linux-imx

/* SPDX-License-Identifier: GPL-2.0+ */

/*

 * Copyright 2013-2014 Freescale Semiconductor, Inc.

 * Copyright 2018 Angelo Dureghello <angelo@sysam.it>

 */

#ifndef _FSL_EDMA_COMMON_H_

#define _FSL_EDMA_COMMON_H_

​

#include <linux/dma-direction.h>

#include "virt-dma.h"

​

#define EDMA_CR_EDBG        BIT(1)

#define EDMA_CR_ERCA        BIT(2)

#define EDMA_CR_ERGA        BIT(3)

#define EDMA_CR_HOE     BIT(4)

#define EDMA_CR_HALT        BIT(5)

#define EDMA_CR_CLM     BIT(6)

#define EDMA_CR_EMLM        BIT(7)

#define EDMA_CR_ECX     BIT(16)

#define EDMA_CR_CX      BIT(17)

​

#define EDMA_SEEI_SEEI(x)   ((x) & GENMASK(4, 0))

#define EDMA_CEEI_CEEI(x)   ((x) & GENMASK(4, 0))

#define EDMA_CINT_CINT(x)   ((x) & GENMASK(4, 0))

#define EDMA_CERR_CERR(x)   ((x) & GENMASK(4, 0))

​

#define EDMA_TCD_ATTR_DSIZE(x)      (((x) & GENMASK(2, 0)))

#define EDMA_TCD_ATTR_DMOD(x)       (((x) & GENMASK(4, 0)) << 3)

#define EDMA_TCD_ATTR_SSIZE(x)      (((x) & GENMASK(2, 0)) << 8)

#define EDMA_TCD_ATTR_SMOD(x)       (((x) & GENMASK(4, 0)) << 11)

#define EDMA_TCD_ATTR_DSIZE_8BIT    0

#define EDMA_TCD_ATTR_DSIZE_16BIT   BIT(0)

#define EDMA_TCD_ATTR_DSIZE_32BIT   BIT(1)

#define EDMA_TCD_ATTR_DSIZE_64BIT   (BIT(0) | BIT(1))

#define EDMA_TCD_ATTR_DSIZE_32BYTE  (BIT(3) | BIT(0))

#define EDMA_TCD_ATTR_SSIZE_8BIT    0

#define EDMA_TCD_ATTR_SSIZE_16BIT   (EDMA_TCD_ATTR_DSIZE_16BIT << 8)

#define EDMA_TCD_ATTR_SSIZE_32BIT   (EDMA_TCD_ATTR_DSIZE_32BIT << 8)

#define EDMA_TCD_ATTR_SSIZE_64BIT   (EDMA_TCD_ATTR_DSIZE_64BIT << 8)

#define EDMA_TCD_ATTR_SSIZE_32BYTE  (EDMA_TCD_ATTR_DSIZE_32BYTE << 8)

​

#define EDMA_TCD_CITER_CITER(x)     ((x) & GENMASK(14, 0))

#define EDMA_TCD_BITER_BITER(x)     ((x) & GENMASK(14, 0))

​

#define EDMA_TCD_CSR_START      BIT(0)

#define EDMA_TCD_CSR_INT_MAJOR      BIT(1)

#define EDMA_TCD_CSR_INT_HALF       BIT(2)

#define EDMA_TCD_CSR_D_REQ      BIT(3)

#define EDMA_TCD_CSR_E_SG       BIT(4)

#define EDMA_TCD_CSR_E_LINK     BIT(5)

#define EDMA_TCD_CSR_ACTIVE     BIT(6)

#define EDMA_TCD_CSR_DONE       BIT(7)

​

#define EDMAMUX_CHCFG_DIS       0x0

#define EDMAMUX_CHCFG_ENBL      0x80

#define EDMAMUX_CHCFG_SOURCE(n)     ((n) & 0x3F)

​

#define DMAMUX_NR   2

​

#define FSL_EDMA_BUSWIDTHS  (BIT(DMA_SLAVE_BUSWIDTH_1_BYTE) | \

                 BIT(DMA_SLAVE_BUSWIDTH_2_BYTES) | \

                 BIT(DMA_SLAVE_BUSWIDTH_4_BYTES) | \

                 BIT(DMA_SLAVE_BUSWIDTH_8_BYTES))

enum fsl_edma_pm_state {

    RUNNING = 0,

    SUSPENDED,

};

​

struct fsl_edma_hw_tcd {

    __le32  saddr;

    __le16  soff;

    __le16  attr;

    __le32  nbytes;

    __le32  slast;

    __le32  daddr;

    __le16  doff;

    __le16  citer;

    __le32  dlast_sga;

    __le16  csr;

    __le16  biter;

};

​

/*

 * These are iomem pointers, for both v32 and v64.

 */

struct edma_regs {

    void __iomem *cr;

    void __iomem *es;

    void __iomem *erqh;

    void __iomem *erql; /* aka erq on v32 */

    void __iomem *eeih;

    void __iomem *eeil; /* aka eei on v32 */