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authorPeter Ujfalusi <peter.ujfalusi@ti.com>2020-02-10 17:09:49 +0300
committerMark Brown <broonie@kernel.org>2020-02-11 14:47:55 +0300
commit2619e03703475b7e0a6f73f85e642859cd25dfc8 (patch)
treedea04e24f95bd633480b01c76960ea27a3f5e3c7
parentea00d95200d02ece71f5814d41b14f2eb16d598b (diff)
downloadlinux-2619e03703475b7e0a6f73f85e642859cd25dfc8.tar.xz
ASoC: ti: Add udma-pcm platform driver for UDMA
Platform driver glue for platforms using UDMA (am654 and j721e). Signed-off-by: Peter Ujfalusi <peter.ujfalusi@ti.com> Link: https://lore.kernel.org/r/20200210140950.11090-2-peter.ujfalusi@ti.com Signed-off-by: Mark Brown <broonie@kernel.org>
-rw-r--r--sound/soc/ti/Kconfig4
-rw-r--r--sound/soc/ti/Makefile2
-rw-r--r--sound/soc/ti/udma-pcm.c43
-rw-r--r--sound/soc/ti/udma-pcm.h18
4 files changed, 67 insertions, 0 deletions
diff --git a/sound/soc/ti/Kconfig b/sound/soc/ti/Kconfig
index 29f61053ab62..bf85a160a523 100644
--- a/sound/soc/ti/Kconfig
+++ b/sound/soc/ti/Kconfig
@@ -10,6 +10,10 @@ config SND_SOC_TI_SDMA_PCM
tristate
select SND_SOC_GENERIC_DMAENGINE_PCM
+config SND_SOC_TI_UDMA_PCM
+ tristate
+ select SND_SOC_GENERIC_DMAENGINE_PCM
+
comment "Texas Instruments DAI support for:"
config SND_SOC_DAVINCI_ASP
tristate "daVinci Audio Serial Port (ASP) or McBSP support"
diff --git a/sound/soc/ti/Makefile b/sound/soc/ti/Makefile
index 08c44d56ef3e..ea48c6679cc7 100644
--- a/sound/soc/ti/Makefile
+++ b/sound/soc/ti/Makefile
@@ -3,9 +3,11 @@
# Platform drivers
snd-soc-ti-edma-objs := edma-pcm.o
snd-soc-ti-sdma-objs := sdma-pcm.o
+snd-soc-ti-udma-objs := udma-pcm.o
obj-$(CONFIG_SND_SOC_TI_EDMA_PCM) += snd-soc-ti-edma.o
obj-$(CONFIG_SND_SOC_TI_SDMA_PCM) += snd-soc-ti-sdma.o
+obj-$(CONFIG_SND_SOC_TI_UDMA_PCM) += snd-soc-ti-udma.o
# CPU DAI drivers
snd-soc-davinci-asp-objs := davinci-i2s.o
diff --git a/sound/soc/ti/udma-pcm.c b/sound/soc/ti/udma-pcm.c
new file mode 100644
index 000000000000..39830caaaf7c
--- /dev/null
+++ b/sound/soc/ti/udma-pcm.c
@@ -0,0 +1,43 @@
+// SPDX-License-Identifier: GPL-2.0
+/*
+ * Copyright (C) 2020 Texas Instruments Incorporated - http://www.ti.com
+ * Author: Peter Ujfalusi <peter.ujfalusi@ti.com>
+ */
+
+#include <linux/module.h>
+#include <sound/core.h>
+#include <sound/pcm.h>
+#include <sound/pcm_params.h>
+#include <sound/soc.h>
+#include <sound/dmaengine_pcm.h>
+
+#include "udma-pcm.h"
+
+static const struct snd_pcm_hardware udma_pcm_hardware = {
+ .info = SNDRV_PCM_INFO_MMAP |
+ SNDRV_PCM_INFO_MMAP_VALID |
+ SNDRV_PCM_INFO_PAUSE | SNDRV_PCM_INFO_RESUME |
+ SNDRV_PCM_INFO_NO_PERIOD_WAKEUP |
+ SNDRV_PCM_INFO_INTERLEAVED,
+ .buffer_bytes_max = SIZE_MAX,
+ .period_bytes_min = 32,
+ .period_bytes_max = SZ_64K,
+ .periods_min = 2,
+ .periods_max = UINT_MAX,
+};
+
+static const struct snd_dmaengine_pcm_config udma_dmaengine_pcm_config = {
+ .pcm_hardware = &udma_pcm_hardware,
+ .prepare_slave_config = snd_dmaengine_pcm_prepare_slave_config,
+};
+
+int udma_pcm_platform_register(struct device *dev)
+{
+ return devm_snd_dmaengine_pcm_register(dev, &udma_dmaengine_pcm_config,
+ 0);
+}
+EXPORT_SYMBOL_GPL(udma_pcm_platform_register);
+
+MODULE_AUTHOR("Peter Ujfalusi <peter.ujfalusi@ti.com>");
+MODULE_DESCRIPTION("UDMA PCM ASoC platform driver");
+MODULE_LICENSE("GPL v2");
diff --git a/sound/soc/ti/udma-pcm.h b/sound/soc/ti/udma-pcm.h
new file mode 100644
index 000000000000..54111e7312c1
--- /dev/null
+++ b/sound/soc/ti/udma-pcm.h
@@ -0,0 +1,18 @@
+/* SPDX-License-Identifier: GPL-2.0 */
+/*
+ * Copyright (C) 2018 Texas Instruments Incorporated - http://www.ti.com
+ */
+
+#ifndef __UDMA_PCM_H__
+#define __UDMA_PCM_H__
+
+#if IS_ENABLED(CONFIG_SND_SOC_TI_UDMA_PCM)
+int udma_pcm_platform_register(struct device *dev);
+#else
+static inline int udma_pcm_platform_register(struct device *dev)
+{
+ return 0;
+}
+#endif /* CONFIG_SND_SOC_TI_UDMA_PCM */
+
+#endif /* __UDMA_PCM_H__ */