How to Enable CS4299 audio codec using AC97 on IMX6q seco platform

[prasannaprabhu7]

Hi All,

I am using IMx6q seco platform and I need some support to enable CS4299 audio codec on my platform. I am currently kernel version 3.0.35.Also I donnot see any cs4299.c in sound/soc/codec or in sound/soc/imx directories and only I see in some patch files applied on sound/pci/ac97/ac97_codec.c file

{ 0x43525930, 0xfffffff8, "CS4299",             patch_cirrus_cs4299,    NULL },

defined in structure

static const struct ac97_codec_id snd_ac97_codec_ids[] = {.

I was going through one of ac97  codec for reference vt1613 which is defined in sound/soc/codec/vt1613.c and sound/soc/imx/imx-ac97-vt1613.c and some configurations I see in board file also

static struct platform_device mx6_seco_q7_imx_audio_device = {

        .name           = "imx-vt1613",

};

static struct platform_device mx6_seco_q7_audio_device = {

       .name           = "vt1613-ac97",

};

#endif

static int imx6q_init_audio(void) {

#ifdef CONFIG_Q7_SND_SOC_IMX_AC97_VT1613

        mxc_register_device(&mx6_seco_q7_imx_audio_device, &mx6_seco_q7_audio_data);

        mxc_register_device(&mx6_seco_q7_audio_device, NULL);

        imx6q_add_imx_ssi(SSI_CH_NUMBER - 1, &mx6_seco_q7_ssi_pdata);

#endif

. Is that 2 driver initialisation are needed?

Please some one help me integrating the same.

Thanks and Regards,
Prasanna

[igorpadykov]

Hi Prasanna

one can add audio codec in kernel board file with SSI in AC97 mode using

static struct imx_ssi_platform_data ssi_pdata = {

    .flags = (IMX_SSI_USE_AC97 | IMX_SSI_DMA),

};

and use attached Porting Guide Chapter 8 Porting Audio Codecs to a

Custom Board

Best regards

igor

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[prasannaprabhu7]

Igor  I am using 3.14.28 kernel version with dts configuration. I have taken reference of vt1613 as vt1613 and cs4299(my current requirement) looks similar. Attached is dts file and machine driver which I have ported to cs4299.Please review the same and let me know if it looks ok to proceed.

Also as there is no driver for cs4299 available in net I have planned to use ac97.c (a generic driver available with kernel) .IS this ok to go forward or should we write a new codec driver for cs4299?? Please guide me on this as I am very new to audio driver and it will be very much helpful.

dts file entry:

      codec_cs4299: codec_cs4299 {

                compatible = "via,ac97-codec";

                status = "disabled";

        };

        sound_cs4299: sound_cs4299 {

                compatible = "fsl,imx-cs4299-audio";

                model = "fsl,imx-cs4299-audio";

                ssi-controller = <&ssi1>;

                audio-codec = <&codec_cs4299>;

                mux-int-port = <1>;

                mux-ext-port = <6>;

                status = "disabled";

        };

        ssi_cs4299: ssi_cs4299 {

                fsl,mode = "ac97-slave";

                pinctrl-names = "default", "ac97-running", "ac97-reset", "ac97-warm-reset";

                pinctrl-0 = <&ac97link_running>;

                pinctrl-1 = <&ac97link_running>;

                pinctrl-2 = <&ac97link_reset>;

                pinctrl-3 = <&ac97link_warm_reset>;

                /* sync, sdata (output), reset */

                ac97-gpios = <&gpio4 19 0 &gpio4 18 0 &gpio4 23 0>;

        };

dio_codec2: cs4299 {

                        code_name = "cs4299";

                        phandle-num-enable = <4>;

                        phandle-list-enable = <&sound_cs4299>,

                                                                <&codec_cs4299>,

                                                                <&ssi1>,

                                                                <&audmux>;

                        phandle-num-set = <1>;

                        phandle-list-set = <&ssi1>;

                        phandle-list-source = <&ssi_cs4299>;

                };

Also Machine driver:

/*

* imx-ac97-cs4299.c -- SoC audio for i.MX Seco UDOO board with

*                                      CS4299 AC'97 codec

* Copyright: Seco s.r.l.

* 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.

*/

#include <linux/module.h>

#include <linux/of_platform.h>

#include <sound/soc.h>

#include <sound/soc-dapm.h>

//#include "../codecs/vt1613.h"

#include "imx-audmux.h"

#include "fsl_ssi.h"

#define DRV_NAME "imx-ac97-cs4299"

static int imx_cs4299_audio_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 *cpu_dai = rtd->cpu_dai;

  int ret;

  ret = snd_soc_dai_set_fmt(cpu_dai, SND_SOC_DAIFMT_AC97

  | SND_SOC_DAIFMT_NB_NF

  | SND_SOC_DAIFMT_CBM_CFS);

  if (ret < 0) {

  dev_err(cpu_dai->dev,

  "Failed to set cpu dai format: %d\n", ret);

  return ret;

  }

  return 0;

}

static struct snd_soc_ops imx_cs4299_audio_ops = {

  .hw_params = imx_cs4299_audio_params,

};

static struct snd_soc_dai_link imx_cs4299_dai = {

  .name = "cs4299-AC97",

  .stream_name = "AC97-analog",

  .codec_dai_name = "ac97-hifi", i

};

static struct snd_soc_card imx_cs4299_card = {

  .name = "imx-cs4299-audio",

  .owner   = THIS_MODULE,

  .dai_link = &imx_cs4299_dai,

  .num_links = 1,

};

static int imx_audmux_ac97_config(struct platform_device *pdev, int intPort, int extPort)

