1 /* SPDX-License-Identifier: GPL-2.0-only */
2 /*
3 * Copyright 2004-2009 Freescale Semiconductor, Inc. All Rights Reserved.
4 */
5
6 #ifndef __LINUX_DMA_IMX_H
7 #define __LINUX_DMA_IMX_H
8
9 #include <linux/scatterlist.h>
10 #include <linux/device.h>
11 #include <linux/dmaengine.h>
12
13 /*
14 * This enumerates peripheral types. Used for SDMA.
15 */
16 enum sdma_peripheral_type {
17 IMX_DMATYPE_SSI, /* MCU domain SSI */
18 IMX_DMATYPE_SSI_SP, /* Shared SSI */
19 IMX_DMATYPE_MMC, /* MMC */
20 IMX_DMATYPE_SDHC, /* SDHC */
21 IMX_DMATYPE_UART, /* MCU domain UART */
22 IMX_DMATYPE_UART_SP, /* Shared UART */
23 IMX_DMATYPE_FIRI, /* FIRI */
24 IMX_DMATYPE_CSPI, /* MCU domain CSPI */
25 IMX_DMATYPE_CSPI_SP, /* Shared CSPI */
26 IMX_DMATYPE_SIM, /* SIM */
27 IMX_DMATYPE_ATA, /* ATA */
28 IMX_DMATYPE_CCM, /* CCM */
29 IMX_DMATYPE_EXT, /* External peripheral */
30 IMX_DMATYPE_MSHC, /* Memory Stick Host Controller */
31 IMX_DMATYPE_MSHC_SP, /* Shared Memory Stick Host Controller */
32 IMX_DMATYPE_DSP, /* DSP */
33 IMX_DMATYPE_MEMORY, /* Memory */
34 IMX_DMATYPE_FIFO_MEMORY,/* FIFO type Memory */
35 IMX_DMATYPE_SPDIF, /* SPDIF */
36 IMX_DMATYPE_IPU_MEMORY, /* IPU Memory */
37 IMX_DMATYPE_ASRC, /* ASRC */
38 IMX_DMATYPE_ESAI, /* ESAI */
39 IMX_DMATYPE_SSI_DUAL, /* SSI Dual FIFO */
40 IMX_DMATYPE_ASRC_SP, /* Shared ASRC */
41 IMX_DMATYPE_SAI, /* SAI */
42 IMX_DMATYPE_MULTI_SAI, /* MULTI FIFOs For Audio */
43 };
44
45 enum imx_dma_prio {
46 DMA_PRIO_HIGH = 0,
47 DMA_PRIO_MEDIUM = 1,
48 DMA_PRIO_LOW = 2
49 };
50
51 struct imx_dma_data {
52 int dma_request; /* DMA request line */
53 int dma_request2; /* secondary DMA request line */
54 enum sdma_peripheral_type peripheral_type;
55 int priority;
56 };
57
imx_dma_is_ipu(struct dma_chan * chan)58 static inline int imx_dma_is_ipu(struct dma_chan *chan)
59 {
60 return !strcmp(dev_name(chan->device->dev), "ipu-core");
61 }
62
imx_dma_is_general_purpose(struct dma_chan * chan)63 static inline int imx_dma_is_general_purpose(struct dma_chan *chan)
64 {
65 return !strcmp(chan->device->dev->driver->name, "imx-sdma") ||
66 !strcmp(chan->device->dev->driver->name, "imx-dma");
67 }
68
69 /**
70 * struct sdma_peripheral_config - SDMA config for audio
71 * @n_fifos_src: Number of FIFOs for recording
72 * @n_fifos_dst: Number of FIFOs for playback
73 * @sw_done: Use software done. Needed for PDM (micfil)
74 *
75 * Some i.MX Audio devices (SAI, micfil) have multiple successive FIFO
76 * registers. For multichannel recording/playback the SAI/micfil have
77 * one FIFO register per channel and the SDMA engine has to read/write
78 * the next channel from/to the next register and wrap around to the
79 * first register when all channels are handled. The number of active
80 * channels must be communicated to the SDMA engine using this struct.
81 */
82 struct sdma_peripheral_config {
83 int n_fifos_src;
84 int n_fifos_dst;
85 bool sw_done;
86 };
87
88 #endif /* __LINUX_DMA_IMX_H */
89