[PATCH V3] ASoC: Davinci: machine: Add device tree binding
Hebbar, Gururaja
gururaja.hebbar at ti.com
Fri Aug 31 04:55:39 EDT 2012
Gentle Ping. Any updates about this version or can it be pulled into the tree.
On Thu, Aug 30, 2012 at 09:29:55, Hebbar, Gururaja wrote:
>
> 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
>
Regards,
Gururaja
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