mirror of
https://github.com/edk2-porting/linux-next.git
synced 2024-12-29 15:43:59 +08:00
308d333ad6
There's no point these being in a generic include file when they're only used in arch/arm/mach-rpc/dma.c. Signed-off-by: Russell King <rmk+kernel@arm.linux.org.uk>
55 lines
1.6 KiB
C
55 lines
1.6 KiB
C
/*
|
|
* arch/arm/include/asm/mach/dma.h
|
|
*
|
|
* Copyright (C) 1998-2000 Russell King
|
|
*
|
|
* This program is free software; you can redistribute it and/or modify
|
|
* it under the terms of the GNU General Public License version 2 as
|
|
* published by the Free Software Foundation.
|
|
*
|
|
* This header file describes the interface between the generic DMA handler
|
|
* (dma.c) and the architecture-specific DMA backends (dma-*.c)
|
|
*/
|
|
|
|
struct dma_struct;
|
|
typedef struct dma_struct dma_t;
|
|
|
|
struct dma_ops {
|
|
int (*request)(unsigned int, dma_t *); /* optional */
|
|
void (*free)(unsigned int, dma_t *); /* optional */
|
|
void (*enable)(unsigned int, dma_t *); /* mandatory */
|
|
void (*disable)(unsigned int, dma_t *); /* mandatory */
|
|
int (*residue)(unsigned int, dma_t *); /* optional */
|
|
int (*setspeed)(unsigned int, dma_t *, int); /* optional */
|
|
const char *type;
|
|
};
|
|
|
|
struct dma_struct {
|
|
void *addr; /* single DMA address */
|
|
unsigned long count; /* single DMA size */
|
|
struct scatterlist buf; /* single DMA */
|
|
int sgcount; /* number of DMA SG */
|
|
struct scatterlist *sg; /* DMA Scatter-Gather List */
|
|
|
|
unsigned int active:1; /* Transfer active */
|
|
unsigned int invalid:1; /* Address/Count changed */
|
|
|
|
unsigned int dma_mode; /* DMA mode */
|
|
int speed; /* DMA speed */
|
|
|
|
unsigned int lock; /* Device is allocated */
|
|
const char *device_id; /* Device name */
|
|
|
|
const struct dma_ops *d_ops;
|
|
};
|
|
|
|
/*
|
|
* isa_dma_add - add an ISA-style DMA channel
|
|
*/
|
|
extern int isa_dma_add(unsigned int, dma_t *dma);
|
|
|
|
/*
|
|
* Add the ISA DMA controller. Always takes channels 0-7.
|
|
*/
|
|
extern void isa_init_dma(void);
|