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 
30 static struct snd_soc_jack_pin tegra_wm8903_mic_jack_pins[] = {
31 	{ .pin = "Mic Jack", .mask = SND_JACK_MICROPHONE },
32 };
33 
tegra_wm8903_mclk_rate(unsigned int srate)34 static 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 
tegra_wm8903_init(struct snd_soc_pcm_runtime * rtd)55 static 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(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 
tegra_wm8903_remove(struct snd_soc_card * card)104 static 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 
116 SND_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 
121 static 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 
131 static 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 */
141 static 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 
152 static 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 
162 static 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 };
174 MODULE_DEVICE_TABLE(of, tegra_wm8903_of_match);
175 
176 static 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 };
184 module_platform_driver(tegra_wm8903_driver);
185 
186 MODULE_AUTHOR("Stephen Warren <swarren@nvidia.com>");
187 MODULE_DESCRIPTION("Tegra+WM8903 machine ASoC driver");
188 MODULE_LICENSE("GPL");
189