1/*
2* tegra_rt5677.c - Tegra machine ASoC driver for boards using RT5677 codec.
3 *
4 * Copyright (c) 2014, The Chromium OS Authors.  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/rt5677.h"
39
40#include "tegra_asoc_utils.h"
41
42#define DRV_NAME "tegra-snd-rt5677"
43
44struct tegra_rt5677 {
45	struct tegra_asoc_utils_data util_data;
46	int gpio_hp_det;
47	int gpio_hp_en;
48	int gpio_mic_present;
49	int gpio_dmic_clk_en;
50};
51
52static int tegra_rt5677_asoc_hw_params(struct snd_pcm_substream *substream,
53					struct snd_pcm_hw_params *params)
54{
55	struct snd_soc_pcm_runtime *rtd = substream->private_data;
56	struct snd_soc_dai *codec_dai = rtd->codec_dai;
57	struct snd_soc_card *card = rtd->card;
58	struct tegra_rt5677 *machine = snd_soc_card_get_drvdata(card);
59	int srate, mclk, err;
60
61	srate = params_rate(params);
62	mclk = 256 * srate;
63
64	err = tegra_asoc_utils_set_rate(&machine->util_data, srate, mclk);
65	if (err < 0) {
66		dev_err(card->dev, "Can't configure clocks\n");
67		return err;
68	}
69
70	err = snd_soc_dai_set_sysclk(codec_dai, RT5677_SCLK_S_MCLK, mclk,
71					SND_SOC_CLOCK_IN);
72	if (err < 0) {
73		dev_err(card->dev, "codec_dai clock not set\n");
74		return err;
75	}
76
77	return 0;
78}
79
80static int tegra_rt5677_event_hp(struct snd_soc_dapm_widget *w,
81			struct snd_kcontrol *k, int event)
82{
83	struct snd_soc_dapm_context *dapm = w->dapm;
84	struct snd_soc_card *card = dapm->card;
85	struct tegra_rt5677 *machine = snd_soc_card_get_drvdata(card);
86
87	if (!gpio_is_valid(machine->gpio_hp_en))
88		return 0;
89
90	gpio_set_value_cansleep(machine->gpio_hp_en,
91		SND_SOC_DAPM_EVENT_ON(event));
92
93	return 0;
94}
95
96static struct snd_soc_ops tegra_rt5677_ops = {
97	.hw_params = tegra_rt5677_asoc_hw_params,
98};
99
100static struct snd_soc_jack tegra_rt5677_hp_jack;
101
102static struct snd_soc_jack_pin tegra_rt5677_hp_jack_pins = {
103	.pin = "Headphone",
104	.mask = SND_JACK_HEADPHONE,
105};
106static struct snd_soc_jack_gpio tegra_rt5677_hp_jack_gpio = {
107	.name = "Headphone detection",
108	.report = SND_JACK_HEADPHONE,
109	.debounce_time = 150,
110};
111
112static struct snd_soc_jack tegra_rt5677_mic_jack;
113
114static struct snd_soc_jack_pin tegra_rt5677_mic_jack_pins = {
115	.pin = "Headset Mic",
116	.mask = SND_JACK_MICROPHONE,
117};
118
119static struct snd_soc_jack_gpio tegra_rt5677_mic_jack_gpio = {
120	.name = "Headset Mic detection",
121	.report = SND_JACK_MICROPHONE,
122	.debounce_time = 150,
123	.invert = 1
124};
125
126static const struct snd_soc_dapm_widget tegra_rt5677_dapm_widgets[] = {
127	SND_SOC_DAPM_SPK("Speaker", NULL),
128	SND_SOC_DAPM_HP("Headphone", tegra_rt5677_event_hp),
129	SND_SOC_DAPM_MIC("Headset Mic", NULL),
130	SND_SOC_DAPM_MIC("Internal Mic 1", NULL),
131	SND_SOC_DAPM_MIC("Internal Mic 2", NULL),
132};
133
134static const struct snd_kcontrol_new tegra_rt5677_controls[] = {
135	SOC_DAPM_PIN_SWITCH("Speaker"),
136	SOC_DAPM_PIN_SWITCH("Headphone"),
137	SOC_DAPM_PIN_SWITCH("Headset Mic"),
138	SOC_DAPM_PIN_SWITCH("Internal Mic 1"),
