_DAILINK_DEFS(hifi,
 44	DAILINK_COMP_ARRAY(COMP_EMPTY()),
 45	DAILINK_COMP_ARRAY(COMP_CODEC("wm9712-codec", "wm9712-hifi")),
 46	DAILINK_COMP_ARRAY(COMP_EMPTY()));
 47
 48static struct snd_soc_dai_link tegra_wm9712_dai = {
 49	.name = "AC97 HiFi",
 50	.stream_name = "AC97 HiFi",
 51	.init = tegra_wm9712_init,
 52	SND_SOC_DAILINK_REG(hifi),
 53};
 54
 55static struct snd_soc_card snd_soc_tegra_wm9712 = {
 56	.name = "tegra-wm9712",
 57	.owner = THIS_MODULE,
 58	.dai_link = &tegra_wm9712_dai,
 59	.num_links = 1,
 60
 61	.dapm_widgets = tegra_wm9712_dapm_widgets,
 62	.num_dapm_widgets = ARRAY_SIZE(tegra_wm9712_dapm_widgets),
 63	.fully_routed = true,
 64};
 65
 66static int tegra_wm9712_driver_probe(struct platform_device *pdev)
 67{
 68	struct device_node *np = pdev->dev.of_node;
 69	struct snd_soc_card *card = &snd_soc_tegra_wm9712;
 70	struct tegra_wm9712 *machine;
 71	int ret;
 72
 73	machine = devm_kzalloc(&pdev->dev, sizeof(struct tegra_wm9712),
 74			       GFP_KERNEL);
 75	if (!machine)
 76		return -ENOMEM;
 77
 78	card->dev = &pdev->dev;
 79	snd_soc_card_set_drvdata(card, machine);
 80
 81	machine->codec = platform_device_alloc("wm9712-codec", -1);
 82	if (!machine->codec) {
 83		dev_err(&pdev->dev, "Can't allocate wm9712 platform device\n");
 84		return -ENOMEM;
 85	}
 86
 87	ret = platform_device_add(machine->codec);
 88	if (ret)
 89		goto codec_put;
 90
 91	ret = snd_soc_of_parse_card_name(card, "nvidia,model");
 92	if (ret)
 93		goto codec_unregister;
 94
 95	ret = snd_soc_of_parse_audio_routing(card, "nvidia,audio-routing");
 96	if (ret)
 97		goto codec_unregister;
 98
 99	tegra_wm9712_dai.cpus->of_node = of_parse_phandle(np,
100				       "nvidia,ac97-controller", 0);
101	if (!tegra_wm9712_dai.cpus->of_node) {
102		dev_err(&pdev->dev,
103			"Property 'nvidia,ac97-controller' missing or invalid\n");
104		ret = -EINVAL;
105		goto codec_unregister;
106	}
107
108	tegra_wm9712_dai.platforms->of_node = tegra_wm9712_dai.cpus->of_node;
109
110	ret = tegra_asoc_utils_init(&machine->util_data, &pdev->dev);
111	if (ret)
112		goto codec_unregister;
113
114	ret = tegra_asoc_utils_set_ac97_rate(&machine->util_data);
115	if (ret)
116		goto asoc_utils_fini;
117
118	ret = snd_soc_register_card(card);
119	if (ret) {
120		dev_err(&pdev->dev, "snd_soc_register_card failed (%d)\n",
121			ret);
122		goto asoc_utils_fini;
123	}
124
125	return 0;
126
127asoc_utils_fini:
128	tegra_asoc_utils_fini(&machine->util_data);
129codec_unregister:
130	platform_device_del(machine->codec);
131codec_put:
132	platform_device_put(machine->codec);
133	return ret;
134}
135
136static int tegra_wm9712_driver_remove(struct platform_device *pdev)
137{
138	struct snd_soc_card *card = platform_get_drvdata(pdev);
139	struct tegra_wm9712 *machine = snd_soc_card_get_drvdata(card);
140
141	snd_soc_unregister_card(card);
142
143	tegra_asoc_utils_fini(&machine->util_data);
144
145	platform_device_unregister(machine->codec);
146
147	return 0;
148}
149
150static const struct of_device_id tegra_wm9712_of_match[] = {
151	{ .compatible = "nvidia,tegra-audio-wm9712", },
152	{},
153};
154
155static struct platform_driver tegra_wm9712_driver = {
156	.driver = {
157		.name = DRV_NAME,
158		.pm = &snd_soc_pm_ops,
159		.of_match_table = tegra_wm9712_of_match,
160	},
161	.probe = tegra_wm9712_driver_probe,
162	.remove = tegra_wm9712_driver_remove,
163};
164module_platform_driver(tegra_wm9712_driver);
165
166MODULE_AUTHOR("Lucas Stach");
167MODULE_DESCRIPTION("Tegra+WM9712 machine ASoC driver");
168MODULE_LICENSE("GPL v2");
169MODULE_ALIAS("platform:" DRV_NAME);
170MODULE_DEVICE_TABLE(of, tegra_wm9712_of_match);