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	int err;
60
61	/*
62	 * Older version of machine driver was ignoring GPIO polarity,
63	 * forcing it to active-low.  This means that all older device-trees
64	 * which set the polarity to active-high are wrong and we need to fix
65	 * them up.
66	 */
67	if (machine->asoc->hp_jack_gpio_active_low) {
68		bool active_low = gpiod_is_active_low(machine->gpiod_hp_det);
69
70		machine->hp_jack_gpio->invert = !active_low;
71	}
72
73	err = tegra_asoc_machine_init(rtd);
74	if (err)
75		return err;
76
77	if (!machine->gpiod_mic_det && machine->asoc->add_mic_jack) {
78		struct snd_soc_dai *codec_dai = asoc_rtd_to_codec(rtd, 0);
79		struct snd_soc_component *component = codec_dai->component;
80		int shrt = 0;
81
82		err = snd_soc_card_jack_new_pins(rtd->card, "Mic Jack",
83						 SND_JACK_MICROPHONE,
84						 machine->mic_jack,
85						 tegra_wm8903_mic_jack_pins,
86						 ARRAY_SIZE(tegra_wm8903_mic_jack_pins));
87		if (err) {
88			dev_err(rtd->dev, "Mic Jack creation failed: %d\n", err);
89			return err;
90		}
91
92		if (of_property_read_bool(card->dev->of_node, "nvidia,headset"))
93			shrt = SND_JACK_MICROPHONE;
94
95		wm8903_mic_detect(component, machine->mic_jack,
96				  SND_JACK_MICROPHONE, shrt);
97	}
98
99	snd_soc_dapm_force_enable_pin(&card->dapm, "MICBIAS");
100
101	return 0;
102}
103
104static int tegra_wm8903_remove(struct snd_soc_card *card)
105{
106	struct snd_soc_dai_link *link = &card->dai_link[0];
107	struct snd_soc_pcm_runtime *rtd = snd_soc_get_pcm_runtime(card, link);
108	struct snd_soc_dai *codec_dai = asoc_rtd_to_codec(rtd, 0);
109	struct snd_soc_component *component = codec_dai->component;
110
111	wm8903_mic_detect(component, NULL, 0, 0);
112
113	return 0;
114}
115
116SND_SOC_DAILINK_DEFS(hifi,
117	DAILINK_COMP_ARRAY(COMP_EMPTY()),
118	DAILINK_COMP_ARRAY(COMP_CODEC(NULL, "wm8903-hifi")),
119	DAILINK_COMP_ARRAY(COMP_EMPTY()));
120
121static struct snd_soc_dai_link tegra_wm8903_dai = {
122	.name = "WM8903",
123	.stream_name = "WM8903 PCM",
124	.init = tegra_wm8903_init,
125	.dai_fmt = SND_SOC_DAIFMT_I2S |
126		   SND_SOC_DAIFMT_NB_NF |
127		   SND_SOC_DAIFMT_CBS_CFS,
128	SND_SOC_DAILINK_REG(hifi),
129};
130
131static struct snd_soc_card snd_soc_tegra_wm8903 = {
132	.components = "codec:wm8903",
133	.owner = THIS_MODULE,
134	.dai_link = &tegra_wm8903_dai,
135	.num_links = 1,
136	.remove = tegra_wm8903_remove,
137	.fully_routed = true,
138};
139
140/* older device-trees used wrong polarity for the headphones-detection GPIO */
141static const struct tegra_asoc_data tegra_wm8903_data_legacy = {
142	.mclk_rate = tegra_wm8903_mclk_rate,
143	.card = &snd_soc_tegra_wm8903,
144	.hp_jack_gpio_active_low = true,
145	.add_common_dapm_widgets = true,
146	.add_common_controls = true,
147	.add_common_snd_ops = true,
148	.add_mic_jack = true,
149	.add_hp_jack = true,
150};
151
152static const struct tegra_asoc_data tegra_wm8903_data = {
153	.mclk_rate = tegra_wm8903_mclk_rate,
154	.card = &snd_soc_tegra_wm8903,
155	.add_common_dapm_widgets = true,
156	.add_common_controls = true,
157	.add_common_snd_ops = true,
158	.add_mic_jack = true,
159	.add_hp_jack = true,
160};
161
162static const struct of_device_id tegra_wm8903_of_match[] = {
163	{ .compatible = "ad,tegra-audio-plutux", .data = &tegra_wm8903_data_legacy },
164	{ .compatible = "ad,tegra-audio-wm8903-medcom-wide", .data = &tegra_wm8903_data_legacy },
165	{ .compatible = "ad,tegra-audio-wm8903-tec", .data = &tegra_wm8903_data_legacy },
166	{ .compatible = "nvidia,tegra-audio-wm8903-cardhu", .data = &tegra_wm8903_data_legacy },
167	{ .compatible = "nvidia,tegra-audio-wm8903-harmony", .data = &tegra_wm8903_data_legacy },
168	{ .compatible = "nvidia,tegra-audio-wm8903-picasso", .data = &tegra_wm8903_data_legacy },
169	{ .compatible = "nvidia,tegra-audio-wm8903-seaboard", .data = &tegra_wm8903_data_legacy },
170	{ .compatible = "nvidia,tegra-audio-wm8903-ventana", .data = &tegra_wm8903_data_legacy },
171	{ .compatible = "nvidia,tegra-audio-wm8903", .data = &tegra_wm8903_data },
172	{},
173};
174MODULE_DEVICE_TABLE(of, tegra_wm8903_of_match);
175
176static struct platform_driver tegra_wm8903_driver = {
177	.driver = {
178		.name = "tegra-wm8903",
179		.of_match_table = tegra_wm8903_of_match,
180		.pm = &snd_soc_pm_ops,
181	},
182	.probe = tegra_asoc_machine_probe,
183};
184module_platform_driver(tegra_wm8903_driver);
185
186MODULE_AUTHOR("Stephen Warren <swarren@nvidia.com>");
187MODULE_DESCRIPTION("Tegra+WM8903 machine ASoC driver");
188MODULE_LICENSE("GPL");
189