xref: /openbmc/linux/sound/soc/mxs/mxs-sgtl5000.c (revision 31b90347)
1 /*
2  * Copyright 2011 Freescale Semiconductor, Inc.
3  *
4  * This program is free software; you can redistribute it and/or modify
5  * it under the terms of the GNU General Public License as published by
6  * the Free Software Foundation; either version 2 of the License, or
7  * (at your option) any later version.
8  *
9  * This program is distributed in the hope that it will be useful,
10  * but WITHOUT ANY WARRANTY; without even the implied warranty of
11  * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
12  * GNU General Public License for more details.
13  *
14  * You should have received a copy of the GNU General Public License along
15  * with this program; if not, write to the Free Software Foundation, Inc.,
16  * 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA.
17  */
18 
19 #include <linux/module.h>
20 #include <linux/device.h>
21 #include <linux/of.h>
22 #include <linux/of_device.h>
23 #include <sound/core.h>
24 #include <sound/pcm.h>
25 #include <sound/soc.h>
26 #include <sound/jack.h>
27 #include <sound/soc-dapm.h>
28 
29 #include "../codecs/sgtl5000.h"
30 #include "mxs-saif.h"
31 
32 static int mxs_sgtl5000_hw_params(struct snd_pcm_substream *substream,
33 	struct snd_pcm_hw_params *params)
34 {
35 	struct snd_soc_pcm_runtime *rtd = substream->private_data;
36 	struct snd_soc_dai *codec_dai = rtd->codec_dai;
37 	struct snd_soc_dai *cpu_dai = rtd->cpu_dai;
38 	unsigned int rate = params_rate(params);
39 	u32 dai_format, mclk;
40 	int ret;
41 
42 	/* sgtl5000 does not support 512*rate when in 96000 fs */
43 	switch (rate) {
44 	case 96000:
45 		mclk = 256 * rate;
46 		break;
47 	default:
48 		mclk = 512 * rate;
49 		break;
50 	}
51 
52 	/* Sgtl5000 sysclk should be >= 8MHz and <= 27M */
53 	if (mclk < 8000000 || mclk > 27000000) {
54 		dev_err(codec_dai->dev, "Invalid mclk frequency: %u.%03uMHz\n",
55 			mclk / 1000000, mclk / 1000 % 1000);
56 		return -EINVAL;
57 	}
58 
59 	/* Set SGTL5000's SYSCLK (provided by SAIF MCLK) */
60 	ret = snd_soc_dai_set_sysclk(codec_dai, SGTL5000_SYSCLK, mclk, 0);
61 	if (ret) {
62 		dev_err(codec_dai->dev, "Failed to set sysclk to %u.%03uMHz\n",
63 			mclk / 1000000, mclk / 1000 % 1000);
64 		return ret;
65 	}
66 
67 	/* The SAIF MCLK should be the same as SGTL5000_SYSCLK */
68 	ret = snd_soc_dai_set_sysclk(cpu_dai, MXS_SAIF_MCLK, mclk, 0);
69 	if (ret) {
70 		dev_err(cpu_dai->dev, "Failed to set sysclk to %u.%03uMHz\n",
71 			mclk / 1000000, mclk / 1000 % 1000);
72 		return ret;
73 	}
74 
75 	/* set codec to slave mode */
76 	dai_format = SND_SOC_DAIFMT_I2S | SND_SOC_DAIFMT_NB_NF |
77 			SND_SOC_DAIFMT_CBS_CFS;
78 
79 	/* set codec DAI configuration */
80 	ret = snd_soc_dai_set_fmt(codec_dai, dai_format);
81 	if (ret) {
82 		dev_err(codec_dai->dev, "Failed to set dai format to %08x\n",
83 			dai_format);
84 		return ret;
85 	}
86 
87 	/* set cpu DAI configuration */
88 	ret = snd_soc_dai_set_fmt(cpu_dai, dai_format);
89 	if (ret) {
90 		dev_err(cpu_dai->dev, "Failed to set dai format to %08x\n",
91 			dai_format);
92 		return ret;
93 	}
94 
95 	return 0;
96 }
97 
98 static struct snd_soc_ops mxs_sgtl5000_hifi_ops = {
