summaryrefslogtreecommitdiffstats
path: root/sound/soc/qcom/apq8016_sbc.c
blob: 1289543c8fb2594dfa4a9d6f9be16f70d0e67c5c (plain)
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
75
76
77
78
79
80
81
82
83
84
85
86
87
88
89
90
91
92
93
94
95
96
97
98
99
100
101
102
103
104
105
106
107
108
109
110
111
112
113
114
115
116
117
118
119
120
121
122
123
124
125
126
127
128
129
130
131
132
133
134
135
136
137
138
139
140
141
142
143
144
145
146
147
148
149
150
151
152
153
154
155
156
157
158
159
160
161
162
163
164
165
166
167
168
169
170
171
172
173
174
175
176
177
178
179
180
181
182
183
184
185
186
187
188
189
190
191
192
193
194
195
196
197
198
199
200
201
202
/*
 * Copyright (c) 2015 The Linux Foundation. All rights reserved.
 *
 * This program is free software; you can redistribute it and/or modify
 * it under the terms of the GNU General Public License version 2 and
 * only version 2 as published by the Free Software Foundation.
 *
 * This program is distributed in the hope that it will be useful,
 * but WITHOUT ANY WARRANTY; without even the implied warranty of
 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
 * GNU General Public License for more details.
 *
 */

#include <linux/device.h>
#include <linux/module.h>
#include <linux/kernel.h>
#include <linux/io.h>
#include <linux/of.h>
#include <linux/clk.h>
#include <linux/platform_device.h>
#include <sound/pcm.h>
#include <sound/pcm_params.h>
#include <sound/soc.h>
#include <dt-bindings/sound/apq8016-lpass.h>

struct apq8016_sbc_data {
	void __iomem *mic_iomux;
	void __iomem *spkr_iomux;
	struct snd_soc_dai_link dai_link[];	/* dynamically allocated */
};

#define MIC_CTRL_TER_WS_SLAVE_SEL	BIT(21)
#define MIC_CTRL_QUA_WS_SLAVE_SEL_10	BIT(17)
#define MIC_CTRL_TLMM_SCLK_EN		BIT(1)
#define	SPKR_CTL_PRI_WS_SLAVE_SEL_11	(BIT(17) | BIT(16))

static int apq8016_sbc_dai_init(struct snd_soc_pcm_runtime *rtd)
{
	struct snd_soc_dai *cpu_dai = rtd->cpu_dai;
	struct snd_soc_card *card = rtd->card;
	struct apq8016_sbc_data *pdata = snd_soc_card_get_drvdata(card);
	int rval = 0;

	switch (cpu_dai->id) {
	case MI2S_PRIMARY:
		writel(readl(pdata->spkr_iomux) | SPKR_CTL_PRI_WS_SLAVE_SEL_11,
			pdata->spkr_iomux);
		break;

	case MI2S_QUATERNARY:
		/* Configure the Quat MI2S to TLMM */
		writel(readl(pdata->mic_iomux) | MIC_CTRL_QUA_WS_SLAVE_SEL_10 |
			MIC_CTRL_TLMM_SCLK_EN,
			pdata->mic_iomux);
		break;
	case MI2S_TERTIARY:
		writel(readl(pdata->mic_iomux) | MIC_CTRL_TER_WS_SLAVE_SEL |
			MIC_CTRL_TLMM_SCLK_EN,
			pdata->mic_iomux);

		break;

	default:
		dev_err(card->dev, "unsupported cpu dai configuration\n");
		rval = -EINVAL;
		break;

	}

	return rval;
}

static struct apq8016_sbc_data *apq8016_sbc_parse_of(struct snd_soc_card *card)
{
	struct device *dev = card->dev;
	struct snd_soc_dai_link *link;
	struct device_node *np, *codec, *cpu, *node  = dev->of_node;
	struct apq8016_sbc_data *data;
	int ret, num_links;

	ret = snd_soc_of_parse_card_name(card, "qcom,model");
	if (ret) {
		dev_err(dev, "Error parsing card name: %d\n", ret);
		return ERR_PTR(ret);
	}

	/* Populate links */
	num_links = of_get_child_count(node);

