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Diffstat (limited to 'include/linux/dma/imx-dma.h')
| -rw-r--r-- | include/linux/dma/imx-dma.h | 101 |
1 files changed, 101 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..f487a4fa103a --- /dev/null +++ b/include/linux/dma/imx-dma.h @@ -0,0 +1,101 @@ +/* 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 + * @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 */ |