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/*
* linux/arch/arm/plat-mxc/include/mach/dma-mx1-mx2.h
*
* i.MX DMA registration and IRQ dispatching
*
* Copyright 2006 Pavel Pisa <pisa@cmp.felk.cvut.cz>
* Copyright 2008 Juergen Beisert, <kernel@pengutronix.de>
* Copyright 2008 Sascha Hauer, <s.hauer@pengutronix.de>
*
* 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., 51 Franklin Street, Fifth Floor, Boston,
* MA 02110-1301, USA.
*/
#ifndef __ASM_ARCH_MXC_DMA_H
#define __ASM_ARCH_MXC_DMA_H
#define IMX_DMA_CHANNELS 16
#define DMA_MODE_READ 0
#define DMA_MODE_WRITE 1
#define DMA_MODE_MASK 1
#define DMA_BASE IO_ADDRESS(DMA_BASE_ADDR)
#define IMX_DMA_MEMSIZE_32 (0 << 4)
#define IMX_DMA_MEMSIZE_8 (1 << 4)
#define IMX_DMA_MEMSIZE_16 (2 << 4)
#define IMX_DMA_TYPE_LINEAR (0 << 10)
#define IMX_DMA_TYPE_2D (1 << 10)
#define IMX_DMA_TYPE_FIFO (2 << 10)
#define IMX_DMA_ERR_BURST (1 << 0)
#define IMX_DMA_ERR_REQUEST (1 << 1)
#define IMX_DMA_ERR_TRANSFER (1 << 2)
#define IMX_DMA_ERR_BUFFER (1 << 3)
#define IMX_DMA_ERR_TIMEOUT (1 << 4)
int
imx_dma_config_channel(int channel, unsigned int config_port,
unsigned int config_mem, unsigned int dmareq, int hw_chaining);
void
imx_dma_config_burstlen(int channel, unsigned int burstlen);
int
imx_dma_setup_single(int channel, dma_addr_t dma_address,
unsigned int dma_length, unsigned int dev_addr,
unsigned int dmamode);
/*
* Use this flag as the dma_length argument to imx_dma_setup_sg()
* to create an endless running dma loop. The end of the scatterlist
* must be linked to the beginning for this to work.
*/
#define IMX_DMA_LENGTH_LOOP ((unsigned int)-1)
int
imx_dma_setup_sg(int channel, struct scatterlist *sg,
unsigned int sgcount, unsigned int dma_length,
unsigned int dev_addr, unsigned int dmamode);
int
imx_dma_setup_handlers(int channel,
void (*irq_handler) (int, void *),
void (*err_handler) (int, void *, int), void *data);
int
imx_dma_setup_progression_handler(int channel,
void (*prog_handler) (int, void*, struct scatterlist*));
void imx_dma_enable(int channel);
void imx_dma_disable(int channel);
int imx_dma_request(int channel, const char *name);
void imx_dma_free(int channel);
enum imx_dma_prio {
DMA_PRIO_HIGH = 0,
DMA_PRIO_MEDIUM = 1,
DMA_PRIO_LOW = 2
};
int imx_dma_request_by_prio(const char *name, enum imx_dma_prio prio);
#endif /* _ASM_ARCH_MXC_DMA_H */
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