139	SOC_DAPM_PIN_SWITCH("Internal Mic 2"),
140};
141
142static int tegra_rt5677_asoc_init(struct snd_soc_pcm_runtime *rtd)
143{
144	struct tegra_rt5677 *machine = snd_soc_card_get_drvdata(rtd->card);
145
146	snd_soc_card_jack_new(rtd->card, "Headphone Jack", SND_JACK_HEADPHONE,
147			      &tegra_rt5677_hp_jack,
148			      &tegra_rt5677_hp_jack_pins, 1);
149
150	if (gpio_is_valid(machine->gpio_hp_det)) {
151		tegra_rt5677_hp_jack_gpio.gpio = machine->gpio_hp_det;
152		snd_soc_jack_add_gpios(&tegra_rt5677_hp_jack, 1,
153				&tegra_rt5677_hp_jack_gpio);
154	}
155
156
157	snd_soc_card_jack_new(rtd->card, "Mic Jack", SND_JACK_MICROPHONE,
158			      &tegra_rt5677_mic_jack,
159			      &tegra_rt5677_mic_jack_pins, 1);
160
161	if (gpio_is_valid(machine->gpio_mic_present)) {
162		tegra_rt5677_mic_jack_gpio.gpio = machine->gpio_mic_present;
163		snd_soc_jack_add_gpios(&tegra_rt5677_mic_jack, 1,
164				&tegra_rt5677_mic_jack_gpio);
165	}
166
167	snd_soc_dapm_force_enable_pin(&rtd->card->dapm, "MICBIAS1");
168
169	return 0;
170}
171
172static int tegra_rt5677_card_remove(struct snd_soc_card *card)
173{
174	struct tegra_rt5677 *machine = snd_soc_card_get_drvdata(card);
175
176	if (gpio_is_valid(machine->gpio_hp_det)) {
177		snd_soc_jack_free_gpios(&tegra_rt5677_hp_jack, 1,
178				&tegra_rt5677_hp_jack_gpio);
179	}
180
181	if (gpio_is_valid(machine->gpio_mic_present)) {
182		snd_soc_jack_free_gpios(&tegra_rt5677_mic_jack, 1,
183				&tegra_rt5677_mic_jack_gpio);
184	}
185
186	return 0;
187}
188
189static struct snd_soc_dai_link tegra_rt5677_dai = {
190	.name = "RT5677",
191	.stream_name = "RT5677 PCM",
192	.codec_dai_name = "rt5677-aif1",
193	.init = tegra_rt5677_asoc_init,
194	.ops = &tegra_rt5677_ops,
195	.dai_fmt = SND_SOC_DAIFMT_I2S | SND_SOC_DAIFMT_NB_NF |
196			SND_SOC_DAIFMT_CBS_CFS,
197};
198
199static struct snd_soc_card snd_soc_tegra_rt5677 = {
200	.name = "tegra-rt5677",
201	.owner = THIS_MODULE,
202	.remove = tegra_rt5677_card_remove,
203	.dai_link = &tegra_rt5677_dai,
204	.num_links = 1,
205	.controls = tegra_rt5677_controls,
206	.num_controls = ARRAY_SIZE(tegra_rt5677_controls),
207	.dapm_widgets = tegra_rt5677_dapm_widgets,
208	.num_dapm_widgets = ARRAY_SIZE(tegra_rt5677_dapm_widgets),
209	.fully_routed = true,
210};
211
212static int tegra_rt5677_probe(struct platform_device *pdev)
213{
214	struct device_node *np = pdev->dev.of_node;
215	struct snd_soc_card *card = &snd_soc_tegra_rt5677;
216	struct tegra_rt5677 *machine;
217	int ret;
218
219	machine = devm_kzalloc(&pdev->dev,
220			sizeof(struct tegra_rt5677), GFP_KERNEL);
221	if (!machine)
222		return -ENOMEM;
223
224	card->dev = &pdev->dev;
225	platform_set_drvdata(pdev, card);
226	snd_soc_card_set_drvdata(card, machine);
227
228	machine->gpio_hp_det = of_get_named_gpio(np, "nvidia,hp-det-gpios", 0);
229	if (machine->gpio_hp_det == -EPROBE_DEFER)
230		return -EPROBE_DEFER;
231
232	machine->gpio_mic_present = of_get_named_gpio(np,
233			"nvidia,mic-present-gpios", 0);
234	if (machine->gpio_mic_present == -EPROBE_DEFER)
