diff options
Diffstat (limited to 'sound/soc/imx/imx-spdif-dai.c')
| -rw-r--r-- | sound/soc/imx/imx-spdif-dai.c | 137 |
1 files changed, 137 insertions, 0 deletions
diff --git a/sound/soc/imx/imx-spdif-dai.c b/sound/soc/imx/imx-spdif-dai.c new file mode 100644 index 00000000000..a3b38658c6f --- /dev/null +++ b/sound/soc/imx/imx-spdif-dai.c @@ -0,0 +1,137 @@ +/* + * ALSA SoC SPDIF Audio Layer for MXS + * + * Copyright (C) 2008-2011 Freescale Semiconductor, Inc. + * + * Based on stmp3xxx_spdif_dai.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/init.h> +#include <linux/module.h> +#include <linux/dma-mapping.h> +#include <linux/clk.h> +#include <linux/delay.h> +#include <sound/core.h> +#include <sound/pcm.h> +#include <sound/soc.h> +#include <mach/dma.h> +#include <mach/hardware.h> + +#include "../codecs/mxc_spdif.h" + +#define MXC_SPDIF_TXFIFO_WML 0x8 +#define MXC_SPDIF_RXFIFO_WML 0x8 + +struct imx_pcm_dma_params dma_params_tx; +struct imx_pcm_dma_params dma_params_rx; + +static int imx_spdif_hw_params(struct snd_pcm_substream *substream, + struct snd_pcm_hw_params *params, + struct snd_soc_dai *cpu_dai) +{ + /* Tx/Rx config */ + if (substream->stream == SNDRV_PCM_STREAM_PLAYBACK) + snd_soc_dai_set_dma_data(cpu_dai, substream, &dma_params_tx); + else + snd_soc_dai_set_dma_data(cpu_dai, substream, &dma_params_rx); + + return 0; +} + +struct snd_soc_dai_ops imx_spdif_dai_ops = { + .hw_params = imx_spdif_hw_params, +}; + +struct snd_soc_dai_driver imx_spdif_dai = { + .playback = { + .channels_min = 2, + .channels_max = 2, + .rates = MXC_SPDIF_RATES_PLAYBACK, + .formats = MXC_SPDIF_FORMATS_PLAYBACK, + }, + .capture = { + .channels_min = 2, + .channels_max = 2, + .rates = MXC_SPDIF_RATES_CAPTURE, + .formats = MXC_SPDIF_FORMATS_CAPTURE, + }, + .ops = &imx_spdif_dai_ops, +}; + +static int imx_spdif_dai_probe(struct platform_device *pdev) +{ + struct resource *res; + int ret = 0; + + dma_params_tx.burstsize = MXC_SPDIF_TXFIFO_WML; + dma_params_rx.burstsize = MXC_SPDIF_RXFIFO_WML; + + dma_params_tx.peripheral_type = IMX_DMATYPE_SPDIF; + dma_params_rx.peripheral_type = IMX_DMATYPE_SPDIF; + + res = platform_get_resource_byname(pdev, IORESOURCE_DMA, "tx"); + if (res) + dma_params_tx.dma = res->start; + + res = platform_get_resource_byname(pdev, IORESOURCE_DMA, "rx"); + if (res) + dma_params_rx.dma = res->start; + + res = platform_get_resource_byname(pdev, IORESOURCE_DMA, "tx_reg"); + if (res) + dma_params_tx.dma_addr = res->start; + + res = platform_get_resource_byname(pdev, IORESOURCE_DMA, "rx_reg"); + if (res) + dma_params_rx.dma_addr = res->start; + + ret = snd_soc_register_dai(&pdev->dev, &imx_spdif_dai); + if (ret) { + dev_err(&pdev->dev, "register DAI failed\n"); + goto failed_register; + } + + return 0; + +failed_register: + return ret; +} + +static int __devexit imx_spdif_dai_remove(struct platform_device *pdev) +{ + snd_soc_unregister_dai(&pdev->dev); + return 0; +} + +static struct platform_driver imx_ssi_driver = { + .probe = imx_spdif_dai_probe, + .remove = __devexit_p(imx_spdif_dai_remove), + + .driver = { + .name = "imx-spdif-dai", + .owner = THIS_MODULE, + }, +}; + +static int __init imx_spdif_dai_init(void) +{ + return platform_driver_register(&imx_ssi_driver); +} + +static void __exit imx_spdif_dai_exit(void) +{ + platform_driver_unregister(&imx_ssi_driver); +} +module_init(imx_spdif_dai_init); +module_exit(imx_spdif_dai_exit); + +MODULE_AUTHOR("Freescale Semiconductor, Inc."); +MODULE_DESCRIPTION("IMX SPDIF DAI"); +MODULE_LICENSE("GPL"); |