1 /*
2 * tegra_rt5640.c - Tegra machine ASoC driver for boards using RT5640 codec.
3 *
4 * Copyright (c) 2013, NVIDIA CORPORATION. All rights reserved.
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 * Copyright (C) 2011 The AC100 Kernel Team <ac100@lists.lauchpad.net>
22 * (c) 2009, 2010 Nvidia Graphics Pvt. Ltd.
23 * Copyright 2007 Wolfson Microelectronics PLC.
24 */
25
26 #include <linux/module.h>
27 #include <linux/platform_device.h>
28 #include <linux/slab.h>
29 #include <linux/gpio.h>
30 #include <linux/of_gpio.h>
31
32 #include <sound/core.h>
33 #include <sound/jack.h>
34 #include <sound/pcm.h>
35 #include <sound/pcm_params.h>
36 #include <sound/soc.h>
37
38 #include "../codecs/rt5640.h"
39
40 #include "tegra_asoc_utils.h"
41
42 #define DRV_NAME "tegra-snd-rt5640"
43
44 struct tegra_rt5640 {
45 struct tegra_asoc_utils_data util_data;
46 int gpio_hp_det;
47 enum of_gpio_flags gpio_hp_det_flags;
48 };
49
tegra_rt5640_asoc_hw_params(struct snd_pcm_substream * substream,struct snd_pcm_hw_params * params)50 static int tegra_rt5640_asoc_hw_params(struct snd_pcm_substream *substream,
51 struct snd_pcm_hw_params *params)
52 {
53 struct snd_soc_pcm_runtime *rtd = substream->private_data;
54 struct snd_soc_dai *codec_dai = rtd->codec_dai;
55 struct snd_soc_card *card = rtd->card;
56 struct tegra_rt5640 *machine = snd_soc_card_get_drvdata(card);
57 int srate, mclk;
58 int err;
59
60 srate = params_rate(params);
61 mclk = 256 * srate;
62
63 err = tegra_asoc_utils_set_rate(&machine->util_data, srate, mclk);
64 if (err < 0) {
65 dev_err(card->dev, "Can't configure clocks\n");
66 return err;
67 }
68
69 err = snd_soc_dai_set_sysclk(codec_dai, RT5640_SCLK_S_MCLK, mclk,
70 SND_SOC_CLOCK_IN);
71 if (err < 0) {
72 dev_err(card->dev, "codec_dai clock not set\n");
73 return err;
74 }
75
76 return 0;
77 }
78
79 static const struct snd_soc_ops tegra_rt5640_ops = {
80 .hw_params = tegra_rt5640_asoc_hw_params,
81 };
82
83 static struct snd_soc_jack tegra_rt5640_hp_jack;
84
85 static struct snd_soc_jack_pin tegra_rt5640_hp_jack_pins[] = {
86 {
87 .pin = "Headphones",
88 .mask = SND_JACK_HEADPHONE,
89 },
90 };
91
92 static struct snd_soc_jack_gpio tegra_rt5640_hp_jack_gpio = {
93 .name = "Headphone detection",
94 .report = SND_JACK_HEADPHONE,
95 .debounce_time = 150,
96 .invert = 1,
97 };
98
99 static const struct snd_soc_dapm_widget tegra_rt5640_dapm_widgets[] = {
100 SND_SOC_DAPM_HP("Headphones", NULL),
101 SND_SOC_DAPM_SPK("Speakers", NULL),
102 SND_SOC_DAPM_MIC("Mic Jack", NULL),
103 };
104
105 static const struct snd_kcontrol_new tegra_rt5640_controls[] = {
106 SOC_DAPM_PIN_SWITCH("Speakers"),
107 };
108
tegra_rt5640_asoc_init(struct snd_soc_pcm_runtime * rtd)109 static int tegra_rt5640_asoc_init(struct snd_soc_pcm_runtime *rtd)
110 {
111 struct tegra_rt5640 *machine = snd_soc_card_get_drvdata(rtd->card);
112
113 snd_soc_card_jack_new(rtd->card, "Headphones", SND_JACK_HEADPHONE,
114 &tegra_rt5640_hp_jack, tegra_rt5640_hp_jack_pins,
115 ARRAY_SIZE(tegra_rt5640_hp_jack_pins));
116
117 if (gpio_is_valid(machine->gpio_hp_det)) {
118 tegra_rt5640_hp_jack_gpio.gpio = machine->gpio_hp_det;
119 tegra_rt5640_hp_jack_gpio.invert =
120 !!(machine->gpio_hp_det_flags & OF_GPIO_ACTIVE_LOW);
121 snd_soc_jack_add_gpios(&tegra_rt5640_hp_jack,
122 1,
123 &tegra_rt5640_hp_jack_gpio);
124 }
125
126 return 0;
127 }
128
129 static struct snd_soc_dai_link tegra_rt5640_dai = {
130 .name = "RT5640",
131 .stream_name = "RT5640 PCM",
