1/*
2 * tegra_wm8753.c - Tegra machine ASoC driver for boards using WM8753 codec.
3 *
4 * Author: Stephen Warren <swarren@nvidia.com>
5 * Copyright (C) 2010-2012 - NVIDIA, Inc.
6 *
7 * Based on code copyright/by:
8 *
9 * (c) 2009, 2010 Nvidia Graphics Pvt. Ltd.
10 *
11 * Copyright 2007 Wolfson Microelectronics PLC.
12 * Author: Graeme Gregory
13 *         graeme.gregory@wolfsonmicro.com or linux@wolfsonmicro.com
14 *
15 * This program is free software; you can redistribute it and/or
16 * modify it under the terms of the GNU General Public License
17 * version 2 as published by the Free Software Foundation.
18 *
19 * This program is distributed in the hope that it will be useful, but
20 * WITHOUT ANY WARRANTY; without even the implied warranty of
21 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
22 * General Public License for more details.
23 *
24 * You should have received a copy of the GNU General Public License
25 * along with this program; if not, write to the Free Software
26 * Foundation, Inc., 51 Franklin St, Fifth Floor, Boston, MA
27 * 02110-1301 USA
28 *
29 */
30
31#include <linux/module.h>
32#include <linux/platform_device.h>
33#include <linux/slab.h>
34#include <linux/gpio.h>
35#include <linux/of_gpio.h>
36
37#include <sound/core.h>
38#include <sound/jack.h>
39#include <sound/pcm.h>
40#include <sound/pcm_params.h>
41#include <sound/soc.h>
42
43#include "../codecs/wm8753.h"
44
45#include "tegra_asoc_utils.h"
46
47#define DRV_NAME "tegra-snd-wm8753"
48
49struct tegra_wm8753 {
50	struct tegra_asoc_utils_data util_data;
51};
52
53static int tegra_wm8753_hw_params(struct snd_pcm_substream *substream,
54					struct snd_pcm_hw_params *params)
55{
56	struct snd_soc_pcm_runtime *rtd = substream->private_data;
57	struct snd_soc_dai *codec_dai = rtd->codec_dai;
58	struct snd_soc_card *card = rtd->card;
59	struct tegra_wm8753 *machine = snd_soc_card_get_drvdata(card);
60	int srate, mclk;
61	int err;
62
63	srate = params_rate(params);
64	switch (srate) {
65	case 11025:
66	case 22050:
67	case 44100:
68	case 88200:
69		mclk = 11289600;
70		break;
71	default:
72		mclk = 12288000;
73		break;
74	}
75
76	err = tegra_asoc_utils_set_rate(&machine->util_data, srate, mclk);
77	if (err < 0) {
78		dev_err(card->dev, "Can't configure clocks\n");
79		return err;
80	}
81
82	err = snd_soc_dai_set_sysclk(codec_dai, WM8753_MCLK, mclk,
83					SND_SOC_CLOCK_IN);
84	if (err < 0) {
85		dev_err(card->dev, "codec_dai clock not set\n");
86		return err;
87	}
88
89	return 0;
90}
91
92static struct snd_soc_ops tegra_wm8753_ops = {
93	.hw_params = tegra_wm8753_hw_params,
94};
95
96static const struct snd_soc_dapm_widget tegra_wm8753_dapm_widgets[] = {
97	SND_SOC_DAPM_HP("Headphone Jack", NULL),
98	SND_SOC_DAPM_MIC("Mic Jack", NULL),
99};
100
101static struct snd_soc_dai_link tegra_wm8753_dai = {
102	.name = "WM8753",
103	.stream_name = "WM8753 PCM",
104	.codec_dai_name = "wm8753-hifi",
105	.ops = &tegra_wm8753_ops,
106	.dai_fmt = SND_SOC_DAIFMT_I2S |
107			SND_SOC_DAIFMT_NB_NF |
108			SND_SOC_DAIFMT_CBS_CFS,
109};
110
