path: root/drivers/dma/nbpfaxi.c

/*
 * Copyright (C) 2013-2014 Renesas Electronics Europe Ltd.
 * Author: Guennadi Liakhovetski <g.liakhovetski@gmx.de>
 *
 * This program is free software; you can redistribute it and/or modify
 * it under the terms of version 2 of the GNU General Public License as
 * published by the Free Software Foundation.
 */

#include <linux/bitmap.h>
#include <linux/bitops.h>
#include <linux/clk.h>
#include <linux/dma-mapping.h>
#include <linux/dmaengine.h>
#include <linux/err.h>
#include <linux/interrupt.h>
#include <linux/io.h>
#include <linux/log2.h>
#include <linux/module.h>
#include <linux/of.h>
#include <linux/of_device.h>
#include <linux/of_dma.h>
#include <linux/platform_device.h>
#include <linux/slab.h>

#include <dt-bindings/dma/nbpfaxi.h>

#include "dmaengine.h"

#define NBPF_REG_CHAN_OFFSET	0
#define NBPF_REG_CHAN_SIZE	0x40

/* Channel Current Transaction Byte register */
#define NBPF_CHAN_CUR_TR_BYTE	0x20

/* Channel Status register */
#define NBPF_CHAN_STAT	0x24
#define NBPF_CHAN_STAT_EN	1
#define NBPF_CHAN_STAT_TACT	4
#define NBPF_CHAN_STAT_ERR	0x10
#define NBPF_CHAN_STAT_END	0x20
#define NBPF_CHAN_STAT_TC	0x40
#define NBPF_CHAN_STAT_DER	0x400

/* Channel Control register */
#define NBPF_CHAN_CTRL	0x28
#define NBPF_CHAN_CTRL_SETEN	1