[alsa-devel] [PATCH V3] ASoC: Davinci: machine: Add device tree binding
Hebbar, Gururaja
gururaja.hebbar at ti.com
Thu Aug 30 06:01:00 CEST 2012
Hi,
Gentle Ping.
On Tue, Aug 28, 2012 at 15:43:50, Hebbar, Gururaja wrote:
> Device tree support for Davinci Machine driver
>
> When the board boots with device tree, the driver will receive card,
> codec, dai interface details (like the card name, DAPM routing map,
> phandle for the audio components described in the dts file, codec mclk
> speed).
> The card will be set up based on this information.
> Since the routing is provided via DT we can mark the card fully routed
> so core can take care of disconnecting the unused pins.
>
> When here, code indentation and comment style is also fixed
>
> Signed-off-by: Hebbar, Gururaja <gururaja.hebbar at ti.com>
> ---
> Changes from V1:
> - Change DT parameter from "ti,codec-clock" to "ti,codec-clock-rate"
> - add more explanation to DT parameters
>
> Changes from V2:
> - Update Documentation details
> - Remove irrelevant commit message
>
> :000000 100644 0000000... b248014... A Documentation/devicetree/bindings/sound/davinci-evm-audio.txt
> :100644 100644 ab0ad45... ca2a547... M sound/soc/davinci/davinci-evm.c
> .../bindings/sound/davinci-evm-audio.txt | 66 +++++++
> sound/soc/davinci/davinci-evm.c | 185 +++++++++++++++++--
> 2 files changed, 231 insertions(+), 20 deletions(-)
>
> diff --git a/Documentation/devicetree/bindings/sound/davinci-evm-audio.txt b/Documentation/devicetree/bindings/sound/davinci-evm-audio.txt
> new file mode 100644
> index 0000000..b248014
> --- /dev/null
> +++ b/Documentation/devicetree/bindings/sound/davinci-evm-audio.txt
> @@ -0,0 +1,66 @@
> +* Texas Instruments SoC audio setups with TLV320AIC3X Codec
> +
> +Required properties:
> +- compatible : "ti,davinci-evm-audio"
> +- ti,model : The user-visible name of this sound complex.
> +- ti,audio-routing : A list of the connections between audio components.
> + Each entry is a pair of strings, the first being the connection's sink,
> + the second being the connection's source. Valid names for sources and
> + sinks are the codec's pins, and the jacks on the board:
> +
> + Codec pins:
> +
> + * MIC3L
> + * MIC3R
> + * LINE1L
> + * LINE2L
> + * LINE1R
> + * LINE2R
> +
> + Board connectors:
> +
> + * Headphone Jack
> + * Line Out
> + * Mic Jack
> +
> +- ti,mcasp-controller : The phandle of the McASP controller
> +- ti,audio-codec : The phandle of the TLV320AIC3x audio codec
> +- ti,codec-clock-rate : The Codec Clock rate (in Hz) applied to the Codec
> +
> +- dai-data : A list of DAI data used by SOC code to register
> + DAI, Codecs platform.
> + The string index "should" be as shown below.
> +dai-data =
> +"<DAI Name>", "<DAI Stream Name>",
> +"<CODEC DAI Name>", "<true if evm_aic3x_init is required, else false>",
> +"<evm ops required (evm_ops or evm_spdif_ops)>";
> +
> +Here fields
> +"<DAI Name>" : used to indicate the DAI Name
> +"<DAI Stream Name>" : used to indicate the Stream Name
> +"<CODEC DAI Name>" : used to bind the link between Codec DAI and ASOC DAI
> +
> +Machine related options
> +"<true/false>" : Whether the machine specific initialization
> + : evm_aic3x_init() is required
> +
> +"<evm ops required>" : Which hardware ops function is to be used.
> + : (evm_ops or evm_spdif_ops)
> + : use evm-spdif-ops if DAI is working in DIT mode
> + : else use evm-ops. These ops setup hw param callbacks
> + : which are used to setup CODEC/cpu DAI configuration
> + : and codec system clock.
