diff options
Diffstat (limited to 'kernel/sound/soc/mxs/mxs-sgtl5000.c')
| -rw-r--r-- | kernel/sound/soc/mxs/mxs-sgtl5000.c | 186 |
1 files changed, 186 insertions, 0 deletions
diff --git a/kernel/sound/soc/mxs/mxs-sgtl5000.c b/kernel/sound/soc/mxs/mxs-sgtl5000.c new file mode 100644 index 000000000..6e6fce6a1 --- /dev/null +++ b/kernel/sound/soc/mxs/mxs-sgtl5000.c @@ -0,0 +1,186 @@ +/* + * Copyright 2011 Freescale Semiconductor, Inc. + * + * This program is free software; you can redistribute it and/or modify + * it under the terms of the GNU General Public License as published by + * the Free Software Foundation; either version 2 of the License, or + * (at your option) any later version. + * + * 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. + * + * You should have received a copy of the GNU General Public License along + * with this program; if not, write to the Free Software Foundation, Inc., + * 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA. + */ + +#include <linux/module.h> +#include <linux/device.h> +#include <linux/of.h> +#include <linux/of_device.h> +#include <sound/core.h> +#include <sound/pcm.h> +#include <sound/soc.h> +#include <sound/jack.h> +#include <sound/soc-dapm.h> + +#include "../codecs/sgtl5000.h" +#include "mxs-saif.h" + +static int mxs_sgtl5000_hw_params(struct snd_pcm_substream *substream, + struct snd_pcm_hw_params *params) +{ + struct snd_soc_pcm_runtime *rtd = substream->private_data; + struct snd_soc_dai *codec_dai = rtd->codec_dai; + struct snd_soc_dai *cpu_dai = rtd->cpu_dai; + unsigned int rate = params_rate(params); + u32 mclk; + int ret; + + /* sgtl5000 does not support 512*rate when in 96000 fs */ + switch (rate) { + case 96000: + mclk = 256 * rate; + break; + default: + mclk = 512 * rate; + break; + } + + /* Set SGTL5000's SYSCLK (provided by SAIF MCLK) */ + ret = snd_soc_dai_set_sysclk(codec_dai, SGTL5000_SYSCLK, mclk, 0); + if (ret) { + dev_err(codec_dai->dev, "Failed to set sysclk to %u.%03uMHz\n", + mclk / 1000000, mclk / 1000 % 1000); + return ret; + } + + /* The SAIF MCLK should be the same as SGTL5000_SYSCLK */ + ret = snd_soc_dai_set_sysclk(cpu_dai, MXS_SAIF_MCLK, mclk, 0); + if (ret) { + dev_err(cpu_dai->dev, "Failed to set sysclk to %u.%03uMHz\n", + mclk / 1000000, mclk / 1000 % 1000); + return ret; + } + + return 0; +} + +static struct snd_soc_ops mxs_sgtl5000_hifi_ops = { + .hw_params = mxs_sgtl5000_hw_params, +}; + +#define MXS_SGTL5000_DAI_FMT (SND_SOC_DAIFMT_I2S | SND_SOC_DAIFMT_NB_NF | \ + SND_SOC_DAIFMT_CBS_CFS) + +static struct snd_soc_dai_link mxs_sgtl5000_dai[] = { + { + .name = "HiFi Tx", + .stream_name = "HiFi Playback", + .codec_dai_name = "sgtl5000", + .dai_fmt = MXS_SGTL5000_DAI_FMT, + .ops = &mxs_sgtl5000_hifi_ops, + .playback_only = true, + }, { + .name = "HiFi Rx", + .stream_name = "HiFi Capture", + .codec_dai_name = "sgtl5000", + .dai_fmt = MXS_SGTL5000_DAI_FMT, + .ops = &mxs_sgtl5000_hifi_ops, + .capture_only = true, + }, +}; + +static struct snd_soc_card mxs_sgtl5000 = { + .name = "mxs_sgtl5000", + .owner = THIS_MODULE, + .dai_link = mxs_sgtl5000_dai, + .num_links = ARRAY_SIZE(mxs_sgtl5000_dai), +}; + +static int mxs_sgtl5000_probe(struct platform_device *pdev) +{ + struct snd_soc_card *card = &mxs_sgtl5000; + int ret, i; + struct device_node *np = pdev->dev.of_node; + struct device_node *saif_np[2], *codec_np; + + saif_np[0] = of_parse_phandle(np, "saif-controllers", 0); + saif_np[1] = of_parse_phandle(np, "saif-controllers", 1); + codec_np = of_parse_phandle(np, "audio-codec", 0); + if (!saif_np[0] || !saif_np[1] || !codec_np) { + dev_err(&pdev->dev, "phandle missing or invalid\n"); + return -EINVAL; + } + + for (i = 0; i < 2; i++) { + mxs_sgtl5000_dai[i].codec_name = NULL; + mxs_sgtl5000_dai[i].codec_of_node = codec_np; + mxs_sgtl5000_dai[i].cpu_dai_name = NULL; + mxs_sgtl5000_dai[i].cpu_of_node = saif_np[i]; + mxs_sgtl5000_dai[i].platform_name = NULL; + mxs_sgtl5000_dai[i].platform_of_node = saif_np[i]; + } + + of_node_put(codec_np); + of_node_put(saif_np[0]); + of_node_put(saif_np[1]); + + /* + * Set an init clock(11.28Mhz) for sgtl5000 initialization(i2c r/w). + * The Sgtl5000 sysclk is derived from saif0 mclk and it's range + * should be >= 8MHz and <= 27M. + */ + ret = mxs_saif_get_mclk(0, 44100 * 256, 44100); + if (ret) { + dev_err(&pdev->dev, "failed to get mclk\n"); + return ret; + } + + card->dev = &pdev->dev; + platform_set_drvdata(pdev, card); + + ret = snd_soc_register_card(card); + if (ret) { + dev_err(&pdev->dev, "snd_soc_register_card failed (%d)\n", + ret); + return ret; + } + + return 0; +} + +static int mxs_sgtl5000_remove(struct platform_device *pdev) +{ + struct snd_soc_card *card = platform_get_drvdata(pdev); + + mxs_saif_put_mclk(0); + + snd_soc_unregister_card(card); + + return 0; +} + +static const struct of_device_id mxs_sgtl5000_dt_ids[] = { + { .compatible = "fsl,mxs-audio-sgtl5000", }, + { /* sentinel */ } +}; +MODULE_DEVICE_TABLE(of, mxs_sgtl5000_dt_ids); + +static struct platform_driver mxs_sgtl5000_audio_driver = { + .driver = { + .name = "mxs-sgtl5000", + .of_match_table = mxs_sgtl5000_dt_ids, + }, + .probe = mxs_sgtl5000_probe, + .remove = mxs_sgtl5000_remove, +}; + +module_platform_driver(mxs_sgtl5000_audio_driver); + +MODULE_AUTHOR("Freescale Semiconductor, Inc."); +MODULE_DESCRIPTION("MXS ALSA SoC Machine driver"); +MODULE_LICENSE("GPL"); +MODULE_ALIAS("platform:mxs-sgtl5000"); |