diff options
Diffstat (limited to 'sound/soc/imx/imx-spdif.c')
| -rw-r--r-- | sound/soc/imx/imx-spdif.c | 144 |
1 files changed, 144 insertions, 0 deletions
diff --git a/sound/soc/imx/imx-spdif.c b/sound/soc/imx/imx-spdif.c new file mode 100644 index 00000000000..f336545f921 --- /dev/null +++ b/sound/soc/imx/imx-spdif.c @@ -0,0 +1,144 @@ +/* + * ASoC S/PDIF driver for IMX development boards + * + * Copyright (C) 2008-2011 Freescale Semiconductor, Inc. + * + * based on stmp3780_devb_spdif.c + * + * Vladimir Barinov <vbarinov@embeddedalley.com> + * + * Copyright 2008 SigmaTel, Inc + * Copyright 2008 Embedded Alley Solutions, Inc + * + * This file is licensed under the terms of the GNU General Public License + * version 2. This program is licensed "as is" without any warranty of any + * kind, whether express or implied. + */ +#include <linux/module.h> +#include <linux/moduleparam.h> +#include <linux/timer.h> +#include <linux/interrupt.h> +#include <linux/platform_device.h> +#include <linux/slab.h> + +#include <sound/core.h> +#include <sound/pcm.h> +#include <sound/soc.h> +#include <sound/soc-dapm.h> + +#include <asm/mach-types.h> +#include <asm/dma.h> +#include <mach/hardware.h> + +#include "imx-ssi.h" +#include "../codecs/mxc_spdif.h" + +/* imx digital audio interface glue - connects codec <--> CPU */ +static struct snd_soc_dai_link imx_spdif_dai_link = { + .name = "IMX SPDIF", + .stream_name = "IMX SPDIF", + .codec_dai_name = "mxc-spdif", + .codec_name = "mxc_spdif.0", + .cpu_dai_name = "imx-spdif-dai.0", + .platform_name = "imx-pcm-audio.2", /* imx-pcm-dma-mx2 */ +}; + +static struct snd_soc_card snd_soc_card_imx_spdif = { + .name = "imx-spdif", + .dai_link = &imx_spdif_dai_link, + .num_links = 1, +}; + +static int __devinit imx_spdif_audio_probe(struct platform_device *pdev) +{ + struct imx_ssi *ssi; + int ret; + + ssi = kzalloc(sizeof(*ssi), GFP_KERNEL); + if (!ssi) + return -ENOMEM; + + dev_set_drvdata(&pdev->dev, ssi); + + ssi->soc_platform_pdev = platform_device_alloc("imx-pcm-audio", 2); + if (!ssi->soc_platform_pdev) { + pr_err("%s failed platform_device_alloc\n", __func__); + return -ENOMEM; + } + + /* It may seem weird to be using struct imx_ssi here because S/PDIF + doesn't use ssi. We only use soc_platform_pdev in struct imx_ssi. + But we need it because imx-pcm-dma-mx2 initializes other fields. */ + platform_set_drvdata(ssi->soc_platform_pdev, ssi); + + ret = platform_device_add(ssi->soc_platform_pdev); + if (ret) { + dev_err(&pdev->dev, "failed to add platform device\n"); + platform_device_put(ssi->soc_platform_pdev); + return ret; + } + + return 0; +} + +static int __devexit imx_spdif_audio_remove(struct platform_device *pdev) +{ + struct imx_ssi *ssi = platform_get_drvdata(pdev); + + platform_device_unregister(ssi->soc_platform_pdev); + snd_soc_unregister_dai(&pdev->dev); + kfree(ssi); + + return 0; +} + +static struct platform_driver imx_spdif_audio_driver = { + .probe = imx_spdif_audio_probe, + .remove = __devexit_p(imx_spdif_audio_remove), + .driver = { + .name = "imx-spdif-audio-device", + .owner = THIS_MODULE, + }, +}; + +static struct platform_device *imx_spdif_snd_device; + +static int __init imx_spdif_init(void) +{ + int ret = 0; + + ret = platform_driver_register(&imx_spdif_audio_driver); + if (ret) { + pr_err("%s - failed platform_driver_register\n", __func__); + return -ENOMEM; + } + + imx_spdif_snd_device = platform_device_alloc("soc-audio", 1); + if (!imx_spdif_snd_device) { + pr_err("%s - failed platform_device_alloc\n", __func__); + return -ENOMEM; + } + + platform_set_drvdata(imx_spdif_snd_device, &snd_soc_card_imx_spdif); + + ret = platform_device_add(imx_spdif_snd_device); + if (ret) { + pr_err("ASoC S/PDIF: Platform device allocation failed\n"); + platform_device_put(imx_spdif_snd_device); + } + + return ret; +} + +static void __exit imx_spdif_exit(void) +{ + platform_driver_unregister(&imx_spdif_audio_driver); + platform_device_unregister(imx_spdif_snd_device); +} + +module_init(imx_spdif_init); +module_exit(imx_spdif_exit); + +MODULE_AUTHOR("Freescale Semiconductor, Inc."); +MODULE_DESCRIPTION("IMX EVK development board ASoC driver"); +MODULE_LICENSE("GPL"); |