> +
> +Example:
> +
> +sound {
> + compatible = "ti,davinci-evm-audio";
> + ti,model = "DA830 EVM";
> + ti,audio-codec = <&tlv320aic3x>;
> + ti,mcasp-controller = <&mcasp1>;
> + ti,codec-clock-rate = <12000000>;
> + dai-data =
> + "TLV320AIC3X", "AIC3X",
> + "tlv320aic3x-hifi", "true",
> + "evm-ops";
> +};
> diff --git a/sound/soc/davinci/davinci-evm.c b/sound/soc/davinci/davinci-evm.c
> index ab0ad45..ca2a547 100644
> --- a/sound/soc/davinci/davinci-evm.c
> +++ b/sound/soc/davinci/davinci-evm.c
> @@ -34,27 +34,38 @@ static int evm_hw_params(struct snd_pcm_substream *substream,
> 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;
> + struct snd_soc_codec *codec = rtd->codec;
> + struct snd_soc_card *soc_card = codec->card;
> + struct device_node *np = soc_card->dev->of_node;
> int ret = 0;
> unsigned sysclk;
>
> - /* ASP1 on DM355 EVM is clocked by an external oscillator */
> - if (machine_is_davinci_dm355_evm() || machine_is_davinci_dm6467_evm() ||
> - machine_is_davinci_dm365_evm())
> - sysclk = 27000000;
> -
> - /* ASP0 in DM6446 EVM is clocked by U55, as configured by
> - * board-dm644x-evm.c using GPIOs from U18. There are six
> - * options; here we "know" we use a 48 KHz sample rate.
> - */
> - else if (machine_is_davinci_evm())
> - sysclk = 12288000;
> -
> - else if (machine_is_davinci_da830_evm() ||
> - machine_is_davinci_da850_evm())
> - sysclk = 24576000;
> -
> - else
> - return -EINVAL;
> + if (np) {
> + ret = of_property_read_u32(np, "ti,codec-clock-rate", &sysclk);
> + if (ret < 0)
> + return ret;
> + } else {
> + /* ASP1 on DM355 EVM is clocked by an external oscillator */
> + if (machine_is_davinci_dm355_evm() ||
> + machine_is_davinci_dm6467_evm() ||
> + machine_is_davinci_dm365_evm())
> + sysclk = 27000000;
> +
> + /*
> + * ASP0 in DM6446 EVM is clocked by U55, as configured by
> + * board-dm644x-evm.c using GPIOs from U18. There are six
> + * options; here we "know" we use a 48 KHz sample rate.
> + */
> + else if (machine_is_davinci_evm())
> + sysclk = 12288000;
> +
> + else if (machine_is_davinci_da830_evm() ||
> + machine_is_davinci_da850_evm())
> + sysclk = 24576000;
> +
> + else
> + return -EINVAL;
> + }
>
> /* set codec DAI configuration */
> ret = snd_soc_dai_set_fmt(codec_dai, AUDIO_FORMAT);
> @@ -127,13 +138,22 @@ static int evm_aic3x_init(struct snd_soc_pcm_runtime *rtd)
> {
> struct snd_soc_codec *codec = rtd->codec;
> struct snd_soc_dapm_context *dapm = &codec->dapm;
> + struct device_node *np = codec->card->dev->of_node;
> + int ret;
>
> /* Add davinci-evm specific widgets */
> snd_soc_dapm_new_controls(dapm, aic3x_dapm_widgets,
> ARRAY_SIZE(aic3x_dapm_widgets));
>
> - /* Set up davinci-evm specific audio path audio_map */
> - snd_soc_dapm_add_routes(dapm, audio_map, ARRAY_SIZE(audio_map));
> + if (np) {
> + ret = snd_soc_of_parse_audio_routing(codec->card,
> + "ti,audio-routing");
> + if (ret)
> + return ret;
> + } else {
> + /* Set up davinci-evm specific audio path audio_map */
> + snd_soc_dapm_add_routes(dapm, audio_map, ARRAY_SIZE(audio_map));
> + }
>
> /* not connected */
> snd_soc_dapm_disable_pin(dapm, "MONO_LOUT");
> @@ -282,6 +302,113 @@ static struct snd_soc_card da850_snd_soc_card = {
> .num_links = 1,
> };
>
> +#if defined(CONFIG_OF)
> +/*
> + * This struct is just used as place holder. It will be filled with
> + * data from dt node
> + */
> +static struct snd_soc_dai_link evm_dai = {
> +};
> +
> +/* davinci evm audio machine driver */
> +static struct snd_soc_card evm_soc_card = {
