1/*
2 * Tegra machine ASoC driver for boards using a MAX90809 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 "tegra_asoc_utils.h"
39
40#define DRV_NAME "tegra-snd-max98090"
41
42struct tegra_max98090 {
43	struct tegra_asoc_utils_data util_data;
44	int gpio_hp_det;
45	int gpio_mic_det;
46};
47
48static int tegra_max98090_asoc_hw_params(struct snd_pcm_substream *substream,
49					struct snd_pcm_hw_params *params)
50{
51	struct snd_soc_pcm_runtime *rtd = substream->private_data;
52	struct snd_soc_dai *codec_dai = rtd->codec_dai;
53	struct snd_soc_card *card = rtd->card;
54	struct tegra_max98090 *machine = snd_soc_card_get_drvdata(card);
55	int srate, mclk;
56	int err;
57
58	srate = params_rate(params);
59	switch (srate) {
60	case 8000:
61	case 16000:
62	case 24000:
63	case 32000:
64	case 48000:
65	case 64000:
66	case 96000:
67		mclk = 12288000;
68		break;
69	case 11025:
70	case 22050:
71	case 44100:
72	case 88200:
73		mclk = 11289600;
74		break;
75	default:
76		mclk = 12000000;
77		break;
78	}
79
80	err = tegra_asoc_utils_set_rate(&machine->util_data, srate, mclk);
81	if (err < 0) {
82		dev_err(card->dev, "Can't configure clocks\n");
83		return err;
84	}
85
86	err = snd_soc_dai_set_sysclk(codec_dai, 0, mclk,
87					SND_SOC_CLOCK_IN);
88	if (err < 0) {
89		dev_err(card->dev, "codec_dai clock not set\n");
90		return err;
91	}
92
93	return 0;
94}
95
96static struct snd_soc_ops tegra_max98090_ops = {
97	.hw_params = tegra_max98090_asoc_hw_params,
98};
99
100static struct snd_soc_jack tegra_max98090_hp_jack;
101
102static struct snd_soc_jack_pin tegra_max98090_hp_jack_pins[] = {
103	{
104		.pin = "Headphones",
105		.mask = SND_JACK_HEADPHONE,
106	},
107};
108
109static struct snd_soc_jack_gpio tegra_max98090_hp_jack_gpio = {
110	.name = "Headphone detection",
111	.report = SND_JACK_HEADPHONE,
112	.debounce_time = 150,
113	.invert = 1,
114};
115
116static struct snd_soc_jack tegra_max98090_mic_jack;
117
118static struct snd_soc_jack_pin tegra_max98090_mic_jack_pins[] = {
119	{
120		.pin = "Mic Jack",
121		.mask = SND_JACK_MICROPHONE,
122	},
123};
124
125static struct snd_soc_jack_gpio tegra_max98090_mic_jack_gpio = {
126	.name = "Mic detection",
127	.report = SND_JACK_MICROPHONE,
128	.debounce_time = 150,
129	.invert = 1,
130};
131
132static const struct snd_soc_dapm_widget tegra_max98090_dapm_widgets[] = {
133	SND_SOC_DAPM_HP("Headphones", NULL),
134	SND_SOC_DAPM_SPK("Speakers", NULL),
135	SND_SOC_DAPM_MIC("Mic Jack", NULL),
136	SND_SOC_DAPM_MIC("Int Mic", NULL),
137};
138
139static const struct snd_kcontrol_new tegra_max98090_controls[] = {
140	SOC_DAPM_PIN_SWITCH("Headphones"),
141	SOC_DAPM_PIN_SWITCH("Speakers"),
142	SOC_DAPM_PIN_SWITCH("Mic Jack"),
143	SOC_DAPM_PIN_SWITCH("Int Mic"),
144};
145
146static int tegra_max98090_asoc_init(struct snd_soc_pcm_runtime *rtd)
147{
148	struct tegra_max98090 *machine = snd_soc_card_get_drvdata(rtd->card);
149
150	if (gpio_is_valid(machine->gpio_hp_det)) {
151		snd_soc_card_jack_new(rtd->card, "Headphones",
152				      SND_JACK_HEADPHONE,
153				      &tegra_max98090_hp_jack,
154				      tegra_max98090_hp_jack_pins,
155				      ARRAY_SIZE(tegra_max98090_hp_jack_pins));
156
157		tegra_max98090_hp_jack_gpio.gpio = machine->gpio_hp_det;
158		snd_soc_jack_add_gpios(&tegra_max98090_hp_jack,
159					1,
160					&tegra_max98090_hp_jack_gpio);
161	}
162
163	if (gpio_is_valid(machine->gpio_mic_det)) {
164		snd_soc_card_jack_new(rtd->card, "Mic Jack",
165				      SND_JACK_MICROPHONE,
166				      &tegra_max98090_mic_jack,
167				      tegra_max98090_mic_jack_pins,
168				      ARRAY_SIZE(tegra_max98090_mic_jack_pins));
169
170		tegra_max98090_mic_jack_gpio.gpio = machine->gpio_mic_det;
171		snd_soc_jack_add_gpios(&tegra_max98090_mic_jack,
172				       1,
173				       &tegra_max98090_mic_jack_gpio);
174	}
175
176	return 0;
177}
178
179static int tegra_max98090_card_remove(struct snd_soc_card *card)
180{
181	struct tegra_max98090 *machine = snd_soc_card_get_drvdata(card);
182
183	if (gpio_is_valid(machine->gpio_hp_det)) {
184		snd_soc_jack_free_gpios(&tegra_max98090_hp_jack, 1,