132 .codec_dai_name = "rt5640-aif1",
133 .init = tegra_rt5640_asoc_init,
134 .ops = &tegra_rt5640_ops,
135 .dai_fmt = SND_SOC_DAIFMT_I2S | SND_SOC_DAIFMT_NB_NF |
136 SND_SOC_DAIFMT_CBS_CFS,
137 };
138
139 static struct snd_soc_card snd_soc_tegra_rt5640 = {
140 .name = "tegra-rt5640",
141 .owner = THIS_MODULE,
142 .dai_link = &tegra_rt5640_dai,
143 .num_links = 1,
144 .controls = tegra_rt5640_controls,
145 .num_controls = ARRAY_SIZE(tegra_rt5640_controls),
146 .dapm_widgets = tegra_rt5640_dapm_widgets,
147 .num_dapm_widgets = ARRAY_SIZE(tegra_rt5640_dapm_widgets),
148 .fully_routed = true,
149 };
150
tegra_rt5640_probe(struct platform_device * pdev)151 static int tegra_rt5640_probe(struct platform_device *pdev)
152 {
153 struct device_node *np = pdev->dev.of_node;
154 struct snd_soc_card *card = &snd_soc_tegra_rt5640;
155 struct tegra_rt5640 *machine;
156 int ret;
157
158 machine = devm_kzalloc(&pdev->dev,
159 sizeof(struct tegra_rt5640), GFP_KERNEL);
160 if (!machine)
161 return -ENOMEM;
162
163 card->dev = &pdev->dev;
164 snd_soc_card_set_drvdata(card, machine);
165
166 machine->gpio_hp_det = of_get_named_gpio_flags(
167 np, "nvidia,hp-det-gpios", 0, &machine->gpio_hp_det_flags);
168 if (machine->gpio_hp_det == -EPROBE_DEFER)
169 return -EPROBE_DEFER;
170
171 ret = snd_soc_of_parse_card_name(card, "nvidia,model");
172 if (ret)
173 goto err;
174
175 ret = snd_soc_of_parse_audio_routing(card, "nvidia,audio-routing");
176 if (ret)
177 goto err;
178
179 tegra_rt5640_dai.codec_of_node = of_parse_phandle(np,
180 "nvidia,audio-codec", 0);
181 if (!tegra_rt5640_dai.codec_of_node) {
182 dev_err(&pdev->dev,
183 "Property 'nvidia,audio-codec' missing or invalid\n");
184 ret = -EINVAL;
185 goto err;
186 }
187
188 tegra_rt5640_dai.cpu_of_node = of_parse_phandle(np,
189 "nvidia,i2s-controller", 0);
190 if (!tegra_rt5640_dai.cpu_of_node) {
191 dev_err(&pdev->dev,
192 "Property 'nvidia,i2s-controller' missing or invalid\n");
193 ret = -EINVAL;
194 goto err;
195 }
196
197 tegra_rt5640_dai.platform_of_node = tegra_rt5640_dai.cpu_of_node;
198
199 ret = tegra_asoc_utils_init(&machine->util_data, &pdev->dev);
200 if (ret)
201 goto err;
202
203 ret = snd_soc_register_card(card);
204 if (ret) {
205 dev_err(&pdev->dev, "snd_soc_register_card failed (%d)\n",
206 ret);
207 goto err_fini_utils;
208 }
209
210 return 0;
211
212 err_fini_utils:
213 tegra_asoc_utils_fini(&machine->util_data);
214 err:
215 return ret;
216 }
217
tegra_rt5640_remove(struct platform_device * pdev)218 static int tegra_rt5640_remove(struct platform_device *pdev)
219 {
220 struct snd_soc_card *card = platform_get_drvdata(pdev);
221 struct tegra_rt5640 *machine = snd_soc_card_get_drvdata(card);
222
223 snd_soc_unregister_card(card);
224
225 tegra_asoc_utils_fini(&machine->util_data);
226
227 return 0;
228 }
229
230 static const struct of_device_id tegra_rt5640_of_match[] = {
231 { .compatible = "nvidia,tegra-audio-rt5640", },
232 {},
233 };
234
235 static struct platform_driver tegra_rt5640_driver = {
236 .driver = {
237 .name = DRV_NAME,
238 .pm = &snd_soc_pm_ops,
239 .of_match_table = tegra_rt5640_of_match,
240 },
241 .probe = tegra_rt5640_probe,
242 .remove = tegra_rt5640_remove,
243 };
244 module_platform_driver(tegra_rt5640_driver);
245
246 MODULE_AUTHOR("Stephen Warren <swarren@nvidia.com>");
247 MODULE_DESCRIPTION("Tegra+RT5640 machine ASoC driver");
248 MODULE_LICENSE("GPL v2");
249 MODULE_ALIAS("platform:" DRV_NAME);
250 MODULE_DEVICE_TABLE(of, tegra_rt5640_of_match);
251