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2f757f2ab7
Rather than having the central DMA multiplexer call the architecture specific DMA initialization function, have each architecture DMA initialization function use core_initcall(), and register each DMA channel separately with the multiplexer. This removes the array of dma structures in the central multiplexer, replacing it with an array of pointers instead; this is more flexible since it allows the drivers to wrap the DMA structure (eventually allowing us to transition non-ISA DMA drivers away.) Signed-off-by: Russell King <rmk+kernel@arm.linux.org.uk>
56 lines
1.1 KiB
C
56 lines
1.1 KiB
C
/*
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* linux/arch/arm/kernel/dma-ebsa285.c
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*
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* Copyright (C) 1998 Phil Blundell
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*
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* DMA functions specific to EBSA-285/CATS architectures
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*
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* Changelog:
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* 09-Nov-1998 RMK Split out ISA DMA functions to dma-isa.c
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* 17-Mar-1999 RMK Allow any EBSA285-like architecture to have
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* ISA DMA controllers.
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*/
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#include <linux/init.h>
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#include <linux/io.h>
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#include <asm/dma.h>
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#include <asm/scatterlist.h>
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#include <asm/mach/dma.h>
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#include <asm/hardware/dec21285.h>
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#if 0
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static int fb_dma_request(unsigned int chan, dma_t *dma)
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{
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return -EINVAL;
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}
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static void fb_dma_enable(unsigned int chan, dma_t *dma)
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{
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}
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static void fb_dma_disable(unsigned int chan, dma_t *dma)
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{
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}
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static struct dma_ops fb_dma_ops = {
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.type = "fb",
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.request = fb_dma_request,
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.enable = fb_dma_enable,
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.disable = fb_dma_disable,
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};
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#endif
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static int __init fb_dma_init(void)
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{
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#if 0
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dma[_DC21285_DMA(0)].d_ops = &fb_dma_ops;
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dma[_DC21285_DMA(1)].d_ops = &fb_dma_ops;
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#endif
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#ifdef CONFIG_ISA_DMA
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if (footbridge_cfn_mode())
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isa_init_dma();
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#endif
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return 0;
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}
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core_initcall(fb_dma_init);
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