tegra_wm8903.c

  1// SPDX-License-Identifier: GPL-2.0-only
  2/*
  3 * tegra_wm8903.c - Tegra machine ASoC driver for boards using WM8903 codec.
  4 *
  5 * Author: Stephen Warren <swarren@nvidia.com>
  6 * Copyright (C) 2010-2012 - NVIDIA, Inc.
  7 *
  8 * Based on code copyright/by:
  9 *
 10 * (c) 2009, 2010 Nvidia Graphics Pvt. Ltd.
 11 *
 12 * Copyright 2007 Wolfson Microelectronics PLC.
 13 * Author: Graeme Gregory
 14 *         graeme.gregory@wolfsonmicro.com or linux@wolfsonmicro.com
 15 */
 16
 17#include <linux/gpio/consumer.h>
 18#include <linux/of.h>
 19#include <linux/module.h>
 20#include <linux/platform_device.h>
 21
 22#include <sound/core.h>
 23#include <sound/jack.h>
 24#include <sound/soc.h>
 25
 26#include "../codecs/wm8903.h"
 27
 28#include "tegra_asoc_machine.h"
 29
 30static struct snd_soc_jack_pin tegra_wm8903_mic_jack_pins[] = {
 31	{ .pin = "Mic Jack", .mask = SND_JACK_MICROPHONE },
 32};
 33
 34static unsigned int tegra_wm8903_mclk_rate(unsigned int srate)
 35{
 36	unsigned int mclk;
 37
 38	switch (srate) {
 39	case 64000:
 40	case 88200:
 41	case 96000:
 42		mclk = 128 * srate;
 43		break;
 44	default:
 45		mclk = 256 * srate;
 46		break;
 47	}
 48	/* FIXME: Codec only requires >= 3MHz if OSR==0 */
 49	while (mclk < 6000000)
 50		mclk *= 2;
 51
 52	return mclk;
 53}
 54
 55static int tegra_wm8903_init(struct snd_soc_pcm_runtime *rtd)
 56{
 57	struct tegra_machine *machine = snd_soc_card_get_drvdata(rtd->card);
 58	struct snd_soc_card *card = rtd->card;
 59	struct snd_soc_dapm_context *dapm = snd_soc_card_to_dapm(card);
 60	int err;
 61
 62	/*
 63	 * Older version of machine driver was ignoring GPIO polarity,
 64	 * forcing it to active-low.  This means that all older device-trees
 65	 * which set the polarity to active-high are wrong and we need to fix
 66	 * them up.
 67	 */
 68	if (machine->asoc->hp_jack_gpio_active_low) {
 69		bool active_low = gpiod_is_active_low(machine->gpiod_hp_det);
 70
 71		machine->hp_jack_gpio->invert = !active_low;
 72	}
 73
 74	err = tegra_asoc_machine_init(rtd);
 75	if (err)
 76		return err;
 77
 78	if (!machine->gpiod_mic_det && machine->asoc->add_mic_jack) {
 79		struct snd_soc_dai *codec_dai = snd_soc_rtd_to_codec(rtd, 0);
 80		struct snd_soc_component *component = codec_dai->component;
 81		int shrt = 0;
 82
 83		err = snd_soc_card_jack_new_pins(rtd->card, "Mic Jack",
 84						 SND_JACK_MICROPHONE,
 85						 machine->mic_jack,
 86						 tegra_wm8903_mic_jack_pins,
 87						 ARRAY_SIZE(tegra_wm8903_mic_jack_pins));
 88		if (err) {
 89			dev_err(rtd->dev, "Mic Jack creation failed: %d\n", err);
 90			return err;
 91		}
 92
 93		if (of_property_read_bool(card->dev->of_node, "nvidia,headset"))
 94			shrt = SND_JACK_MICROPHONE;
 95
 96		wm8903_mic_detect(component, machine->mic_jack,
 97				  SND_JACK_MICROPHONE, shrt);
 98	}
 99
100	snd_soc_dapm_force_enable_pin(dapm, "MICBIAS");
101
102	return 0;
103}
104
105static int tegra_wm8903_remove(struct snd_soc_card *card)
106{
107	struct snd_soc_dai_link *link = &card->dai_link[0];
