7cdad48297
The old __address element in struct scatterlist remained from older kernels because the ARM DMA emulation code made use of it. Move this field into struct dma_struct, and convert DMA emulation code to setup a SG entry as required. Also, convert DMA emulation code to use the new DMA API rather than the PCI DMA API. Signed-off-by: Russell King <rmk+kernel@arm.linux.org.uk>
58 lines
1.7 KiB
C
58 lines
1.7 KiB
C
/*
|
|
* linux/include/asm-arm/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)(dmach_t, dma_t *); /* optional */
|
|
void (*free)(dmach_t, dma_t *); /* optional */
|
|
void (*enable)(dmach_t, dma_t *); /* mandatory */
|
|
void (*disable)(dmach_t, dma_t *); /* mandatory */
|
|
int (*residue)(dmach_t, dma_t *); /* optional */
|
|
int (*setspeed)(dmach_t, dma_t *, int); /* optional */
|
|
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 */
|
|
|
|
dmamode_t dma_mode; /* DMA mode */
|
|
int speed; /* DMA speed */
|
|
|
|
unsigned int lock; /* Device is allocated */
|
|
const char *device_id; /* Device name */
|
|
|
|
unsigned int dma_base; /* Controller base address */
|
|
int dma_irq; /* Controller IRQ */
|
|
struct scatterlist cur_sg; /* Current controller buffer */
|
|
unsigned int state;
|
|
|
|
struct dma_ops *d_ops;
|
|
};
|
|
|
|
/* Prototype: void arch_dma_init(dma)
|
|
* Purpose : Initialise architecture specific DMA
|
|
* Params : dma - pointer to array of DMA structures
|
|
*/
|
|
extern void arch_dma_init(dma_t *dma);
|
|
|
|
extern void isa_init_dma(dma_t *dma);
|