1 /*
2 * tegra_wm8753.c - Tegra machine ASoC driver for boards using WM8753 codec.
3 *
4 * Author: Stephen Warren <swarren@nvidia.com>
5 * Copyright (C) 2010-2012 - NVIDIA, Inc.
6 *
7 * Based on code copyright/by:
8 *
9 * (c) 2009, 2010 Nvidia Graphics Pvt. Ltd.
10 *
11 * Copyright 2007 Wolfson Microelectronics PLC.
12 * Author: Graeme Gregory
13 * graeme.gregory@wolfsonmicro.com or linux@wolfsonmicro.com
14 *
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.
18 *
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.
23 *
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
27 * 02110-1301 USA
28 *
29 */
30
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>
36
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>
42
43 #include "../codecs/wm8753.h"
44
45 #include "tegra_asoc_utils.h"
46
47 #define DRV_NAME "tegra-snd-wm8753"
48
49 struct tegra_wm8753 {
50 struct tegra_asoc_utils_data util_data;
51 };
52
tegra_wm8753_hw_params(struct snd_pcm_substream * substream,struct snd_pcm_hw_params * params)53 static int tegra_wm8753_hw_params(struct snd_pcm_substream *substream,
54 struct snd_pcm_hw_params *params)
55 {
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);
60 int srate, mclk;
61 int err;
62
63 srate = params_rate(params);
64 switch (srate) {
65 case 11025:
66 case 22050:
67 case 44100:
68 case 88200:
69 mclk = 11289600;
70 break;
71 default:
72 mclk = 12288000;
73 break;
74 }
75
76 err = tegra_asoc_utils_set_rate(&machine->util_data, srate, mclk);
77 if (err < 0) {
78 dev_err(card->dev, "Can't configure clocks\n");
79 return err;
80 }
81
82 err = snd_soc_dai_set_sysclk(codec_dai, WM8753_MCLK, mclk,
83 SND_SOC_CLOCK_IN);
84 if (err < 0) {
85 dev_err(card->dev, "codec_dai clock not set\n");
86 return err;
87 }
88
89 return 0;
90 }
91
92 static struct snd_soc_ops tegra_wm8753_ops = {
93 .hw_params = tegra_wm8753_hw_params,
94 };
95
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),
99 };
100
101 static struct snd_soc_dai_link tegra_wm8753_dai = {
102 .name = "WM8753",
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,
109 };
110
111 static struct snd_soc_card snd_soc_tegra_wm8753 = {
112 .name = "tegra-wm8753",
113 .owner = THIS_MODULE,
114 .dai_link = &tegra_wm8753_dai,
115 .num_links = 1,
116
117 .dapm_widgets = tegra_wm8753_dapm_widgets,
118 .num_dapm_widgets = ARRAY_SIZE(tegra_wm8753_dapm_widgets),
119 .fully_routed = true,
120 };
121
tegra_wm8753_driver_probe(struct platform_device * pdev)122 static int tegra_wm8753_driver_probe(struct platform_device *pdev)
123 {
124 struct device_node *np = pdev->dev.of_node;
125 struct snd_soc_card *card = &snd_soc_tegra_wm8753;
126 struct tegra_wm8753 *machine;
127 int ret;
128
129 machine = devm_kzalloc(&pdev->dev, sizeof(struct tegra_wm8753),
130 GFP_KERNEL);
131 if (!machine) {
132 dev_err(&pdev->dev, "Can't allocate tegra_wm8753 struct\n");
133 return -ENOMEM;
134 }
135
136 card->dev = &pdev->dev;
137 platform_set_drvdata(pdev, card);
138 snd_soc_card_set_drvdata(card, machine);
139
140 ret = snd_soc_of_parse_card_name(card, "nvidia,model");
141 if (ret)
142 goto err;
143
144 ret = snd_soc_of_parse_audio_routing(card, "nvidia,audio-routing");
145 if (ret)
146 goto err;
147
148 tegra_wm8753_dai.codec_of_node = of_parse_phandle(np,
149 "nvidia,audio-codec", 0);
150 if (!tegra_wm8753_dai.codec_of_node) {
151 dev_err(&pdev->dev,
152 "Property 'nvidia,audio-codec' missing or invalid\n");
153 ret = -EINVAL;
154 goto err;
155 }
156
157 tegra_wm8753_dai.cpu_of_node = of_parse_phandle(np,
158 "nvidia,i2s-controller", 0);
159 if (!tegra_wm8753_dai.cpu_of_node) {
160 dev_err(&pdev->dev,
161 "Property 'nvidia,i2s-controller' missing or invalid\n");
162 ret = -EINVAL;
163 goto err;
164 }
165
166 tegra_wm8753_dai.platform_of_node = tegra_wm8753_dai.cpu_of_node;
167
168 ret = tegra_asoc_utils_init(&machine->util_data, &pdev->dev);
169 if (ret)
170 goto err;
171
172 ret = snd_soc_register_card(card);
173 if (ret) {
174 dev_err(&pdev->dev, "snd_soc_register_card failed (%d)\n",
175 ret);
176 goto err_fini_utils;
177 }
178
179 return 0;
180
181 err_fini_utils:
182 tegra_asoc_utils_fini(&machine->util_data);
183 err:
184 return ret;
185 }
186
tegra_wm8753_driver_remove(struct platform_device * pdev)187 static int tegra_wm8753_driver_remove(struct platform_device *pdev)
188 {
189 struct snd_soc_card *card = platform_get_drvdata(pdev);
190 struct tegra_wm8753 *machine = snd_soc_card_get_drvdata(card);
191
192 snd_soc_unregister_card(card);
193
194 tegra_asoc_utils_fini(&machine->util_data);
195
196 return 0;
197 }
198
199 static const struct of_device_id tegra_wm8753_of_match[] = {
200 { .compatible = "nvidia,tegra-audio-wm8753", },
201 {},
202 };
203
204 static struct platform_driver tegra_wm8753_driver = {
205 .driver = {
206 .name = DRV_NAME,
207 .owner = THIS_MODULE,
208 .pm = &snd_soc_pm_ops,
209 .of_match_table = tegra_wm8753_of_match,
210 },
211 .probe = tegra_wm8753_driver_probe,
212 .remove = tegra_wm8753_driver_remove,
213 };
214 module_platform_driver(tegra_wm8753_driver);
215
216 MODULE_AUTHOR("Stephen Warren <swarren@nvidia.com>");
217 MODULE_DESCRIPTION("Tegra+WM8753 machine ASoC driver");
218 MODULE_LICENSE("GPL");
219 MODULE_ALIAS("platform:" DRV_NAME);
220 MODULE_DEVICE_TABLE(of, tegra_wm8753_of_match);
221