99 	.hw_params = mxs_sgtl5000_hw_params,
100 };
101 
102 static struct snd_soc_dai_link mxs_sgtl5000_dai[] = {
103 	{
104 		.name		= "HiFi Tx",
105 		.stream_name	= "HiFi Playback",
106 		.codec_dai_name	= "sgtl5000",
107 		.ops		= &mxs_sgtl5000_hifi_ops,
108 		.playback_only	= true,
109 	}, {
110 		.name		= "HiFi Rx",
111 		.stream_name	= "HiFi Capture",
112 		.codec_dai_name	= "sgtl5000",
113 		.ops		= &mxs_sgtl5000_hifi_ops,
114 		.capture_only	= true,
115 	},
116 };
117 
118 static struct snd_soc_card mxs_sgtl5000 = {
119 	.name		= "mxs_sgtl5000",
120 	.owner		= THIS_MODULE,
121 	.dai_link	= mxs_sgtl5000_dai,
122 	.num_links	= ARRAY_SIZE(mxs_sgtl5000_dai),
123 };
124 
125 static int mxs_sgtl5000_probe(struct platform_device *pdev)
126 {
127 	struct snd_soc_card *card = &mxs_sgtl5000;
128 	int ret, i;
129 	struct device_node *np = pdev->dev.of_node;
130 	struct device_node *saif_np[2], *codec_np;
131 
132 	saif_np[0] = of_parse_phandle(np, "saif-controllers", 0);
133 	saif_np[1] = of_parse_phandle(np, "saif-controllers", 1);
134 	codec_np = of_parse_phandle(np, "audio-codec", 0);
135 	if (!saif_np[0] || !saif_np[1] || !codec_np) {
136 		dev_err(&pdev->dev, "phandle missing or invalid\n");
137 		return -EINVAL;
138 	}
139 
140 	for (i = 0; i < 2; i++) {
141 		mxs_sgtl5000_dai[i].codec_name = NULL;
142 		mxs_sgtl5000_dai[i].codec_of_node = codec_np;
143 		mxs_sgtl5000_dai[i].cpu_dai_name = NULL;
144 		mxs_sgtl5000_dai[i].cpu_of_node = saif_np[i];
145 		mxs_sgtl5000_dai[i].platform_name = NULL;
146 		mxs_sgtl5000_dai[i].platform_of_node = saif_np[i];
147 	}
148 
149 	of_node_put(codec_np);
150 	of_node_put(saif_np[0]);
151 	of_node_put(saif_np[1]);
152 
153 	/*
154 	 * Set an init clock(11.28Mhz) for sgtl5000 initialization(i2c r/w).
155 	 * The Sgtl5000 sysclk is derived from saif0 mclk and it's range
156 	 * should be >= 8MHz and <= 27M.
157 	 */
158 	ret = mxs_saif_get_mclk(0, 44100 * 256, 44100);
159 	if (ret) {
160 		dev_err(&pdev->dev, "failed to get mclk\n");
161 		return ret;
162 	}
163 
164 	card->dev = &pdev->dev;
165 	platform_set_drvdata(pdev, card);
166 
167 	ret = snd_soc_register_card(card);
168 	if (ret) {
169 		dev_err(&pdev->dev, "snd_soc_register_card failed (%d)\n",
170 			ret);
171 		return ret;
172 	}
173 
174 	return 0;
175 }
176 
177 static int mxs_sgtl5000_remove(struct platform_device *pdev)
178 {
179 	struct snd_soc_card *card = platform_get_drvdata(pdev);
180 
181 	mxs_saif_put_mclk(0);
182 
183 	snd_soc_unregister_card(card);
184 
185 	return 0;
186 }
187 
188 static const struct of_device_id mxs_sgtl5000_dt_ids[] = {
189 	{ .compatible = "fsl,mxs-audio-sgtl5000", },
190 	{ /* sentinel */ }
191 };
192 MODULE_DEVICE_TABLE(of, mxs_sgtl5000_dt_ids);
193 
194 static struct platform_driver mxs_sgtl5000_audio_driver = {
195 	.driver = {
196 		.name = "mxs-sgtl5000",
197 		.owner = THIS_MODULE,
198 		.of_match_table = mxs_sgtl5000_dt_ids,
199 	},
200 	.probe = mxs_sgtl5000_probe,
201 	.remove = mxs_sgtl5000_remove,
202 };
203 
204 module_platform_driver(mxs_sgtl5000_audio_driver);
205 
206 MODULE_AUTHOR("Freescale Semiconductor, Inc.");
207 MODULE_DESCRIPTION("MXS ALSA SoC Machine driver");
208 MODULE_LICENSE("GPL");
209 MODULE_ALIAS("platform:mxs-sgtl5000");
210