505788cccb
Allow each CPU type in the S3C24XX range to select the DMA channel mapping it supports. We change the DMA registration to use an virtual channel number that the DMA system will allocate to a hardware channel at request time. Signed-off-by: Ben Dooks <ben-linux@fluff.org> Signed-off-by: Russell King <rmk+kernel@arm.linux.org.uk>
45 lines
1.1 KiB
C
45 lines
1.1 KiB
C
/* arch/arm/mach-s3c2410/dma.h
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*
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* Copyright (C) 2006 Simtec Electronics
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* Ben Dooks <ben@simtec.co.uk>
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*
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* Samsung S3C24XX DMA support
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*
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* This program is free software; you can redistribute it and/or modify
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* it under the terms of the GNU General Public License version 2 as
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* published by the Free Software Foundation.
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*/
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extern struct sysdev_class dma_sysclass;
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extern struct s3c2410_dma_chan s3c2410_chans[S3C2410_DMA_CHANNELS];
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#define DMA_CH_VALID (1<<31)
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struct s3c24xx_dma_addr {
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unsigned long from;
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unsigned long to;
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};
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/* struct s3c24xx_dma_map
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*
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* this holds the mapping information for the channel selected
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* to be connected to the specified device
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*/
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struct s3c24xx_dma_map {
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const char *name;
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struct s3c24xx_dma_addr hw_addr;
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unsigned long channels[S3C2410_DMA_CHANNELS];
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};
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struct s3c24xx_dma_selection {
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struct s3c24xx_dma_map *map;
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unsigned long map_size;
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unsigned long dcon_mask;
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void (*select)(struct s3c2410_dma_chan *chan,
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struct s3c24xx_dma_map *map);
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};
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extern int s3c24xx_dma_init_map(struct s3c24xx_dma_selection *sel);
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