1/*
  2* tegra_rt5640.c - Tegra machine ASoC driver for boards using WM8903 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
 44struct 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
 50static 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
 79static struct snd_soc_ops tegra_rt5640_ops = {
 80	.hw_params = tegra_rt5640_asoc_hw_params,
 81};
 82
 83static struct snd_soc_jack tegra_rt5640_hp_jack;
 84
 85static struct snd_soc_jack_pin tegra_rt5640_hp_jack_pins[] = {
 86	{
 87		.pin = "Headphones",
 88		.mask = SND_JACK_HEADPHONE,
 89	},
 90};
 91
 92static 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
 99static 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
105static const struct snd_kcontrol_new tegra_rt5640_controls[] = {
106	SOC_DAPM_PIN_SWITCH("Speakers"),
107};
108
109static 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
129static int tegra_rt5640_card_remove(struct snd_soc_card *card)
130{
131	struct tegra_rt5640 *machine = snd_soc_card_get_drvdata(card);
132
133	if (gpio_is_valid(machine->gpio_hp_det)) {
134		snd_soc_jack_free_gpios(&tegra_rt5640_hp_jack, 1,
135					&tegra_rt5640_hp_jack_gpio);
136	}
137
138	return 0;
139}
140
141static struct snd_soc_dai_link tegra_rt5640_dai = {
142	.name = "RT5640",
143	.stream_name = "RT5640 PCM",
144	.codec_dai_name = "rt5640-aif1",
145	.init = tegra_rt5640_asoc_init,
146	.ops = &tegra_rt5640_ops,
147	.dai_fmt = SND_SOC_DAIFMT_I2S | SND_SOC_DAIFMT_NB_NF |
148			SND_SOC_DAIFMT_CBS_CFS,
149};
150
151static struct snd_soc_card snd_soc_tegra_rt5640 = {
152	.name = "tegra-rt5640",
153	.owner = THIS_MODULE,
154	.remove = tegra_rt5640_card_remove,
155	.dai_link = &tegra_rt5640_dai,
156	.num_links = 1,
157	.controls = tegra_rt5640_controls,
158	.num_controls = ARRAY_SIZE(tegra_rt5640_controls),
159	.dapm_widgets = tegra_rt5640_dapm_widgets,
160	.num_dapm_widgets = ARRAY_SIZE(tegra_rt5640_dapm_widgets),
161	.fully_routed = true,
162};
163
164static int tegra_rt5640_probe(struct platform_device *pdev)
165{
166	struct device_node *np = pdev->dev.of_node;
167	struct snd_soc_card *card = &snd_soc_tegra_rt5640;
168	struct tegra_rt5640 *machine;
169	int ret;
170
171	machine = devm_kzalloc(&pdev->dev,
172			sizeof(struct tegra_rt5640), GFP_KERNEL);
173	if (!machine) {
174		dev_err(&pdev->dev, "Can't allocate tegra_rt5640\n");
175		return -ENOMEM;
176	}
177
178	card->dev = &pdev->dev;
179	platform_set_drvdata(pdev, card);
180	snd_soc_card_set_drvdata(card, machine);
181
182	machine->gpio_hp_det = of_get_named_gpio_flags(
183		np, "nvidia,hp-det-gpios", 0, &machine->gpio_hp_det_flags);
184	if (machine->gpio_hp_det == -EPROBE_DEFER)
185		return -EPROBE_DEFER;
186
187	ret = snd_soc_of_parse_card_name(card, "nvidia,model");
188	if (ret)
189		goto err;
190
191	ret = snd_soc_of_parse_audio_routing(card, "nvidia,audio-routing");
192	if (ret)
193		goto err;
194
195	tegra_rt5640_dai.codec_of_node = of_parse_phandle(np,
196			"nvidia,audio-codec", 0);
197	if (!tegra_rt5640_dai.codec_of_node) {
198		dev_err(&pdev->dev,
199			"Property 'nvidia,audio-codec' missing or invalid\n");
200		ret = -EINVAL;
201		goto err;
202	}
203
204	tegra_rt5640_dai.cpu_of_node = of_parse_phandle(np,
205			"nvidia,i2s-controller", 0);
206	if (!tegra_rt5640_dai.cpu_of_node) {
207		dev_err(&pdev->dev,
208			"Property 'nvidia,i2s-controller' missing or invalid\n");
209		ret = -EINVAL;
210		goto err;
211	}
212
213	tegra_rt5640_dai.platform_of_node = tegra_rt5640_dai.cpu_of_node;
214
215	ret = tegra_asoc_utils_init(&machine->util_data, &pdev->dev);
216	if (ret)
217		goto err;
218
219	ret = snd_soc_register_card(card);
220	if (ret) {
221		dev_err(&pdev->dev, "snd_soc_register_card failed (%d)\n",
222			ret);
223		goto err_fini_utils;
224	}
225
226	return 0;
227
228err_fini_utils:
229	tegra_asoc_utils_fini(&machine->util_data);
230err:
231	return ret;
232}
233
234static int tegra_rt5640_remove(struct platform_device *pdev)
235{
236	struct snd_soc_card *card = platform_get_drvdata(pdev);
237	struct tegra_rt5640 *machine = snd_soc_card_get_drvdata(card);
238
239	snd_soc_unregister_card(card);
240
241	tegra_asoc_utils_fini(&machine->util_data);
242
243	return 0;
244}
245
246static const struct of_device_id tegra_rt5640_of_match[] = {
247	{ .compatible = "nvidia,tegra-audio-rt5640", },
248	{},
249};
250
251static struct platform_driver tegra_rt5640_driver = {
252	.driver = {
253		.name = DRV_NAME,
254		.pm = &snd_soc_pm_ops,
255		.of_match_table = tegra_rt5640_of_match,
256	},
257	.probe = tegra_rt5640_probe,
258	.remove = tegra_rt5640_remove,
259};
260module_platform_driver(tegra_rt5640_driver);
261
262MODULE_AUTHOR("Stephen Warren <swarren@nvidia.com>");
263MODULE_DESCRIPTION("Tegra+RT5640 machine ASoC driver");
264MODULE_LICENSE("GPL v2");
265MODULE_ALIAS("platform:" DRV_NAME);
266MODULE_DEVICE_TABLE(of, tegra_rt5640_of_match);