summaryrefslogtreecommitdiff
path: root/include/linux/dma/imx-dma.h
blob: 8887762360d40c8d3a03da9e4f4e72c07124cbc4 (plain)
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
75
76
77
78
79
80
81
82
83
84
85
86
87
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 */