111static struct snd_soc_card snd_soc_tegra_wm8753 = {
112	.name = "tegra-wm8753",
113	.owner = THIS_MODULE,
114	.dai_link = &tegra_wm8753_dai,
115	.num_links = 1,
116
117	.dapm_widgets = tegra_wm8753_dapm_widgets,
118	.num_dapm_widgets = ARRAY_SIZE(tegra_wm8753_dapm_widgets),
119	.fully_routed = true,
120};
121
122static int tegra_wm8753_driver_probe(struct platform_device *pdev)
123{
124	struct device_node *np = pdev->dev.of_node;
125	struct snd_soc_card *card = &snd_soc_tegra_wm8753;
126	struct tegra_wm8753 *machine;
127	int ret;
128
129	machine = devm_kzalloc(&pdev->dev, sizeof(struct tegra_wm8753),
130			       GFP_KERNEL);
131	if (!machine) {
132		dev_err(&pdev->dev, "Can't allocate tegra_wm8753 struct\n");
133		return -ENOMEM;
134	}
135
136	card->dev = &pdev->dev;
137	platform_set_drvdata(pdev, card);
138	snd_soc_card_set_drvdata(card, machine);
139
140	ret = snd_soc_of_parse_card_name(card, "nvidia,model");
141	if (ret)
142		goto err;
143
144	ret = snd_soc_of_parse_audio_routing(card, "nvidia,audio-routing");
145	if (ret)
146		goto err;
147
148	tegra_wm8753_dai.codec_of_node = of_parse_phandle(np,
149			"nvidia,audio-codec", 0);
150	if (!tegra_wm8753_dai.codec_of_node) {
151		dev_err(&pdev->dev,
152			"Property 'nvidia,audio-codec' missing or invalid\n");
153		ret = -EINVAL;
154		goto err;
155	}
156
157	tegra_wm8753_dai.cpu_of_node = of_parse_phandle(np,
158			"nvidia,i2s-controller", 0);
159	if (!tegra_wm8753_dai.cpu_of_node) {
160		dev_err(&pdev->dev,
161			"Property 'nvidia,i2s-controller' missing or invalid\n");
162		ret = -EINVAL;
163		goto err;
164	}
165
166	tegra_wm8753_dai.platform_of_node = tegra_wm8753_dai.cpu_of_node;
167
168	ret = tegra_asoc_utils_init(&machine->util_data, &pdev->dev);
169	if (ret)
170		goto err;
171
172	ret = snd_soc_register_card(card);
173	if (ret) {
174		dev_err(&pdev->dev, "snd_soc_register_card failed (%d)\n",
175			ret);
176		goto err_fini_utils;
177	}
178
179	return 0;
180
181err_fini_utils:
182	tegra_asoc_utils_fini(&machine->util_data);
183err:
184	return ret;
185}
186
187static int tegra_wm8753_driver_remove(struct platform_device *pdev)
188{
189	struct snd_soc_card *card = platform_get_drvdata(pdev);
190	struct tegra_wm8753 *machine = snd_soc_card_get_drvdata(card);
191
192	snd_soc_unregister_card(card);
193
194	tegra_asoc_utils_fini(&machine->util_data);
195
196	return 0;
197}
198
199static const struct of_device_id tegra_wm8753_of_match[] = {
200	{ .compatible = "nvidia,tegra-audio-wm8753", },
201	{},
202};
203
204static struct platform_driver tegra_wm8753_driver = {
205	.driver = {
206		.name = DRV_NAME,
207		.pm = &snd_soc_pm_ops,
208		.of_match_table = tegra_wm8753_of_match,
209	},
210	.probe = tegra_wm8753_driver_probe,
211	.remove = tegra_wm8753_driver_remove,
212};
213module_platform_driver(tegra_wm8753_driver);
214
215MODULE_AUTHOR("Stephen Warren <swarren@nvidia.com>");
216MODULE_DESCRIPTION("Tegra+WM8753 machine ASoC driver");
217MODULE_LICENSE("GPL");
218MODULE_ALIAS("platform:" DRV_NAME);
219MODULE_DEVICE_TABLE(of, tegra_wm8753_of_match);
220