108	struct snd_soc_pcm_runtime *rtd = snd_soc_get_pcm_runtime(card, link);
109	struct snd_soc_dai *codec_dai = snd_soc_rtd_to_codec(rtd, 0);
110	struct snd_soc_component *component = codec_dai->component;
111
112	wm8903_mic_detect(component, NULL, 0, 0);
113
114	return 0;
115}
116
117SND_SOC_DAILINK_DEFS(hifi,
118	DAILINK_COMP_ARRAY(COMP_EMPTY()),
119	DAILINK_COMP_ARRAY(COMP_CODEC(NULL, "wm8903-hifi")),
120	DAILINK_COMP_ARRAY(COMP_EMPTY()));
121
122static struct snd_soc_dai_link tegra_wm8903_dai = {
123	.name = "WM8903",
124	.stream_name = "WM8903 PCM",
125	.init = tegra_wm8903_init,
126	.dai_fmt = SND_SOC_DAIFMT_I2S |
127		   SND_SOC_DAIFMT_NB_NF |
128		   SND_SOC_DAIFMT_CBC_CFC,
129	SND_SOC_DAILINK_REG(hifi),
130};
131
132static struct snd_soc_card snd_soc_tegra_wm8903 = {
133	.components = "codec:wm8903",
134	.owner = THIS_MODULE,
135	.dai_link = &tegra_wm8903_dai,
136	.num_links = 1,
137	.remove = tegra_wm8903_remove,
138	.fully_routed = true,
139};
140
141/* older device-trees used wrong polarity for the headphones-detection GPIO */
142static const struct tegra_asoc_data tegra_wm8903_data_legacy = {
143	.mclk_rate = tegra_wm8903_mclk_rate,
144	.card = &snd_soc_tegra_wm8903,
145	.hp_jack_gpio_active_low = true,
146	.add_common_dapm_widgets = true,
147	.add_common_controls = true,
148	.add_common_snd_ops = true,
149	.add_mic_jack = true,
150	.add_hp_jack = true,
151};
152
153static const struct tegra_asoc_data tegra_wm8903_data = {
154	.mclk_rate = tegra_wm8903_mclk_rate,
155	.card = &snd_soc_tegra_wm8903,
156	.add_common_dapm_widgets = true,
157	.add_common_controls = true,
158	.add_common_snd_ops = true,
159	.add_mic_jack = true,
160	.add_hp_jack = true,
161};
162
163static const struct of_device_id tegra_wm8903_of_match[] = {
164	{ .compatible = "ad,tegra-audio-plutux", .data = &tegra_wm8903_data_legacy },
165	{ .compatible = "ad,tegra-audio-wm8903-medcom-wide", .data = &tegra_wm8903_data_legacy },
166	{ .compatible = "ad,tegra-audio-wm8903-tec", .data = &tegra_wm8903_data_legacy },
167	{ .compatible = "nvidia,tegra-audio-wm8903-cardhu", .data = &tegra_wm8903_data_legacy },
168	{ .compatible = "nvidia,tegra-audio-wm8903-harmony", .data = &tegra_wm8903_data_legacy },
169	{ .compatible = "nvidia,tegra-audio-wm8903-picasso", .data = &tegra_wm8903_data_legacy },
170	{ .compatible = "nvidia,tegra-audio-wm8903-seaboard", .data = &tegra_wm8903_data_legacy },
171	{ .compatible = "nvidia,tegra-audio-wm8903-ventana", .data = &tegra_wm8903_data_legacy },
172	{ .compatible = "nvidia,tegra-audio-wm8903", .data = &tegra_wm8903_data },
173	{},
174};
175MODULE_DEVICE_TABLE(of, tegra_wm8903_of_match);
176
177static struct platform_driver tegra_wm8903_driver = {
178	.driver = {
179		.name = "tegra-wm8903",
180		.of_match_table = tegra_wm8903_of_match,
181		.pm = &snd_soc_pm_ops,
182	},
183	.probe = tegra_asoc_machine_probe,
184};
185module_platform_driver(tegra_wm8903_driver);
186
187MODULE_AUTHOR("Stephen Warren <swarren@nvidia.com>");
188MODULE_DESCRIPTION("Tegra+WM8903 machine ASoC driver");
189MODULE_LICENSE("GPL");