ASoC: Davinci: McBSP: add device tree support for McBSP
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>
diff --git a/sound/soc/davinci/Kconfig b/sound/soc/davinci/Kconfig
index 50ca291..6b732d8 100644
--- a/sound/soc/davinci/Kconfig
+++ b/sound/soc/davinci/Kconfig
@@ -16,7 +16,11 @@
- 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"
diff --git a/sound/soc/davinci/davinci-i2s.c b/sound/soc/davinci/davinci-i2s.c
index ec98548..3849616 100644
--- a/sound/soc/davinci/davinci-i2s.c
+++ b/sound/soc/davinci/davinci-i2s.c
@@ -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 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 @@
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 @@
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),
},
};