a09e64fbc0
This just leaves include/asm-arm/plat-* to deal with. Signed-off-by: Russell King <rmk+kernel@arm.linux.org.uk>
94 lines
3 KiB
C
94 lines
3 KiB
C
/*
|
|
* linux/include/asm-arm/imxads/dma.h
|
|
*
|
|
* Copyright (C) 1997,1998 Russell King
|
|
*
|
|
* This program is free software; you can redistribute it and/or modify
|
|
* it under the terms of the GNU General Public License as published by
|
|
* the Free Software Foundation; either version 2 of the License, or
|
|
* (at your option) any later version.
|
|
*
|
|
* This program is distributed in the hope that it will be useful,
|
|
* but WITHOUT ANY WARRANTY; without even the implied warranty of
|
|
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
|
|
* GNU General Public License for more details.
|
|
*
|
|
* You should have received a copy of the GNU General Public License
|
|
* along with this program; if not, write to the Free Software
|
|
* Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA
|
|
*/
|
|
|
|
#include <asm/dma.h>
|
|
|
|
#ifndef __ASM_ARCH_IMX_DMA_H
|
|
#define __ASM_ARCH_IMX_DMA_H
|
|
|
|
#define IMX_DMA_CHANNELS 11
|
|
|
|
/*
|
|
* struct imx_dma_channel - i.MX specific DMA extension
|
|
* @name: name specified by DMA client
|
|
* @irq_handler: client callback for end of transfer
|
|
* @err_handler: client callback for error condition
|
|
* @data: clients context data for callbacks
|
|
* @dma_mode: direction of the transfer %DMA_MODE_READ or %DMA_MODE_WRITE
|
|
* @sg: pointer to the actual read/written chunk for scatter-gather emulation
|
|
* @sgbc: counter of processed bytes in the actual read/written chunk
|
|
* @resbytes: total residual number of bytes to transfer
|
|
* (it can be lower or same as sum of SG mapped chunk sizes)
|
|
* @sgcount: number of chunks to be read/written
|
|
*
|
|
* Structure is used for IMX DMA processing. It would be probably good
|
|
* @struct dma_struct in the future for external interfacing and use
|
|
* @struct imx_dma_channel only as extension to it.
|
|
*/
|
|
|
|
struct imx_dma_channel {
|
|
const char *name;
|
|
void (*irq_handler) (int, void *);
|
|
void (*err_handler) (int, void *, int errcode);
|
|
void *data;
|
|
dmamode_t dma_mode;
|
|
struct scatterlist *sg;
|
|
unsigned int sgbc;
|
|
unsigned int sgcount;
|
|
unsigned int resbytes;
|
|
int dma_num;
|
|
};
|
|
|
|
extern struct imx_dma_channel imx_dma_channels[IMX_DMA_CHANNELS];
|
|
|
|
#define IMX_DMA_ERR_BURST 1
|
|
#define IMX_DMA_ERR_REQUEST 2
|
|
#define IMX_DMA_ERR_TRANSFER 4
|
|
#define IMX_DMA_ERR_BUFFER 8
|
|
|
|
/* The type to distinguish channel numbers parameter from ordinal int type */
|
|
typedef int imx_dmach_t;
|
|
|
|
int
|
|
imx_dma_setup_single(imx_dmach_t dma_ch, dma_addr_t dma_address,
|
|
unsigned int dma_length, unsigned int dev_addr, dmamode_t dmamode);
|
|
|
|
int
|
|
imx_dma_setup_sg(imx_dmach_t dma_ch,
|
|
struct scatterlist *sg, unsigned int sgcount, unsigned int dma_length,
|
|
unsigned int dev_addr, dmamode_t dmamode);
|
|
|
|
int
|
|
imx_dma_setup_handlers(imx_dmach_t dma_ch,
|
|
void (*irq_handler) (int, void *),
|
|
void (*err_handler) (int, void *, int), void *data);
|
|
|
|
void imx_dma_enable(imx_dmach_t dma_ch);
|
|
|
|
void imx_dma_disable(imx_dmach_t dma_ch);
|
|
|
|
int imx_dma_request(imx_dmach_t dma_ch, const char *name);
|
|
|
|
void imx_dma_free(imx_dmach_t dma_ch);
|
|
|
|
imx_dmach_t imx_dma_request_by_prio(const char *name, imx_dma_prio prio);
|
|
|
|
|
|
#endif /* _ASM_ARCH_IMX_DMA_H */
|