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/* SPDX-License-Identifier: GPL-2.0 */
/*
* Copyright 2002 Integrated Device Technology, Inc.
* All rights reserved.
*
* DMA register definition.
*
* Author : ryan.holmQVist@idt.com
* Date : 20011005
*/
#ifndef __ASM_RC32434_DMA_H
#define __ASM_RC32434_DMA_H
#include <asm/mach-rc32434/rb.h>
#define DMA0_BASE_ADDR 0x18040000
/*
* DMA descriptor (in physical memory).
*/
struct dma_desc {
u32 control; /* Control. use DMAD_* */
u32 ca; /* Current Address. */
u32 devcs; /* Device control and status. */
u32 link; /* Next descriptor in chain. */
};
#define DMA_DESC_SIZ sizeof(struct dma_desc)
#define DMA_DESC_COUNT_BIT 0
#define DMA_DESC_COUNT_MSK 0x0003ffff
#define DMA_DESC_DS_BIT 20
#define DMA_DESC_DS_MSK 0x00300000
#define DMA_DESC_DEV_CMD_BIT 22
#define DMA_DESC_DEV_CMD_MSK 0x01c00000
/* DMA command sizes */
#define DMA_DESC_DEV_CMD_BYTE 0
#define DMA_DESC_DEV_CMD_HLF_WD 1
#define DMA_DESC_DEV_CMD_WORD 2
#define DMA_DESC_DEV_CMD_2WORDS 3
#define DMA_DESC_DEV_CMD_4WORDS 4
#define DMA_DESC_DEV_CMD_6WORDS 5
#define DMA_DESC_DEV_CMD_8WORDS 6
#define DMA_DESC_DEV_CMD_16WORDS 7
/* DMA descriptors interrupts */
#define DMA_DESC_COF (1 << 25) /* Chain on finished */
#define DMA_DESC_COD (1 << 26) /* Chain on done */
#define DMA_DESC_IOF (1 << 27) /* Interrupt on finished */
#define DMA_DESC_IOD (1 << 28) /* Interrupt on done */
#define DMA_DESC_TERM (1 << 29) /* Terminated */
#define DMA_DESC_DONE (1 << 30) /* Done */
#define DMA_DESC_FINI (1 << 31) /* Finished */
/*
* DMA register (within Internal Register Map).
*/
struct dma_reg {
u32 dmac; /* Control. */
u32 dmas; /* Status. */
u32 dmasm; /* Mask. */
u32 dmadptr; /* Descriptor pointer. */
u32 dmandptr; /* Next descriptor pointer. */
};
/* DMA channels specific registers */
#define DMA_CHAN_RUN_BIT (1 << 0)
#define DMA_CHAN_DONE_BIT (1 << 1)
#define DMA_CHAN_MODE_BIT (1 << 2)
#define DMA_CHAN_MODE_MSK 0x0000000c
#define DMA_CHAN_MODE_AUTO 0
#define DMA_CHAN_MODE_BURST 1
#define DMA_CHAN_MODE_XFRT 2
#define DMA_CHAN_MODE_RSVD 3
#define DMA_CHAN_ACT_BIT (1 << 4)
/* DMA status registers */
#define DMA_STAT_FINI (1 << 0)
#define DMA_STAT_DONE (1 << 1)
#define DMA_STAT_CHAIN (1 << 2)
#define DMA_STAT_ERR (1 << 3)
#define DMA_STAT_HALT (1 << 4)
/*
* DMA channel definitions
*/
#define DMA_CHAN_ETH_RCV 0
#define DMA_CHAN_ETH_XMT 1
#define DMA_CHAN_MEM_TO_FIFO 2
#define DMA_CHAN_FIFO_TO_MEM 3
#define DMA_CHAN_PCI_TO_MEM 4
#define DMA_CHAN_MEM_TO_PCI 5
#define DMA_CHAN_COUNT 6
struct dma_channel {
struct dma_reg ch[DMA_CHAN_COUNT];
};
#endif /* __ASM_RC32434_DMA_H */