summaryrefslogtreecommitdiffstats
path: root/sound/soc/tegra/tegra_wm8903.c
blob: b3cd0a34da6371e055bcd6d347a1973af3d22c3c (plain)
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
75
76
77
78
79
80
81
82
83
84
85
86
87
88
89
90
91
92
93
94
95
96
97
98
99
100
101
102
103
104
105
106
107
108
109
110
111
112
113
114
115
116
117
118
119
120
121
122
123
124
125
126
127
128
129
130
131
132
133
134
135
136
137
138
139
140
141
142
143
144
145
146
147
148
149
150
151
152
153
154
155
156
157
158
159
160
161
162
163
164
165
166
167
168
169
170
171
172
173
174
175
176
177
178
179
180
181
182
183
184
185
186
187
188
// SPDX-License-Identifier: GPL-2.0-only
/*
 * tegra_wm8903.c - Tegra machine ASoC driver for boards using WM8903 codec.
 *
 * Author: Stephen Warren <swarren@nvidia.com>
 * Copyright (C) 2010-2012 - NVIDIA, Inc.
 *
 * Based on code copyright/by:
 *
 * (c) 2009, 2010 Nvidia Graphics Pvt. Ltd.
 *
 * Copyright 2007 Wolfson Microelectronics PLC.
 * Author: Graeme Gregory
 *         graeme.gregory@wolfsonmicro.com or linux@wolfsonmicro.com
 */

#include <linux/gpio/consumer.h>
#include <linux/of.h>
#include <linux/module.h>
#include <linux/platform_device.h>

#include <sound/core.h>
#include <sound/jack.h>
#include <sound/soc.h>

#include "../codecs/wm8903.h"

#include "tegra_asoc_machine.h"

static struct snd_soc_jack_pin tegra_wm8903_mic_jack_pins[] = {
	{ .pin = "Mic Jack", .mask = SND_JACK_MICROPHONE },
};

static unsigned int tegra_wm8903_mclk_rate(unsigned int srate)
{
	unsigned int mclk;

	switch (srate) {
	case 64000:
	case 88200:
	case 96000:
		mclk = 128 * srate;
		break;
	default:
		mclk = 256 * srate;
		break;
	}
	/* FIXME: Codec only requires >= 3MHz if OSR==0 */
	while (mclk < 6000000)
		mclk *= 2;

	return mclk;
}

static int tegra_wm8903_init(struct snd_soc_pcm_runtime *rtd)
{
	struct tegra_machine *machine = snd_soc_card_get_drvdata(rtd->card);
	struct snd_soc_card *card = rtd->card;
	int err;

	/*
	 * Older version of machine driver was ignoring GPIO polarity,
	 * forcing it to active-low.  This means that all older device-trees
	 * which set the polarity to active-high are wrong and we need to fix
	 * them up.
	 */
	if (machine->asoc->hp_jack_gpio_active_low) {
		bool active_low = gpiod_is_active_low(machine->gpiod_hp_det);

		machine->hp_jack_gpio->invert = !active_low;
	}

	err = tegra_asoc_machine_init(rtd);
	if (err)
		return err;

	if (!machine->gpiod_mic_det && machine->asoc->add_mic_jack) {
		struct snd_soc_dai *codec_dai = asoc_rtd_to_codec(rtd, 0);
		struct snd_soc_component *component = codec_dai->component;
		int shrt = 0;

		err = snd_soc_card_jack_new_pins(rtd->card, "Mic Jack",
						 SND_JACK_MICROPHONE,
						 machine->mic_jack,
						 tegra_wm8903_mic_jack_pins,
						 ARRAY_SIZE(tegra_wm8903_mic_jack_pins));
		if (err) {
			dev_err(rtd->dev, "Mic Jack creation failed: %d\n", err);
			return err;
		}

		if (of_property_read_bool(card->dev->of_node, "nvidia,headset"))
			shrt = SND_JACK_MICROPHONE;

		wm8903_mic_detect(component, machine->mic_jack,
				  SND_JACK_MICROPHONE, shrt);
	}

	snd_soc_dapm_force_enable_pin(&card->dapm, "MICBIAS");

