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-rw-r--r--include/linux/dma/imx-dma.h88
1 files changed, 88 insertions, 0 deletions
diff --git a/include/linux/dma/imx-dma.h b/include/linux/dma/imx-dma.h
new file mode 100644
index 000000000000..8887762360d4
--- /dev/null
+++ b/include/linux/dma/imx-dma.h
@@ -0,0 +1,88 @@
+/* SPDX-License-Identifier: GPL-2.0-only */
+/*
+ * Copyright 2004-2009 Freescale Semiconductor, Inc. All Rights Reserved.
+ */
+
+#ifndef __LINUX_DMA_IMX_H
+#define __LINUX_DMA_IMX_H
+
+#include <linux/scatterlist.h>
+#include <linux/device.h>
+#include <linux/dmaengine.h>
+
+/*
+ * This enumerates peripheral types. Used for SDMA.
+ */
+enum sdma_peripheral_type {
+ IMX_DMATYPE_SSI, /* MCU domain SSI */
+ IMX_DMATYPE_SSI_SP, /* Shared SSI */
+ IMX_DMATYPE_MMC, /* MMC */
+ IMX_DMATYPE_SDHC, /* SDHC */
+ IMX_DMATYPE_UART, /* MCU domain UART */
+ IMX_DMATYPE_UART_SP, /* Shared UART */
+ IMX_DMATYPE_FIRI, /* FIRI */
+ IMX_DMATYPE_CSPI, /* MCU domain CSPI */
+ IMX_DMATYPE_CSPI_SP, /* Shared CSPI */
+ IMX_DMATYPE_SIM, /* SIM */
+ IMX_DMATYPE_ATA, /* ATA */
+ IMX_DMATYPE_CCM, /* CCM */
+ IMX_DMATYPE_EXT, /* External peripheral */
+ IMX_DMATYPE_MSHC, /* Memory Stick Host Controller */
+ IMX_DMATYPE_MSHC_SP, /* Shared Memory Stick Host Controller */
+ IMX_DMATYPE_DSP, /* DSP */
+ IMX_DMATYPE_MEMORY, /* Memory */
+ IMX_DMATYPE_FIFO_MEMORY,/* FIFO type Memory */
+ IMX_DMATYPE_SPDIF, /* SPDIF */
+ IMX_DMATYPE_IPU_MEMORY, /* IPU Memory */
+ IMX_DMATYPE_ASRC, /* ASRC */
+ IMX_DMATYPE_ESAI, /* ESAI */
+ IMX_DMATYPE_SSI_DUAL, /* SSI Dual FIFO */
+ IMX_DMATYPE_ASRC_SP, /* Shared ASRC */
+ IMX_DMATYPE_SAI, /* SAI */
+ IMX_DMATYPE_MULTI_SAI, /* MULTI FIFOs For Audio */
+};
+
+enum imx_dma_prio {
+ DMA_PRIO_HIGH = 0,
+ DMA_PRIO_MEDIUM = 1,
+ DMA_PRIO_LOW = 2
+};
+
+struct imx_dma_data {
+ int dma_request; /* DMA request line */
+ int dma_request2; /* secondary DMA request line */
+ enum sdma_peripheral_type peripheral_type;
+ int priority;
+};
+
+static inline int imx_dma_is_ipu(struct dma_chan *chan)
+{
+ return !strcmp(dev_name(chan->device->dev), "ipu-core");
+}
+
+static inline int imx_dma_is_general_purpose(struct dma_chan *chan)
+{
+ return !strcmp(chan->device->dev->driver->name, "imx-sdma") ||
+ !strcmp(chan->device->dev->driver->name, "imx-dma");
+}
+
+/**
+ * struct sdma_peripheral_config - SDMA config for audio
+ * @n_fifos_src: Number of FIFOs for recording
+ * @n_fifos_dst: Number of FIFOs for playback
+ * @sw_done: Use software done. Needed for PDM (micfil)
+ *
+ * Some i.MX Audio devices (SAI, micfil) have multiple successive FIFO
+ * registers. For multichannel recording/playback the SAI/micfil have
+ * one FIFO register per channel and the SDMA engine has to read/write
+ * the next channel from/to the next register and wrap around to the
+ * first register when all channels are handled. The number of active
+ * channels must be communicated to the SDMA engine using this struct.
+ */
+struct sdma_peripheral_config {
+ int n_fifos_src;
+ int n_fifos_dst;
+ bool sw_done;
+};
+
+#endif /* __LINUX_DMA_IMX_H */