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
32static 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 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	/* Set SGTL5000's SYSCLK (provided by SAIF MCLK) */
53	ret = snd_soc_dai_set_sysclk(codec_dai, SGTL5000_SYSCLK, mclk, 0);
54	if (ret) {
55		dev_err(codec_dai->dev, "Failed to set sysclk to %u.%03uMHz\n",
56			mclk / 1000000, mclk / 1000 % 1000);
57		return ret;
58	}
59
60	/* The SAIF MCLK should be the same as SGTL5000_SYSCLK */
61	ret = snd_soc_dai_set_sysclk(cpu_dai, MXS_SAIF_MCLK, mclk, 0);
62	if (ret) {
63		dev_err(cpu_dai->dev, "Failed to set sysclk to %u.%03uMHz\n",
64			mclk / 1000000, mclk / 1000 % 1000);
65		return ret;
66	}
67
68	return 0;
69}
70
71static struct snd_soc_ops mxs_sgtl5000_hifi_ops = {
72	.hw_params = mxs_sgtl5000_hw_params,
73};
74
75#define MXS_SGTL5000_DAI_FMT (SND_SOC_DAIFMT_I2S | SND_SOC_DAIFMT_NB_NF | \
76	SND_SOC_DAIFMT_CBS_CFS)
77
78static struct snd_soc_dai_link mxs_sgtl5000_dai[] = {
79	{
80		.name		= "HiFi Tx",
81		.stream_name	= "HiFi Playback",
82		.codec_dai_name	= "sgtl5000",
83		.dai_fmt	= MXS_SGTL5000_DAI_FMT,
84		.ops		= &mxs_sgtl5000_hifi_ops,
85		.playback_only	= true,
86	}, {
87		.name		= "HiFi Rx",
88		.stream_name	= "HiFi Capture",
89		.codec_dai_name	= "sgtl5000",
90		.dai_fmt	= MXS_SGTL5000_DAI_FMT,
91		.ops		= &mxs_sgtl5000_hifi_ops,
92		.capture_only	= true,
93	},
94};
95
96static struct snd_soc_card mxs_sgtl5000 = {
97	.name		= "mxs_sgtl5000",
98	.owner		= THIS_MODULE,
99	.dai_link	= mxs_sgtl5000_dai,
100	.num_links	= ARRAY_SIZE(mxs_sgtl5000_dai),
101};
102
103static int mxs_sgtl5000_probe(struct platform_device *pdev)
104{
105	struct snd_soc_card *card = &mxs_sgtl5000;
106	int ret, i;
107	struct device_node *np = pdev->dev.of_node;
108	struct device_node *saif_np[2], *codec_np;
109
110	saif_np[0] = of_parse_phandle(np, "saif-controllers", 0);
111	saif_np[1] = of_parse_phandle(np, "saif-controllers", 1);
112	codec_np = of_parse_phandle(np, "audio-codec", 0);
113	if (!saif_np[0] || !saif_np[1] || !codec_np) {
114		dev_err(&pdev->dev, "phandle missing or invalid\n");
115		return -EINVAL;
116	}
117
118	for (i = 0; i < 2; i++) {
119		mxs_sgtl5000_dai[i].codec_name = NULL;
120		mxs_sgtl5000_dai[i].codec_of_node = codec_np;
121		mxs_sgtl5000_dai[i].cpu_dai_name = NULL;
122		mxs_sgtl5000_dai[i].cpu_of_node = saif_np[i];
123		mxs_sgtl5000_dai[i].platform_name = NULL;
124		mxs_sgtl5000_dai[i].platform_of_node = saif_np[i];
125	}
126
127	of_node_put(codec_np);
128	of_node_put(saif_np[0]);
129	of_node_put(saif_np[1]);
130
131	/*
132	 * Set an init clock(11.28Mhz) for sgtl5000 initialization(i2c r/w).
133	 * The Sgtl5000 sysclk is derived from saif0 mclk and it's range
134	 * should be >= 8MHz and <= 27M.
135	 */
136	ret = mxs_saif_get_mclk(0, 44100 * 256, 44100);
137	if (ret) {
138		dev_err(&pdev->dev, "failed to get mclk\n");
139		return ret;
140	}
141
142	card->dev = &pdev->dev;
143	platform_set_drvdata(pdev, card);
144
145	ret = snd_soc_register_card(card);
146	if (ret) {
147		dev_err(&pdev->dev, "snd_soc_register_card failed (%d)\n",
148			ret);
149		return ret;
150	}
151
152	return 0;
153}
154
155static int mxs_sgtl5000_remove(struct platform_device *pdev)
156{
157	struct snd_soc_card *card = platform_get_drvdata(pdev);
158
159	mxs_saif_put_mclk(0);
160
161	snd_soc_unregister_card(card);
162
163	return 0;
164}
165
166static const struct of_device_id mxs_sgtl5000_dt_ids[] = {
167	{ .compatible = "fsl,mxs-audio-sgtl5000", },
168	{ /* sentinel */ }
169};
170MODULE_DEVICE_TABLE(of, mxs_sgtl5000_dt_ids);
171
172static struct platform_driver mxs_sgtl5000_audio_driver = {
173	.driver = {
174		.name = "mxs-sgtl5000",
175		.of_match_table = mxs_sgtl5000_dt_ids,
176	},
177	.probe = mxs_sgtl5000_probe,
178	.remove = mxs_sgtl5000_remove,
179};
180
181module_platform_driver(mxs_sgtl5000_audio_driver);
182
183MODULE_AUTHOR("Freescale Semiconductor, Inc.");
184MODULE_DESCRIPTION("MXS ALSA SoC Machine driver");
185MODULE_LICENSE("GPL");
186MODULE_ALIAS("platform:mxs-sgtl5000");
187