	return 0;
}

static int tegra_wm8903_remove(struct snd_soc_card *card)
{
	struct snd_soc_dai_link *link = &card->dai_link[0];
	struct snd_soc_pcm_runtime *rtd = snd_soc_get_pcm_runtime(card, link);
	struct snd_soc_dai *codec_dai = asoc_rtd_to_codec(rtd, 0);
	struct snd_soc_component *component = codec_dai->component;

	wm8903_mic_detect(component, NULL, 0, 0);

	return 0;
}

SND_SOC_DAILINK_DEFS(hifi,
	DAILINK_COMP_ARRAY(COMP_EMPTY()),
	DAILINK_COMP_ARRAY(COMP_CODEC(NULL, "wm8903-hifi")),
	DAILINK_COMP_ARRAY(COMP_EMPTY()));

static struct snd_soc_dai_link tegra_wm8903_dai = {
	.name = "WM8903",
	.stream_name = "WM8903 PCM",
	.init = tegra_wm8903_init,
	.dai_fmt = SND_SOC_DAIFMT_I2S |
		   SND_SOC_DAIFMT_NB_NF |
		   SND_SOC_DAIFMT_CBS_CFS,
	SND_SOC_DAILINK_REG(hifi),
};

static struct snd_soc_card snd_soc_tegra_wm8903 = {
	.components = "codec:wm8903",
	.owner = THIS_MODULE,
	.dai_link = &tegra_wm8903_dai,
	.num_links = 1,
	.remove = tegra_wm8903_remove,
	.fully_routed = true,
};

/* older device-trees used wrong polarity for the headphones-detection GPIO */
static const struct tegra_asoc_data tegra_wm8903_data_legacy = {
	.mclk_rate = tegra_wm8903_mclk_rate,
	.card = &snd_soc_tegra_wm8903,
	.hp_jack_gpio_active_low = true,
	.add_common_dapm_widgets = true,
	.add_common_controls = true,
	.add_common_snd_ops = true,
	.add_mic_jack = true,
	.add_hp_jack = true,
};

static const struct tegra_asoc_data tegra_wm8903_data = {
	.mclk_rate = tegra_wm8903_mclk_rate,
	.card = &snd_soc_tegra_wm8903,
	.add_common_dapm_widgets = true,
	.add_common_controls = true,
	.add_common_snd_ops = true,
	.add_mic_jack = true,
	.add_hp_jack = true,
};

static const struct of_device_id tegra_wm8903_of_match[] = {
	{ .compatible = "ad,tegra-audio-plutux", .data = &tegra_wm8903_data_legacy },
	{ .compatible = "ad,tegra-audio-wm8903-medcom-wide", .data = &tegra_wm8903_data_legacy },
	{ .compatible = "ad,tegra-audio-wm8903-tec", .data = &tegra_wm8903_data_legacy },
	{ .compatible = "nvidia,tegra-audio-wm8903-cardhu", .data = &tegra_wm8903_data_legacy },
	{ .compatible = "nvidia,tegra-audio-wm8903-harmony", .data = &tegra_wm8903_data_legacy },
	{ .compatible = "nvidia,tegra-audio-wm8903-picasso", .data = &tegra_wm8903_data_legacy },
	{ .compatible = "nvidia,tegra-audio-wm8903-seaboard", .data = &tegra_wm8903_data_legacy },
	{ .compatible = "nvidia,tegra-audio-wm8903-ventana", .data = &tegra_wm8903_data_legacy },
	{ .compatible = "nvidia,tegra-audio-wm8903", .data = &tegra_wm8903_data },
	{},
};
MODULE_DEVICE_TABLE(of, tegra_wm8903_of_match);

static struct platform_driver tegra_wm8903_driver = {
	.driver = {
		.name = "tegra-wm8903",
		.of_match_table = tegra_wm8903_of_match,
		.pm = &snd_soc_pm_ops,
	},
	.probe = tegra_asoc_machine_probe,
};
module_platform_driver(tegra_wm8903_driver);

MODULE_AUTHOR("Stephen Warren <swarren@nvidia.com>");
MODULE_DESCRIPTION("Tegra+WM8903 machine ASoC driver");
MODULE_LICENSE("GPL");