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ASoC: Davinci: McBSP: add device tree support for McBSP

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This adds DT support for the TI DA8xx/OMAP-L1x/AM17xx/AM18xx McBSP driver.

Signed-off-by: Petr Kulhavy <petr@barix.com>
Reviewed-by: Peter Ujfalusi <peter.ujfalusi@ti.com>
Signed-off-by: Mark Brown <broonie@kernel.org>
This commit is contained in:
Petr Kulhavy 2016-04-18 14:32:41 +02:00 committed by Mark Brown
parent 22225835e2
commit 5f9a50c3e5
2 changed files with 63 additions and 31 deletions
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6
sound/soc/davinci/Kconfig
View File

@ -16,7 +16,11 @@ config SND_EDMA_SOC
- DRA7xx family
config SND_DAVINCI_SOC_I2S
tristate
tristate "DaVinci Multichannel Buffered Serial Port (McBSP) support"
depends on SND_EDMA_SOC
help
Say Y or M here if you want to have support for McBSP IP found in
Texas Instruments DaVinci DA850 SoCs.
config SND_DAVINCI_SOC_MCASP
tristate "Multichannel Audio Serial Port (McASP) support"

88
sound/soc/davinci/davinci-i2s.c
View File

@ -4,9 +4,15 @@
* Author: Vladimir Barinov, <vbarinov@embeddedalley.com>
* Copyright: (C) 2007 MontaVista Software, Inc., <source@mvista.com>
*
* DT support (c) 2016 Petr Kulhavy, Barix AG <petr@barix.com>
* based on davinci-mcasp.c DT support
*
* This program is free software; you can redistribute it and/or modify
* it under the terms of the GNU General Public License version 2 as
* published by the Free Software Foundation.
*
* TODO:
* on DA850 implement HW FIFOs instead of DMA into DXR and DRR registers
*/
#include <linux/init.h>
@ -650,13 +656,24 @@ static const struct snd_soc_component_driver davinci_i2s_component = {
static int davinci_i2s_probe(struct platform_device *pdev)
{
struct snd_dmaengine_dai_dma_data *dma_data;
struct davinci_mcbsp_dev *dev;
struct resource *mem, *res;
void __iomem *io_base;
int *dma;
int ret;
mem = platform_get_resource(pdev, IORESOURCE_MEM, 0);
mem = platform_get_resource_byname(pdev, IORESOURCE_MEM, "mpu");
if (!mem) {
dev_warn(&pdev->dev,
"\"mpu\" mem resource not found, using index 0\n");
mem = platform_get_resource(pdev, IORESOURCE_MEM, 0);
if (!mem) {
dev_err(&pdev->dev, "no mem resource?\n");
return -ENODEV;
}
}
io_base = devm_ioremap_resource(&pdev->dev, mem);
if (IS_ERR(io_base))
return PTR_ERR(io_base);
@ -666,40 +683,44 @@ static int davinci_i2s_probe(struct platform_device *pdev)
if (!dev)
return -ENOMEM;
dev->base = io_base;
/* setup DMA, first TX, then RX */
dma_data = &dev->dma_data[SNDRV_PCM_STREAM_PLAYBACK];
dma_data->addr = (dma_addr_t)(mem->start + DAVINCI_MCBSP_DXR_REG);
res = platform_get_resource(pdev, IORESOURCE_DMA, 0);
if (res) {
dma = &dev->dma_request[SNDRV_PCM_STREAM_PLAYBACK];
*dma = res->start;
dma_data->filter_data = dma;
} else if (IS_ENABLED(CONFIG_OF) && pdev->dev.of_node) {
dma_data->filter_data = "tx";
} else {
dev_err(&pdev->dev, "Missing DMA tx resource\n");
return -ENODEV;
}
dma_data = &dev->dma_data[SNDRV_PCM_STREAM_CAPTURE];
dma_data->addr = (dma_addr_t)(mem->start + DAVINCI_MCBSP_DRR_REG);
res = platform_get_resource(pdev, IORESOURCE_DMA, 1);
if (res) {
dma = &dev->dma_request[SNDRV_PCM_STREAM_CAPTURE];
*dma = res->start;
dma_data->filter_data = dma;
} else if (IS_ENABLED(CONFIG_OF) && pdev->dev.of_node) {
dma_data->filter_data = "rx";
} else {
dev_err(&pdev->dev, "Missing DMA rx resource\n");
return -ENODEV;
}
dev->clk = clk_get(&pdev->dev, NULL);
if (IS_ERR(dev->clk))
return -ENODEV;
clk_enable(dev->clk);
dev->base = io_base;
dev->dma_data[SNDRV_PCM_STREAM_PLAYBACK].addr =
(dma_addr_t)(mem->start + DAVINCI_MCBSP_DXR_REG);
dev->dma_data[SNDRV_PCM_STREAM_CAPTURE].addr =
(dma_addr_t)(mem->start + DAVINCI_MCBSP_DRR_REG);
/* first TX, then RX */
res = platform_get_resource(pdev, IORESOURCE_DMA, 0);
if (!res) {
dev_err(&pdev->dev, "no DMA resource\n");
ret = -ENXIO;
goto err_release_clk;
}
dma = &dev->dma_request[SNDRV_PCM_STREAM_PLAYBACK];
*dma = res->start;
dev->dma_data[SNDRV_PCM_STREAM_PLAYBACK].filter_data = dma;
res = platform_get_resource(pdev, IORESOURCE_DMA, 1);
if (!res) {
dev_err(&pdev->dev, "no DMA resource\n");
ret = -ENXIO;
goto err_release_clk;
}
dma = &dev->dma_request[SNDRV_PCM_STREAM_CAPTURE];
*dma = res->start;
dev->dma_data[SNDRV_PCM_STREAM_CAPTURE].filter_data = dma;
dev->dev = &pdev->dev;
dev_set_drvdata(&pdev->dev, dev);
@ -737,11 +758,18 @@ static int davinci_i2s_remove(struct platform_device *pdev)
return 0;
}
static const struct of_device_id davinci_i2s_match[] = {
{ .compatible = "ti,da850-mcbsp" },
{},
};
MODULE_DEVICE_TABLE(of, davinci_i2s_match);
static struct platform_driver davinci_mcbsp_driver = {
.probe = davinci_i2s_probe,
.remove = davinci_i2s_remove,
.driver = {
.name = "davinci-mcbsp",
.of_match_table = of_match_ptr(davinci_i2s_match),
},
};