> + .owner = THIS_MODULE,
> + .dai_link = &evm_dai,
> + .num_links = 1,
> +};
> +
> +static int davinci_evm_probe(struct platform_device *pdev)
> +{
> + struct device_node *np = pdev->dev.of_node;
> + const char *stringPtr, *propname;
> + u32 val;
> + int ret = 0;
> +
> + propname = "dai-data";
> + val = of_property_count_strings(np, propname);
> + if (val < 0)
> + return val;
> +
> + ret = of_property_read_string_index(np, propname, 0, &evm_dai.name);
> + if (ret < 0)
> + return ret;
> +
> + ret = of_property_read_string_index(np, propname, 1,
> + &evm_dai.stream_name);
> + if (ret < 0)
> + return ret;
> +
> + ret = of_property_read_string_index(np, propname, 2,
> + &evm_dai.codec_dai_name);
> + if (ret < 0)
> + return ret;
> +
> + ret = of_property_read_string_index(np, propname, 3, &stringPtr);
> + if (ret < 0)
> + return ret;
> + else
> + if (strcasecmp(stringPtr, "true") == 0)
> + evm_dai.init = evm_aic3x_init;
> +
> + ret = of_property_read_string_index(np, propname, 4, &stringPtr);
> + if (ret < 0) {
> + return ret;
> + } else {
> + if (strcasecmp(stringPtr, "evm-ops") == 0)
> + evm_dai.ops = &evm_ops;
> + else if (strcasecmp(stringPtr, "evm-spdif-ops") == 0)
> + evm_dai.ops = &evm_spdif_ops;
> + }
> +
> + evm_dai.codec_of_node = of_parse_phandle(np, "ti,audio-codec", 0);
> + if (!evm_dai.codec_of_node)
> + return -EINVAL;
> +
> + evm_dai.cpu_dai_of_node = of_parse_phandle(np,
> + "ti,mcasp-controller", 0);
> + if (!evm_dai.cpu_dai_of_node)
> + return -EINVAL;
> +
> + evm_dai.platform_of_node = evm_dai.cpu_dai_of_node;
> +
> + evm_soc_card.dev = &pdev->dev;
> + ret = snd_soc_of_parse_card_name(&evm_soc_card, "ti,model");
> + if (ret)
> + return ret;
> +
> + ret = snd_soc_register_card(&evm_soc_card);
> + if (ret)
> + dev_err(&pdev->dev, "snd_soc_register_card failed (%d)\n", ret);
> +
> + return ret;
> +}
> +
> +static int __devexit davinci_evm_remove(struct platform_device *pdev)
> +{
> + struct snd_soc_card *card = platform_get_drvdata(pdev);
> +
> + snd_soc_unregister_card(card);
> +
> + return 0;
> +}
> +
> +static const struct of_device_id davinci_evm_dt_ids[] = {
> + { .compatible = "ti,davinci-evm-audio", },
> + { /* sentinel */ }
> +};
> +MODULE_DEVICE_TABLE(of, davinci_mcasp_dt_ids);
> +
> +static struct platform_driver davinci_evm_driver = {
> + .probe = davinci_evm_probe,
> + .remove = __devexit_p(davinci_evm_remove),
> + .driver = {
> + .name = "davinci_evm",
> + .owner = THIS_MODULE,
> + .of_match_table = of_match_ptr(davinci_evm_dt_ids),
> + },
> +};
> +#endif
> +
> static struct platform_device *evm_snd_device;
>
> static int __init evm_init(void)
> @@ -289,6 +416,14 @@ static int __init evm_init(void)
> struct snd_soc_card *evm_snd_dev_data;
> int index;
> int ret;
> +#if defined(CONFIG_OF)
> + struct device_node *np;
> +
> + np = of_find_compatible_node(NULL, NULL, "ti,davinci-evm-audio");
> + if (np) {
> + return platform_driver_register(&davinci_evm_driver);
> + }
> +#endif
>
> if (machine_is_davinci_evm()) {
> evm_snd_dev_data = &dm6446_snd_soc_card_evm;
> @@ -325,6 +460,16 @@ static int __init evm_init(void)
>
> static void __exit evm_exit(void)
> {
> +#if defined(CONFIG_OF)
> + struct device_node *np;
> +
> + np = of_find_compatible_node(NULL, NULL, "ti,davinci-evm-audio");
> + if (np) {
> + platform_driver_unregister(&davinci_evm_driver);
> + return;
> + }
> +#endif
> +
> platform_device_unregister(evm_snd_device);
> }
>
> --
> 1.7.1
>
>
Regards,
Gururaja
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