2 * tegra_wm8753.c - Tegra machine ASoC driver for boards using WM8753 codec.
4 * Author: Stephen Warren <swarren@nvidia.com>
5 * Copyright (C) 2010-2012 - NVIDIA, Inc.
7 * Based on code copyright/by:
9 * (c) 2009, 2010 Nvidia Graphics Pvt. Ltd.
11 * Copyright 2007 Wolfson Microelectronics PLC.
12 * Author: Graeme Gregory
13 * graeme.gregory@wolfsonmicro.com or linux@wolfsonmicro.com
15 * This program is free software; you can redistribute it and/or
16 * modify it under the terms of the GNU General Public License
17 * version 2 as published by the Free Software Foundation.
19 * This program is distributed in the hope that it will be useful, but
20 * WITHOUT ANY WARRANTY; without even the implied warranty of
21 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
22 * General Public License for more details.
24 * You should have received a copy of the GNU General Public License
25 * along with this program; if not, write to the Free Software
26 * Foundation, Inc., 51 Franklin St, Fifth Floor, Boston, MA
31 #include <linux/module.h>
32 #include <linux/platform_device.h>
33 #include <linux/slab.h>
34 #include <linux/gpio.h>
35 #include <linux/of_gpio.h>
37 #include <sound/core.h>
38 #include <sound/jack.h>
39 #include <sound/pcm.h>
40 #include <sound/pcm_params.h>
41 #include <sound/soc.h>
43 #include "../codecs/wm8753.h"
45 #include "tegra_asoc_utils.h"
47 #define DRV_NAME "tegra-snd-wm8753"
50 struct tegra_asoc_utils_data util_data;
53 static int tegra_wm8753_hw_params(struct snd_pcm_substream *substream,
54 struct snd_pcm_hw_params *params)
56 struct snd_soc_pcm_runtime *rtd = substream->private_data;
57 struct snd_soc_dai *codec_dai = rtd->codec_dai;
58 struct snd_soc_card *card = rtd->card;
59 struct tegra_wm8753 *machine = snd_soc_card_get_drvdata(card);
63 srate = params_rate(params);
76 err = tegra_asoc_utils_set_rate(&machine->util_data, srate, mclk);
78 dev_err(card->dev, "Can't configure clocks\n");
82 err = snd_soc_dai_set_sysclk(codec_dai, WM8753_MCLK, mclk,
85 dev_err(card->dev, "codec_dai clock not set\n");
92 static struct snd_soc_ops tegra_wm8753_ops = {
93 .hw_params = tegra_wm8753_hw_params,
96 static const struct snd_soc_dapm_widget tegra_wm8753_dapm_widgets[] = {
97 SND_SOC_DAPM_HP("Headphone Jack", NULL),
98 SND_SOC_DAPM_MIC("Mic Jack", NULL),
101 static struct snd_soc_dai_link tegra_wm8753_dai = {
103 .stream_name = "WM8753 PCM",
104 .codec_dai_name = "wm8753-hifi",
105 .ops = &tegra_wm8753_ops,
106 .dai_fmt = SND_SOC_DAIFMT_I2S |
107 SND_SOC_DAIFMT_NB_NF |
108 SND_SOC_DAIFMT_CBS_CFS,
111 static struct snd_soc_card snd_soc_tegra_wm8753 = {
112 .name = "tegra-wm8753",
113 .owner = THIS_MODULE,
114 .dai_link = &tegra_wm8753_dai,
117 .dapm_widgets = tegra_wm8753_dapm_widgets,
118 .num_dapm_widgets = ARRAY_SIZE(tegra_wm8753_dapm_widgets),
119 .fully_routed = true,
122 static int tegra_wm8753_driver_probe(struct platform_device *pdev)
124 struct device_node *np = pdev->dev.of_node;
125 struct snd_soc_card *card = &snd_soc_tegra_wm8753;
126 struct tegra_wm8753 *machine;
129 machine = devm_kzalloc(&pdev->dev, sizeof(struct tegra_wm8753),
132 dev_err(&pdev->dev, "Can't allocate tegra_wm8753 struct\n");
136 card->dev = &pdev->dev;
137 platform_set_drvdata(pdev, card);
138 snd_soc_card_set_drvdata(card, machine);
140 ret = snd_soc_of_parse_card_name(card, "nvidia,model");
144 ret = snd_soc_of_parse_audio_routing(card, "nvidia,audio-routing");
148 tegra_wm8753_dai.codec_of_node = of_parse_phandle(np,
149 "nvidia,audio-codec", 0);
150 if (!tegra_wm8753_dai.codec_of_node) {
152 "Property 'nvidia,audio-codec' missing or invalid\n");
157 tegra_wm8753_dai.cpu_of_node = of_parse_phandle(np,
158 "nvidia,i2s-controller", 0);
159 if (!tegra_wm8753_dai.cpu_of_node) {
161 "Property 'nvidia,i2s-controller' missing or invalid\n");
166 tegra_wm8753_dai.platform_of_node = tegra_wm8753_dai.cpu_of_node;
168 ret = tegra_asoc_utils_init(&machine->util_data, &pdev->dev);
172 ret = snd_soc_register_card(card);
174 dev_err(&pdev->dev, "snd_soc_register_card failed (%d)\n",
182 tegra_asoc_utils_fini(&machine->util_data);
187 static int tegra_wm8753_driver_remove(struct platform_device *pdev)
189 struct snd_soc_card *card = platform_get_drvdata(pdev);
190 struct tegra_wm8753 *machine = snd_soc_card_get_drvdata(card);
192 snd_soc_unregister_card(card);
194 tegra_asoc_utils_fini(&machine->util_data);
199 static const struct of_device_id tegra_wm8753_of_match[] = {
200 { .compatible = "nvidia,tegra-audio-wm8753", },
204 static struct platform_driver tegra_wm8753_driver = {
207 .pm = &snd_soc_pm_ops,
208 .of_match_table = tegra_wm8753_of_match,
210 .probe = tegra_wm8753_driver_probe,
211 .remove = tegra_wm8753_driver_remove,
213 module_platform_driver(tegra_wm8753_driver);
215 MODULE_AUTHOR("Stephen Warren <swarren@nvidia.com>");
216 MODULE_DESCRIPTION("Tegra+WM8753 machine ASoC driver");
217 MODULE_LICENSE("GPL");
218 MODULE_ALIAS("platform:" DRV_NAME);
219 MODULE_DEVICE_TABLE(of, tegra_wm8753_of_match);