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101 lines
3.3 KiB
101 lines
3.3 KiB
/* SPDX-License-Identifier: GPL-2.0-only */ |
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/* |
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* Copyright 2004-2009 Freescale Semiconductor, Inc. All Rights Reserved. |
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*/ |
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#ifndef __LINUX_DMA_IMX_H |
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#define __LINUX_DMA_IMX_H |
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#include <linux/scatterlist.h> |
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#include <linux/device.h> |
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#include <linux/dmaengine.h> |
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/* |
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* This enumerates peripheral types. Used for SDMA. |
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*/ |
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enum sdma_peripheral_type { |
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IMX_DMATYPE_SSI, /* MCU domain SSI */ |
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IMX_DMATYPE_SSI_SP, /* Shared SSI */ |
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IMX_DMATYPE_MMC, /* MMC */ |
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IMX_DMATYPE_SDHC, /* SDHC */ |
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IMX_DMATYPE_UART, /* MCU domain UART */ |
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IMX_DMATYPE_UART_SP, /* Shared UART */ |
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IMX_DMATYPE_FIRI, /* FIRI */ |
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IMX_DMATYPE_CSPI, /* MCU domain CSPI */ |
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IMX_DMATYPE_CSPI_SP, /* Shared CSPI */ |
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IMX_DMATYPE_SIM, /* SIM */ |
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IMX_DMATYPE_ATA, /* ATA */ |
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IMX_DMATYPE_CCM, /* CCM */ |
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IMX_DMATYPE_EXT, /* External peripheral */ |
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IMX_DMATYPE_MSHC, /* Memory Stick Host Controller */ |
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IMX_DMATYPE_MSHC_SP, /* Shared Memory Stick Host Controller */ |
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IMX_DMATYPE_DSP, /* DSP */ |
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IMX_DMATYPE_MEMORY, /* Memory */ |
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IMX_DMATYPE_FIFO_MEMORY,/* FIFO type Memory */ |
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IMX_DMATYPE_SPDIF, /* SPDIF */ |
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IMX_DMATYPE_IPU_MEMORY, /* IPU Memory */ |
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IMX_DMATYPE_ASRC, /* ASRC */ |
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IMX_DMATYPE_ESAI, /* ESAI */ |
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IMX_DMATYPE_SSI_DUAL, /* SSI Dual FIFO */ |
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IMX_DMATYPE_ASRC_SP, /* Shared ASRC */ |
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IMX_DMATYPE_SAI, /* SAI */ |
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IMX_DMATYPE_MULTI_SAI, /* MULTI FIFOs For Audio */ |
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}; |
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enum imx_dma_prio { |
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DMA_PRIO_HIGH = 0, |
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DMA_PRIO_MEDIUM = 1, |
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DMA_PRIO_LOW = 2 |
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}; |
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struct imx_dma_data { |
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int dma_request; /* DMA request line */ |
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int dma_request2; /* secondary DMA request line */ |
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enum sdma_peripheral_type peripheral_type; |
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int priority; |
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}; |
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static inline int imx_dma_is_ipu(struct dma_chan *chan) |
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{ |
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return !strcmp(dev_name(chan->device->dev), "ipu-core"); |
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} |
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static inline int imx_dma_is_general_purpose(struct dma_chan *chan) |
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{ |
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return !strcmp(chan->device->dev->driver->name, "imx-sdma") || |
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!strcmp(chan->device->dev->driver->name, "imx-dma"); |
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} |
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/** |
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* struct sdma_peripheral_config - SDMA config for audio |
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* @n_fifos_src: Number of FIFOs for recording |
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* @n_fifos_dst: Number of FIFOs for playback |
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* @stride_fifos_src: FIFO address stride for recording, 0 means all FIFOs are |
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* continuous, 1 means 1 word stride between FIFOs. All stride |
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* between FIFOs should be same. |
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* @stride_fifos_dst: FIFO address stride for playback |
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* @words_per_fifo: numbers of words per FIFO fetch/fill, 1 means |
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* one channel per FIFO, 2 means 2 channels per FIFO.. |
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* If 'n_fifos_src = 4' and 'words_per_fifo = 2', it |
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* means the first two words(channels) fetch from FIFO0 |
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* and then jump to FIFO1 for next two words, and so on |
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* after the last FIFO3 fetched, roll back to FIFO0. |
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* @sw_done: Use software done. Needed for PDM (micfil) |
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* |
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* Some i.MX Audio devices (SAI, micfil) have multiple successive FIFO |
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* registers. For multichannel recording/playback the SAI/micfil have |
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* one FIFO register per channel and the SDMA engine has to read/write |
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* the next channel from/to the next register and wrap around to the |
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* first register when all channels are handled. The number of active |
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* channels must be communicated to the SDMA engine using this struct. |
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*/ |
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struct sdma_peripheral_config { |
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int n_fifos_src; |
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int n_fifos_dst; |
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int stride_fifos_src; |
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int stride_fifos_dst; |
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int words_per_fifo; |
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bool sw_done; |
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}; |
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#endif /* __LINUX_DMA_IMX_H */
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