235		return -EPROBE_DEFER;
236
237	machine->gpio_hp_en = of_get_named_gpio(np, "nvidia,hp-en-gpios", 0);
238	if (machine->gpio_hp_en == -EPROBE_DEFER)
239		return -EPROBE_DEFER;
240	if (gpio_is_valid(machine->gpio_hp_en)) {
241		ret = devm_gpio_request_one(&pdev->dev, machine->gpio_hp_en,
242				GPIOF_OUT_INIT_LOW, "hp_en");
243		if (ret) {
244			dev_err(card->dev, "cannot get hp_en gpio\n");
245			return ret;
246		}
247	}
248
249	machine->gpio_dmic_clk_en = of_get_named_gpio(np,
250		"nvidia,dmic-clk-en-gpios", 0);
251	if (machine->gpio_dmic_clk_en == -EPROBE_DEFER)
252		return -EPROBE_DEFER;
253	if (gpio_is_valid(machine->gpio_dmic_clk_en)) {
254		ret = devm_gpio_request_one(&pdev->dev,
255				machine->gpio_dmic_clk_en,
256				GPIOF_OUT_INIT_HIGH, "dmic_clk_en");
257		if (ret) {
258			dev_err(card->dev, "cannot get dmic_clk_en gpio\n");
259			return ret;
260		}
261	}
262
263	ret = snd_soc_of_parse_card_name(card, "nvidia,model");
264	if (ret)
265		goto err;
266
267	ret = snd_soc_of_parse_audio_routing(card, "nvidia,audio-routing");
268	if (ret)
269		goto err;
270
271	tegra_rt5677_dai.codec_of_node = of_parse_phandle(np,
272			"nvidia,audio-codec", 0);
273	if (!tegra_rt5677_dai.codec_of_node) {
274		dev_err(&pdev->dev,
275			"Property 'nvidia,audio-codec' missing or invalid\n");
276		ret = -EINVAL;
277		goto err;
278	}
279
280	tegra_rt5677_dai.cpu_of_node = of_parse_phandle(np,
281			"nvidia,i2s-controller", 0);
282	if (!tegra_rt5677_dai.cpu_of_node) {
283		dev_err(&pdev->dev,
284			"Property 'nvidia,i2s-controller' missing or invalid\n");
285		ret = -EINVAL;
286		goto err;
287	}
288	tegra_rt5677_dai.platform_of_node = tegra_rt5677_dai.cpu_of_node;
289
290	ret = tegra_asoc_utils_init(&machine->util_data, &pdev->dev);
291	if (ret)
292		goto err;
293
294	ret = snd_soc_register_card(card);
295	if (ret) {
296		dev_err(&pdev->dev, "snd_soc_register_card failed (%d)\n",
297			ret);
298		goto err_fini_utils;
299	}
300
301	return 0;
302
303err_fini_utils:
304	tegra_asoc_utils_fini(&machine->util_data);
305err:
306	return ret;
307}
308
309static int tegra_rt5677_remove(struct platform_device *pdev)
310{
311	struct snd_soc_card *card = platform_get_drvdata(pdev);
312	struct tegra_rt5677 *machine = snd_soc_card_get_drvdata(card);
313
314	snd_soc_unregister_card(card);
315
316	tegra_asoc_utils_fini(&machine->util_data);
317
318	return 0;
319}
320
321static const struct of_device_id tegra_rt5677_of_match[] = {
322	{ .compatible = "nvidia,tegra-audio-rt5677", },
323	{},
324};
325
326static struct platform_driver tegra_rt5677_driver = {
327	.driver = {
328		.name = DRV_NAME,
329		.pm = &snd_soc_pm_ops,
330		.of_match_table = tegra_rt5677_of_match,
331	},
332	.probe = tegra_rt5677_probe,
333	.remove = tegra_rt5677_remove,
334};
335module_platform_driver(tegra_rt5677_driver);
336
337MODULE_AUTHOR("Anatol Pomozov <anatol@google.com>");
338MODULE_DESCRIPTION("Tegra+RT5677 machine ASoC driver");
339MODULE_LICENSE("GPL v2");
340MODULE_ALIAS("platform:" DRV_NAME);
341MODULE_DEVICE_TABLE(of, tegra_rt5677_of_match);
342