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>

diff --git a/sound/soc/ti/Kconfig b/sound/soc/ti/Kconfig
index 29f6105..bf85a16 100644 (file)
--- 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 08c44d5..ea48c66 100644 (file)
--- 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 (file)
index 0000000..39830ca
--- /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 (file)
index 0000000..54111e7
--- /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__ */