	/* Allocate the private data and the DAI link array */
	data = devm_kzalloc(dev, sizeof(*data) + sizeof(*link) * num_links,
			    GFP_KERNEL);
	if (!data)
		return ERR_PTR(-ENOMEM);

	card->dai_link	= &data->dai_link[0];
	card->num_links	= num_links;

	link = data->dai_link;

	for_each_child_of_node(node, np) {
		cpu = of_get_child_by_name(np, "cpu");
		codec = of_get_child_by_name(np, "codec");

		if (!cpu || !codec) {
			dev_err(dev, "Can't find cpu/codec DT node\n");
			return ERR_PTR(-EINVAL);
		}

		link->cpu_of_node = of_parse_phandle(cpu, "sound-dai", 0);
		if (!link->cpu_of_node) {
			dev_err(card->dev, "error getting cpu phandle\n");
			return ERR_PTR(-EINVAL);
		}

		link->codec_of_node = of_parse_phandle(codec, "sound-dai", 0);
		if (!link->codec_of_node) {
			dev_err(card->dev, "error getting codec phandle\n");
			return ERR_PTR(-EINVAL);
		}

		ret = snd_soc_of_get_dai_name(cpu, &link->cpu_dai_name);
		if (ret) {
			dev_err(card->dev, "error getting cpu dai name\n");
			return ERR_PTR(ret);
		}

		ret = snd_soc_of_get_dai_name(codec, &link->codec_dai_name);
		if (ret) {
			dev_err(card->dev, "error getting codec dai name\n");
			return ERR_PTR(ret);
		}

		link->platform_of_node = link->cpu_of_node;
		ret = of_property_read_string(np, "link-name", &link->name);
		if (ret) {
			dev_err(card->dev, "error getting codec dai_link name\n");
			return ERR_PTR(ret);
		}

		link->stream_name = link->name;
		link->init = apq8016_sbc_dai_init;
		link++;
	}

	return data;
}

static int apq8016_sbc_platform_probe(struct platform_device *pdev)
{
	struct device *dev = &pdev->dev;
	struct snd_soc_card *card;
	struct apq8016_sbc_data *data;
	struct resource *res;

	card = devm_kzalloc(dev, sizeof(*card), GFP_KERNEL);
	if (!card)
		return -ENOMEM;

	card->dev = dev;
	data = apq8016_sbc_parse_of(card);
	if (IS_ERR(data)) {
		dev_err(&pdev->dev, "Error resolving dai links: %ld\n",
			PTR_ERR(data));
		return PTR_ERR(data);
	}

	res = platform_get_resource_byname(pdev, IORESOURCE_MEM, "mic-iomux");
	data->mic_iomux = devm_ioremap_resource(dev, res);
	if (IS_ERR(data->mic_iomux))
		return PTR_ERR(data->mic_iomux);

	res = platform_get_resource_byname(pdev, IORESOURCE_MEM, "spkr-iomux");
	data->spkr_iomux = devm_ioremap_resource(dev, res);
	if (IS_ERR(data->spkr_iomux))
		return PTR_ERR(data->spkr_iomux);

	platform_set_drvdata(pdev, data);
	snd_soc_card_set_drvdata(card, data);

	return devm_snd_soc_register_card(&pdev->dev, card);
}

static const struct of_device_id apq8016_sbc_device_id[]  = {
	{ .compatible = "qcom,apq8016-sbc-sndcard" },
	{},
};
MODULE_DEVICE_TABLE(of, apq8016_sbc_device_id);

static struct platform_driver apq8016_sbc_platform_driver = {
	.driver = {
		.name = "qcom-apq8016-sbc",
		.of_match_table = of_match_ptr(apq8016_sbc_device_id),
	},
	.probe = apq8016_sbc_platform_probe,
};
module_platform_driver(apq8016_sbc_platform_driver);

MODULE_AUTHOR("Srinivas Kandagatla <srinivas.kandagatla@linaro.org");
MODULE_DESCRIPTION("APQ8016 ASoC Machine Driver");
MODULE_LICENSE("GPL v2");
OpenPOWER on IntegriCloud