Add device tree probe for McASP driver. Note: DMA parameters are not populated from DT and will be done later.
Signed-off-by: Hebbar, Gururaja <[email protected]> --- :000000 100644 0000000... 692659e... A Documentation/devicetree/bindings/sound/davinci-mcasp-audio.txt :100644 100644 6a2c54c... db7756a... M sound/soc/davinci/davinci-mcasp.c .../bindings/sound/davinci-mcasp-audio.txt | 43 ++++++++ sound/soc/davinci/davinci-mcasp.c | 113 +++++++++++++++++++- 2 files changed, 155 insertions(+), 1 deletions(-) diff --git a/Documentation/devicetree/bindings/sound/davinci-mcasp-audio.txt b/Documentation/devicetree/bindings/sound/davinci-mcasp-audio.txt new file mode 100644 index 0000000..692659e --- /dev/null +++ b/Documentation/devicetree/bindings/sound/davinci-mcasp-audio.txt @@ -0,0 +1,43 @@ +Texas Instruments McASP controller + +Required properties: +- compatible : + "ti,dm646x-mcasp-audio" : for DM646x platforms + "ti,da830-mcasp-audio" : for both DA830 & DA850 platforms + +- reg : Should contain McASP registers offset and length +- interrupts : Interrupt number for McASP +- op-mode : I2S/DIT ops mode. +- tdm-slots : Slots for TDM operation. +- num-serializer : Serializers used by McASP. +- serial-dir : A list of serializer pin mode. The list number should be equal + to "num-serializer" parameter. Each entry is a number indication + serializer pin direction. (0 - INACTIVE, 1 - TX, 2 - RX) + + +Optional properties: + +- ti,hwmods : Must be "mcasp<n>", n is controller instance starting 0 +- tx-num-evt : FIFO levels. +- rx-num-evt : FIFO levels. + + +Example: + +mcasp0: mcasp0@1d00000 { + compatible = "ti,da830-mcasp-audio"; + #address-cells = <1>; + #size-cells = <0>; + reg = <0x100000 0x3000>; + interrupts = <82 83>; + op-mode = <0>; /* MCASP_IIS_MODE */ + tdm-slots = <2>; + num-serializer = <16>; + serial-dir = < + 0 0 0 0 /* 0: INACTIVE, 1: TX, 2: RX */ + 0 0 0 0 + 0 0 0 1 + 2 0 0 0 >; + tx-num-evt = <1>; + rx-num-evt = <1>; +}; diff --git a/sound/soc/davinci/davinci-mcasp.c b/sound/soc/davinci/davinci-mcasp.c index 6a2c54c..db7756a 100644 --- a/sound/soc/davinci/davinci-mcasp.c +++ b/sound/soc/davinci/davinci-mcasp.c @@ -22,6 +22,9 @@ #include <linux/delay.h> #include <linux/io.h> #include <linux/pm_runtime.h> +#include <linux/of.h> +#include <linux/of_platform.h> +#include <linux/of_device.h> #include <sound/core.h> #include <sound/pcm.h> @@ -862,19 +865,127 @@ static struct snd_soc_dai_driver davinci_mcasp_dai[] = { }; +static const struct of_device_id mcasp_dt_ids[] = { + { + .compatible = "ti,dm646x-mcasp-audio", + .data = (void *)MCASP_VERSION_1, + }, + { + .compatible = "ti,da830-mcasp-audio", + .data = (void *)MCASP_VERSION_2, + }, + { /* sentinel */ } +}; +MODULE_DEVICE_TABLE(of, mcasp_dt_ids); + +static u8 of_serial_dir[16]; + +static struct snd_platform_data *davinci_mcasp_set_pdata_from_of( + struct platform_device *pdev) +{ + struct device_node *np = pdev->dev.of_node; + struct snd_platform_data *pdata = NULL; + const struct of_device_id *match = + of_match_device(of_match_ptr(mcasp_dt_ids), &pdev->dev); + + const u32 *of_serial_dir32; + u32 val; + int i, ret = 0; + + if (pdev->dev.platform_data) { + pdata = pdev->dev.platform_data; + return pdata; + } else if (match) { + pdata = devm_kzalloc(&pdev->dev, sizeof(*pdata), GFP_KERNEL); + if (!pdata) { + ret = -ENOMEM; + goto nodata; + } + } else { + /* control shouldn't reach here. something is wrong */ + ret = -EINVAL; + goto nodata; + } + + if (match->data) + pdata->version = (u8)((int)match->data); + + ret = of_property_read_u32(np, "op-mode", &val); + if (ret < 0) + goto nodata; + pdata->op_mode = val; + + ret = of_property_read_u32(np, "tdm-slots", &pdata->tdm_slots); + if (ret < 0) + goto nodata; + + ret = of_property_read_u32(np, "num-serializer", &val); + if (ret < 0) + goto nodata; + pdata->num_serializer = val; + + of_serial_dir32 = of_get_property(np, "serial-dir", &val); + val /= sizeof(u32); + if (val != pdata->num_serializer) { + ret = -EINVAL; + goto nodata; + } + + if (of_serial_dir32) { + for (i = 0; i < pdata->num_serializer; i++) + of_serial_dir[i] = be32_to_cpup(&of_serial_dir32[i]); + + pdata->serial_dir = of_serial_dir; + } + + ret = of_property_read_u32(np, "tx-num-evt", &val); + if (ret >= 0) + pdata->txnumevt = val; + + ret = of_property_read_u32(np, "rx-num-evt", &val); + if (ret >= 0) + pdata->rxnumevt = val; + + ret = of_property_read_u32(np, "sram-size-playback", &val); + if (ret >= 0) + pdata->sram_size_playback = val; + + ret = of_property_read_u32(np, "sram-size-capture", &val); + if (ret >= 0) + pdata->sram_size_capture = val; + +nodata: + if (ret < 0) + dev_err(&pdev->dev, "Error populating platform data, err %d\n", + ret); + return pdata; +} + static int davinci_mcasp_probe(struct platform_device *pdev) { struct davinci_pcm_dma_params *dma_data; struct resource *mem, *ioarea, *res; struct snd_platform_data *pdata; struct davinci_audio_dev *dev; + int ret; + if (!pdev->dev.platform_data && !pdev->dev.of_node) { + dev_err(&pdev->dev, "No platform data supplied\n"); + return -EINVAL; + } + dev = devm_kzalloc(&pdev->dev, sizeof(struct davinci_audio_dev), GFP_KERNEL); if (!dev) return -ENOMEM; + pdata = davinci_mcasp_set_pdata_from_of(pdev); + if (!pdata) { + dev_err(&pdev->dev, "no platform data\n"); + return -EINVAL; + } + mem = platform_get_resource(pdev, IORESOURCE_MEM, 0); if (!mem) { dev_err(&pdev->dev, "no mem resource?\n"); @@ -888,7 +999,6 @@ static int davinci_mcasp_probe(struct platform_device *pdev) return -EBUSY; } - pdata = pdev->dev.platform_data; pm_runtime_enable(&pdev->dev); ret = pm_runtime_get_sync(&pdev->dev); @@ -976,6 +1086,7 @@ static struct platform_driver davinci_mcasp_driver = { .driver = { .name = "davinci-mcasp", .owner = THIS_MODULE, + .of_match_table = of_match_ptr(mcasp_dt_ids), }, }; -- 1.7.1 _______________________________________________ Davinci-linux-open-source mailing list [email protected] http://linux.davincidsp.com/mailman/listinfo/davinci-linux-open-source
