1 /*
2 * tegra_sgtl5000.c - Tegra machine ASoC driver for boards using SGTL5000 codec
3 *
4 * Author: Marcel Ziswiler <marcel@ziswiler.com>
5 *
6 * This program is free software; you can redistribute it and/or modify it
7 * under the terms and conditions of the GNU General Public License,
8 * version 2, as published by the Free Software Foundation.
9 *
10 * This program is distributed in the hope it will be useful, but WITHOUT
11 * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
12 * FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License for
13 * more details.
14 *
15 * You should have received a copy of the GNU General Public License
16 * along with this program. If not, see <http://www.gnu.org/licenses/>.
17 *
18 * Based on code copyright/by:
19 *
20 * Copyright (C) 2010-2012 - NVIDIA, Inc.
21 * (c) 2009, 2010 Nvidia Graphics Pvt. Ltd.
22 * Copyright 2007 Wolfson Microelectronics PLC.
23 */
24
25 #include <linux/module.h>
26 #include <linux/platform_device.h>
27 #include <linux/slab.h>
28 #include <linux/gpio.h>
29 #include <linux/of_gpio.h>
30
31 #include <sound/core.h>
32 #include <sound/pcm.h>
33 #include <sound/pcm_params.h>
34 #include <sound/soc.h>
35
36 #include "../codecs/sgtl5000.h"
37
38 #include "tegra_asoc_utils.h"
39
40 #define DRV_NAME "tegra-snd-sgtl5000"
41
42 struct tegra_sgtl5000 {
43 struct tegra_asoc_utils_data util_data;
44 };
45
tegra_sgtl5000_hw_params(struct snd_pcm_substream * substream,struct snd_pcm_hw_params * params)46 static int tegra_sgtl5000_hw_params(struct snd_pcm_substream *substream,
47 struct snd_pcm_hw_params *params)
48 {
49 struct snd_soc_pcm_runtime *rtd = substream->private_data;
50 struct snd_soc_dai *codec_dai = rtd->codec_dai;
51 struct snd_soc_card *card = rtd->card;
52 struct tegra_sgtl5000 *machine = snd_soc_card_get_drvdata(card);
53 int srate, mclk;
54 int err;
55
56 srate = params_rate(params);
57 switch (srate) {
58 case 11025:
59 case 22050:
60 case 44100:
61 case 88200:
62 mclk = 11289600;
63 break;
64 default:
65 mclk = 12288000;
66 break;
67 }
68
69 err = tegra_asoc_utils_set_rate(&machine->util_data, srate, mclk);
70 if (err < 0) {
71 dev_err(card->dev, "Can't configure clocks\n");
72 return err;
73 }
74
75 err = snd_soc_dai_set_sysclk(codec_dai, SGTL5000_SYSCLK, mclk,
76 SND_SOC_CLOCK_IN);
77 if (err < 0) {
78 dev_err(card->dev, "codec_dai clock not set\n");
79 return err;
80 }
81
82 return 0;
83 }
84
85 static const struct snd_soc_ops tegra_sgtl5000_ops = {
86 .hw_params = tegra_sgtl5000_hw_params,
87 };
88
89 static const struct snd_soc_dapm_widget tegra_sgtl5000_dapm_widgets[] = {
90 SND_SOC_DAPM_HP("Headphone Jack", NULL),
91 SND_SOC_DAPM_LINE("Line In Jack", NULL),
92 SND_SOC_DAPM_MIC("Mic Jack", NULL),
93 };
94
95 static struct snd_soc_dai_link tegra_sgtl5000_dai = {
96 .name = "sgtl5000",
97 .stream_name = "HiFi",
98 .codec_dai_name = "sgtl5000",
99 .ops = &tegra_sgtl5000_ops,
100 .dai_fmt = SND_SOC_DAIFMT_I2S | SND_SOC_DAIFMT_NB_NF |
101 SND_SOC_DAIFMT_CBS_CFS,
102 };
103
104 static struct snd_soc_card snd_soc_tegra_sgtl5000 = {
105 .name = "tegra-sgtl5000",
106 .owner = THIS_MODULE,
107 .dai_link = &tegra_sgtl5000_dai,
108 .num_links = 1,
109 .dapm_widgets = tegra_sgtl5000_dapm_widgets,
110 .num_dapm_widgets = ARRAY_SIZE(tegra_sgtl5000_dapm_widgets),
111 .fully_routed = true,
112 };
113