{

  int ret;

        unsigned int ptcr, pdcr;

        intPort = intPort - 1;

        extPort = extPort - 1;

  ptcr = IMX_AUDMUX_V2_PTCR_SYN |

                        IMX_AUDMUX_V2_PTCR_TCLKDIR | IMX_AUDMUX_V2_PTCR_TCSEL(extPort);

  pdcr = IMX_AUDMUX_V2_PDCR_RXDSEL(extPort);

        ret = imx_audmux_v2_configure_port(intPort, ptcr, pdcr);

  if (ret) {

  dev_err(&pdev->dev, "Audmux internal port setup failed\n");

  return ret;

  }

  ptcr = IMX_AUDMUX_V2_PTCR_SYN |

                        IMX_AUDMUX_V2_PTCR_TFSDIR | IMX_AUDMUX_V2_PTCR_TFSEL(intPort);

  pdcr = IMX_AUDMUX_V2_PDCR_RXDSEL(intPort);

        ret = imx_audmux_v2_configure_port(extPort, ptcr, pdcr);

  if (ret) {

  dev_err(&pdev->dev, "Audmux external port setup failed\n");

  return ret;

  }

        return 0;

}

static int imx_cs4299_probe(struct platform_device *pdev)

{

  struct device_node *ssi_np, *codec_np, *np = pdev->dev.of_node;

  struct platform_device *codec_pdev;

  struct platform_device *ssi_pdev;

  int int_port, ext_port;

  int ret;

  ret = of_property_read_u32(np, "mux-int-port", &int_port);

  if (ret) {

  dev_err(&pdev->dev, "mux-int-port property missing or invalid\n");

  return ret;

  }

  ret = of_property_read_u32(np, "mux-ext-port", &ext_port);

  if (ret) {

  dev_err(&pdev->dev, "mux-ext-port property missing or invalid\n");

  return ret;

  }

  ret = imx_audmux_ac97_config(pdev, int_port, ext_port);

  if (ret) {

  dev_err(&pdev->dev, "Audmux port setup failed\n");

  return ret;

  }

  ssi_np = of_parse_phandle(np, "ssi-controller", 0);

  if (!ssi_np) {

  dev_err(&pdev->dev, "ssi-controller phandle missing or invalid\n");

  return -EINVAL;

  }

  ssi_pdev = of_find_device_by_node(ssi_np);

  if (!ssi_pdev) {

  dev_err(&pdev->dev, "Failed to find SSI platform device\n");

  ret = -EINVAL;

  goto fail;

  }

  codec_np = of_parse_phandle(np, "audio-codec", 0);

  if (!codec_np) {

  dev_err(&pdev->dev, "audio-codec phandle missing or invalid\n");

  ret = -EINVAL;

  goto fail;

  }

  codec_pdev = of_find_device_by_node(codec_np);

  if (!codec_pdev) {

  dev_err(&pdev->dev, "Failed to find codec device\n");

  ret = -EINVAL;

  goto fail;

  }

  imx_cs4299_dai.codec_name = dev_name(&codec_pdev->dev);

  imx_cs4299_dai.cpu_of_node = ssi_np;

  imx_cs4299_dai.cpu_dai_name = dev_name(&ssi_pdev->dev);

  imx_cs4299_dai.platform_of_node = ssi_np;

  imx_cs4299_dai.ops = &imx_cs4299_audio_ops;

  imx_cs4299_dai.dai_fmt = SND_SOC_DAIFMT_AC97 | SND_SOC_DAIFMT_NB_NF | SND_SOC_DAIFMT_CBM_CFS;

  imx_cs4299_card.dev = &pdev->dev;

  platform_set_drvdata(pdev, &imx_cs4299_card);

  ret = snd_soc_register_card(&imx_cs4299_card);

  if (ret)

  dev_err(&pdev->dev, "snd_soc_register_card() failed: %d\n", ret);

fail:

  if (ssi_np)

  of_node_put(ssi_np);

  if (codec_np)

  of_node_put(codec_np);

  return ret;

}

static int imx_cs4299_remove(struct platform_device *pdev)

{

  int ret;

  struct snd_soc_card *card = platform_get_drvdata(pdev);

  ret = snd_soc_unregister_card(card);

  return ret;

}

static const struct of_device_id imx_cs4299_audio_match[] = {

  { .compatible = "fsl,imx-cs4299-audio", },

  {}

};

MODULE_DEVICE_TABLE(of, imx_cs4299_audio_match);

static struct platform_driver imx_cs4299_driver = {

  .driver = {

  .name = DRV_NAME,

  .owner = THIS_MODULE,

  .of_match_table = imx_cs4299_audio_match,

  },

  .probe = imx_cs4299_probe,

  .remove = imx_cs4299_remove,

};

module_platform_driver(imx_cs4299_driver);

MODULE_AUTHOR("Seco <info@seco.it>");

MODULE_DESCRIPTION(DRV_NAME ": Freescale i.MX CS4299 AC97 ASoC machine driver");

MODULE_LICENSE("GPL v2");

MODULE_ALIAS("platform:imx-cs4299");

Please review the same and let me know on the same

Thanks and regards,
Prasanna

[prasannaprabhu7]

Thank you for the quick response Igor. I shall try the same and if any issues I shall get back.

Regards,

Prasanna