185					&tegra_max98090_hp_jack_gpio);
186	}
187
188	if (gpio_is_valid(machine->gpio_mic_det)) {
189		snd_soc_jack_free_gpios(&tegra_max98090_mic_jack, 1,
190					&tegra_max98090_mic_jack_gpio);
191	}
192
193	return 0;
194}
195
196static struct snd_soc_dai_link tegra_max98090_dai = {
197	.name = "max98090",
198	.stream_name = "max98090 PCM",
199	.codec_dai_name = "HiFi",
200	.init = tegra_max98090_asoc_init,
201	.ops = &tegra_max98090_ops,
202	.dai_fmt = SND_SOC_DAIFMT_I2S | SND_SOC_DAIFMT_NB_NF |
203			SND_SOC_DAIFMT_CBS_CFS,
204};
205
206static struct snd_soc_card snd_soc_tegra_max98090 = {
207	.name = "tegra-max98090",
208	.owner = THIS_MODULE,
209	.remove = tegra_max98090_card_remove,
210	.dai_link = &tegra_max98090_dai,
211	.num_links = 1,
212	.controls = tegra_max98090_controls,
213	.num_controls = ARRAY_SIZE(tegra_max98090_controls),
214	.dapm_widgets = tegra_max98090_dapm_widgets,
215	.num_dapm_widgets = ARRAY_SIZE(tegra_max98090_dapm_widgets),
216	.fully_routed = true,
217};
218
219static int tegra_max98090_probe(struct platform_device *pdev)
220{
221	struct device_node *np = pdev->dev.of_node;
222	struct snd_soc_card *card = &snd_soc_tegra_max98090;
223	struct tegra_max98090 *machine;
224	int ret;
225
226	machine = devm_kzalloc(&pdev->dev,
227			sizeof(struct tegra_max98090), GFP_KERNEL);
228	if (!machine) {
229		dev_err(&pdev->dev, "Can't allocate tegra_max98090\n");
230		return -ENOMEM;
231	}
232
233	card->dev = &pdev->dev;
234	platform_set_drvdata(pdev, card);
235	snd_soc_card_set_drvdata(card, machine);
236
237	machine->gpio_hp_det = of_get_named_gpio(np, "nvidia,hp-det-gpios", 0);
238	if (machine->gpio_hp_det == -EPROBE_DEFER)
239		return -EPROBE_DEFER;
240
241	machine->gpio_mic_det =
242			of_get_named_gpio(np, "nvidia,mic-det-gpios", 0);
243	if (machine->gpio_mic_det == -EPROBE_DEFER)
244		return -EPROBE_DEFER;
245
246	ret = snd_soc_of_parse_card_name(card, "nvidia,model");
247	if (ret)
248		goto err;
249
250	ret = snd_soc_of_parse_audio_routing(card, "nvidia,audio-routing");
251	if (ret)
252		goto err;
253
254	tegra_max98090_dai.codec_of_node = of_parse_phandle(np,
255			"nvidia,audio-codec", 0);
256	if (!tegra_max98090_dai.codec_of_node) {
257		dev_err(&pdev->dev,
258			"Property 'nvidia,audio-codec' missing or invalid\n");
259		ret = -EINVAL;
260		goto err;
261	}
262
263	tegra_max98090_dai.cpu_of_node = of_parse_phandle(np,
264			"nvidia,i2s-controller", 0);
265	if (!tegra_max98090_dai.cpu_of_node) {
266		dev_err(&pdev->dev,
267			"Property 'nvidia,i2s-controller' missing or invalid\n");
268		ret = -EINVAL;
269		goto err;
270	}
271
272	tegra_max98090_dai.platform_of_node = tegra_max98090_dai.cpu_of_node;
273
274	ret = tegra_asoc_utils_init(&machine->util_data, &pdev->dev);
275	if (ret)
276		goto err;
277
278	ret = snd_soc_register_card(card);
279	if (ret) {
280		dev_err(&pdev->dev, "snd_soc_register_card failed (%d)\n",
281			ret);
282		goto err_fini_utils;
283	}
284
285	return 0;
286
287err_fini_utils:
288	tegra_asoc_utils_fini(&machine->util_data);
289err:
290	return ret;
291}
292
293static int tegra_max98090_remove(struct platform_device *pdev)
294{
295	struct snd_soc_card *card = platform_get_drvdata(pdev);
296	struct tegra_max98090 *machine = snd_soc_card_get_drvdata(card);
297
298	snd_soc_unregister_card(card);
299
300	tegra_asoc_utils_fini(&machine->util_data);
301
302	return 0;
303}
304
305static const struct of_device_id tegra_max98090_of_match[] = {
306	{ .compatible = "nvidia,tegra-audio-max98090", },
307	{},
308};
309
310static struct platform_driver tegra_max98090_driver = {
311	.driver = {
312		.name = DRV_NAME,
313		.pm = &snd_soc_pm_ops,
314		.of_match_table = tegra_max98090_of_match,
315	},
316	.probe = tegra_max98090_probe,
317	.remove = tegra_max98090_remove,
318};
319module_platform_driver(tegra_max98090_driver);
320
321MODULE_AUTHOR("Stephen Warren <swarren@nvidia.com>");
322MODULE_DESCRIPTION("Tegra max98090 machine ASoC driver");
323MODULE_LICENSE("GPL v2");
324MODULE_ALIAS("platform:" DRV_NAME);
325MODULE_DEVICE_TABLE(of, tegra_max98090_of_match);
326