linux-imx

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

//

// Copyright (c) 2013-2014 Freescale Semiconductor, Inc

// Copyright (c) 2017 Sysam, Angelo Dureghello  <angelo@sysam.it>

​

#include <linux/dmapool.h>

#include <linux/module.h>

#include <linux/slab.h>

#include <linux/dma-mapping.h>

​

#include "fsl-edma-common.h"

​

#define EDMA_CR         0x00

#define EDMA_ES         0x04

#define EDMA_ERQ        0x0C

#define EDMA_EEI        0x14

#define EDMA_SERQ       0x1B

#define EDMA_CERQ       0x1A

#define EDMA_SEEI       0x19

#define EDMA_CEEI       0x18

#define EDMA_CINT       0x1F

#define EDMA_CERR       0x1E

#define EDMA_SSRT       0x1D

#define EDMA_CDNE       0x1C

#define EDMA_INTR       0x24

#define EDMA_ERR        0x2C

​

#define EDMA64_ERQH     0x08

#define EDMA64_EEIH     0x10

#define EDMA64_SERQ     0x18

#define EDMA64_CERQ     0x19

#define EDMA64_SEEI     0x1a

#define EDMA64_CEEI     0x1b

#define EDMA64_CINT     0x1c

#define EDMA64_CERR     0x1d

#define EDMA64_SSRT     0x1e

#define EDMA64_CDNE     0x1f

#define EDMA64_INTH     0x20

#define EDMA64_INTL     0x24

#define EDMA64_ERRH     0x28

#define EDMA64_ERRL     0x2c

​

#define EDMA_TCD        0x1000

​

static void fsl_edma_enable_request(struct fsl_edma_chan *fsl_chan)

{

    struct edma_regs *regs = &fsl_chan->edma->regs;

    u32 ch = fsl_chan->vchan.chan.chan_id;

​

    if (fsl_chan->edma->version == v1) {

        edma_writeb(fsl_chan->edma, EDMA_SEEI_SEEI(ch), regs->seei);

        edma_writeb(fsl_chan->edma, ch, regs->serq);

    } else {

        /* ColdFire is big endian, and accesses natively

         * big endian I/O peripherals

         */

        iowrite8(EDMA_SEEI_SEEI(ch), regs->seei);

        iowrite8(ch, regs->serq);

    }

}

​

void fsl_edma_disable_request(struct fsl_edma_chan *fsl_chan)

{