2 * Copyright 2011 Freescale Semiconductor, Inc.
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.
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.
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.
19 #include <linux/module.h>
20 #include <linux/device.h>
21 #include <sound/core.h>
22 #include <sound/pcm.h>
23 #include <sound/soc.h>
24 #include <sound/jack.h>
25 #include <sound/soc-dapm.h>
26 #include <asm/mach-types.h>
28 #include "../codecs/sgtl5000.h"
31 static int mxs_sgtl5000_hw_params(struct snd_pcm_substream *substream,
32 struct snd_pcm_hw_params *params)
34 struct snd_soc_pcm_runtime *rtd = substream->private_data;
35 struct snd_soc_dai *codec_dai = rtd->codec_dai;
36 struct snd_soc_dai *cpu_dai = rtd->cpu_dai;
37 unsigned int rate = params_rate(params);
41 /* sgtl5000 does not support 512*rate when in 96000 fs */
51 /* Sgtl5000 sysclk should be >= 8MHz and <= 27M */
52 if (mclk < 8000000 || mclk > 27000000)
55 /* Set SGTL5000's SYSCLK (provided by SAIF MCLK) */
56 ret = snd_soc_dai_set_sysclk(codec_dai, SGTL5000_SYSCLK, mclk, 0);
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);
65 /* set codec to slave mode */
66 dai_format = SND_SOC_DAIFMT_I2S | SND_SOC_DAIFMT_NB_NF |
67 SND_SOC_DAIFMT_CBS_CFS;
69 /* set codec DAI configuration */
70 ret = snd_soc_dai_set_fmt(codec_dai, dai_format);
74 /* set cpu DAI configuration */
75 ret = snd_soc_dai_set_fmt(cpu_dai, dai_format);
82 static struct snd_soc_ops mxs_sgtl5000_hifi_ops = {
83 .hw_params = mxs_sgtl5000_hw_params,
86 static struct snd_soc_dai_link mxs_sgtl5000_dai[] = {
89 .stream_name = "HiFi Playback",
90 .codec_dai_name = "sgtl5000",
91 .codec_name = "sgtl5000.0-000a",
92 .cpu_dai_name = "mxs-saif.0",
93 .platform_name = "mxs-pcm-audio.0",
94 .ops = &mxs_sgtl5000_hifi_ops,
98 static struct snd_soc_card mxs_sgtl5000 = {
99 .name = "mxs_sgtl5000",
100 .dai_link = mxs_sgtl5000_dai,
101 .num_links = ARRAY_SIZE(mxs_sgtl5000_dai),
104 static int __devinit mxs_sgtl5000_probe(struct platform_device *pdev)
106 struct snd_soc_card *card = &mxs_sgtl5000;
110 * Set an init clock(11.28Mhz) for sgtl5000 initialization(i2c r/w).
111 * The Sgtl5000 sysclk is derived from saif0 mclk and it's range
112 * should be >= 8MHz and <= 27M.
114 ret = mxs_saif_get_mclk(0, 44100 * 256, 44100);
118 card->dev = &pdev->dev;
119 platform_set_drvdata(pdev, card);
121 ret = snd_soc_register_card(card);
123 dev_err(&pdev->dev, "snd_soc_register_card failed (%d)\n",
131 static int __devexit mxs_sgtl5000_remove(struct platform_device *pdev)
133 struct snd_soc_card *card = platform_get_drvdata(pdev);
135 mxs_saif_put_mclk(0);
137 snd_soc_unregister_card(card);
142 static struct platform_driver mxs_sgtl5000_audio_driver = {
144 .name = "mxs-sgtl5000",
145 .owner = THIS_MODULE,
147 .probe = mxs_sgtl5000_probe,
148 .remove = __devexit_p(mxs_sgtl5000_remove),
151 static int __init mxs_sgtl5000_init(void)
153 return platform_driver_register(&mxs_sgtl5000_audio_driver);
155 module_init(mxs_sgtl5000_init);
157 static void __exit mxs_sgtl5000_exit(void)
159 platform_driver_unregister(&mxs_sgtl5000_audio_driver);
161 module_exit(mxs_sgtl5000_exit);
163 MODULE_AUTHOR("Freescale Semiconductor, Inc.");
164 MODULE_DESCRIPTION("MXS ALSA SoC Machine driver");
165 MODULE_LICENSE("GPL");