tegra_sgtl5000_driver_probe(struct platform_device * pdev)114 static int tegra_sgtl5000_driver_probe(struct platform_device *pdev)
115 {
116 struct device_node *np = pdev->dev.of_node;
117 struct snd_soc_card *card = &snd_soc_tegra_sgtl5000;
118 struct tegra_sgtl5000 *machine;
119 int ret;
120
121 machine = devm_kzalloc(&pdev->dev, sizeof(struct tegra_sgtl5000),
122 GFP_KERNEL);
123 if (!machine)
124 return -ENOMEM;
125
126 card->dev = &pdev->dev;
127 snd_soc_card_set_drvdata(card, machine);
128
129 ret = snd_soc_of_parse_card_name(card, "nvidia,model");
130 if (ret)
131 goto err;
132
133 ret = snd_soc_of_parse_audio_routing(card, "nvidia,audio-routing");
134 if (ret)
135 goto err;
136
137 tegra_sgtl5000_dai.codec_of_node = of_parse_phandle(np,
138 "nvidia,audio-codec", 0);
139 if (!tegra_sgtl5000_dai.codec_of_node) {
140 dev_err(&pdev->dev,
141 "Property 'nvidia,audio-codec' missing or invalid\n");
142 ret = -EINVAL;
143 goto err;
144 }
145
146 tegra_sgtl5000_dai.cpu_of_node = of_parse_phandle(np,
147 "nvidia,i2s-controller", 0);
148 if (!tegra_sgtl5000_dai.cpu_of_node) {
149 dev_err(&pdev->dev,
150 "Property 'nvidia,i2s-controller' missing/invalid\n");
151 ret = -EINVAL;
152 goto err_put_codec_of_node;
153 }
154
155 tegra_sgtl5000_dai.platform_of_node = tegra_sgtl5000_dai.cpu_of_node;
156
157 ret = tegra_asoc_utils_init(&machine->util_data, &pdev->dev);
158 if (ret)
159 goto err_put_cpu_of_node;
160
161 ret = snd_soc_register_card(card);
162 if (ret) {
163 dev_err(&pdev->dev, "snd_soc_register_card failed (%d)\n",
164 ret);
165 goto err_fini_utils;
166 }
167
168 return 0;
169
170 err_fini_utils:
171 tegra_asoc_utils_fini(&machine->util_data);
172 err_put_cpu_of_node:
173 of_node_put(tegra_sgtl5000_dai.cpu_of_node);
174 tegra_sgtl5000_dai.cpu_of_node = NULL;
175 tegra_sgtl5000_dai.platform_of_node = NULL;
176 err_put_codec_of_node:
177 of_node_put(tegra_sgtl5000_dai.codec_of_node);
178 tegra_sgtl5000_dai.codec_of_node = NULL;
179 err:
180 return ret;
181 }
182
tegra_sgtl5000_driver_remove(struct platform_device * pdev)183 static int tegra_sgtl5000_driver_remove(struct platform_device *pdev)
184 {
185 struct snd_soc_card *card = platform_get_drvdata(pdev);
186 struct tegra_sgtl5000 *machine = snd_soc_card_get_drvdata(card);
187 int ret;
188
189 ret = snd_soc_unregister_card(card);
190
191 tegra_asoc_utils_fini(&machine->util_data);
192
193 of_node_put(tegra_sgtl5000_dai.cpu_of_node);
194 tegra_sgtl5000_dai.cpu_of_node = NULL;
195 tegra_sgtl5000_dai.platform_of_node = NULL;
196 of_node_put(tegra_sgtl5000_dai.codec_of_node);
197 tegra_sgtl5000_dai.codec_of_node = NULL;
198
199 return ret;
200 }
201
202 static const struct of_device_id tegra_sgtl5000_of_match[] = {
203 { .compatible = "nvidia,tegra-audio-sgtl5000", },
204 { /* sentinel */ },
205 };
206
207 static struct platform_driver tegra_sgtl5000_driver = {
208 .driver = {
209 .name = DRV_NAME,
210 .pm = &snd_soc_pm_ops,
211 .of_match_table = tegra_sgtl5000_of_match,
212 },
213 .probe = tegra_sgtl5000_driver_probe,
214 .remove = tegra_sgtl5000_driver_remove,
215 };
216 module_platform_driver(tegra_sgtl5000_driver);
217
218 MODULE_AUTHOR("Marcel Ziswiler <marcel@ziswiler.com>");
219 MODULE_DESCRIPTION("Tegra SGTL5000 machine ASoC driver");
220 MODULE_LICENSE("GPL v2");
221 MODULE_ALIAS("platform:" DRV_NAME);
222 MODULE_DEVICE_TABLE(of, tegra_sgtl5000_of_match);
223