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/* 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 */
IMX_DMATYPE_HDMI, /* HDMI 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
* @stride_fifos_src: FIFO address stride for recording, 0 means all FIFOs are
* continuous, 1 means 1 word stride between FIFOs. All stride
* between FIFOs should be same.
* @stride_fifos_dst: FIFO address stride for playback
* @words_per_fifo: numbers of words per FIFO fetch/fill, 1 means
* one channel per FIFO, 2 means 2 channels per FIFO..
* If 'n_fifos_src = 4' and 'words_per_fifo = 2', it
* means the first two words(channels) fetch from FIFO0
* and then jump to FIFO1 for next two words, and so on
* after the last FIFO3 fetched, roll back to FIFO0.
* @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;
int stride_fifos_src;
int stride_fifos_dst;
int words_per_fifo;
bool sw_done;
};
#endif /* __LINUX_DMA_IMX_H */
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