/*
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/*
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* arch/arm/kernel/dma-a5k.c
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* arch/arm/kernel/dma-a5k.c
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*
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*
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* Copyright (C) 1998 Russell King
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* Copyright (C) 1998 Russell King
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*
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*
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* DMA functions specific to A5000 architecture
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* DMA functions specific to A5000 architecture
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*/
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*/
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#include <linux/sched.h>
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#include <linux/sched.h>
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#include <asm/dma.h>
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#include <asm/dma.h>
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#include <asm/io.h>
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#include <asm/io.h>
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#include <asm/hardware.h>
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#include <asm/hardware.h>
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#include <asm/pgtable.h>
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#include <asm/pgtable.h>
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#include "dma.h"
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#include "dma.h"
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int arch_request_dma(dmach_t channel, dma_t *dma, const char *devname)
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int arch_request_dma(dmach_t channel, dma_t *dma, const char *devname)
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{
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{
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if (channel == DMA_VIRTUAL_FLOPPY)
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if (channel == DMA_VIRTUAL_FLOPPY)
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return 0;
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return 0;
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else
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else
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return -EINVAL;
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return -EINVAL;
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}
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}
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void arch_free_dma(dmach_t channel, dma_t *dma)
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void arch_free_dma(dmach_t channel, dma_t *dma)
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{
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{
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if (channel != DMA_VIRTUAL_FLOPPY)
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if (channel != DMA_VIRTUAL_FLOPPY)
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printk ("arch_free_dma: invalid channel %d\n", channel);
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printk ("arch_free_dma: invalid channel %d\n", channel);
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}
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}
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int arch_get_dma_residue(dmach_t channel, dma_t *dma)
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int arch_get_dma_residue(dmach_t channel, dma_t *dma)
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{
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{
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if (channel != DMA_VIRTUAL_FLOPPY) {
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if (channel != DMA_VIRTUAL_FLOPPY) {
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printk ("arch_dma_count: invalid channel %d\n", channel);
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printk ("arch_dma_count: invalid channel %d\n", channel);
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return 0;
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return 0;
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} else {
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} else {
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extern int floppy_fiqresidual(void);
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extern int floppy_fiqresidual(void);
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return floppy_fiqresidual();
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return floppy_fiqresidual();
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}
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}
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}
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}
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void arch_enable_dma(dmach_t channel, dma_t *dma)
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void arch_enable_dma(dmach_t channel, dma_t *dma)
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{
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{
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if (channel != DMA_VIRTUAL_FLOPPY)
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if (channel != DMA_VIRTUAL_FLOPPY)
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printk ("arch_enable_dma: invalid channel %d\n", channel);
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printk ("arch_enable_dma: invalid channel %d\n", channel);
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else {
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else {
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void *fiqhandler_start;
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void *fiqhandler_start;
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unsigned int fiqhandler_length;
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unsigned int fiqhandler_length;
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extern void floppy_fiqsetup (unsigned long len, unsigned long addr,
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extern void floppy_fiqsetup (unsigned long len, unsigned long addr,
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unsigned long port);
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unsigned long port);
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if (dma->dma_mode == DMA_MODE_READ) {
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if (dma->dma_mode == DMA_MODE_READ) {
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extern unsigned char floppy_fiqin_start, floppy_fiqin_end;
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extern unsigned char floppy_fiqin_start, floppy_fiqin_end;
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fiqhandler_start = &floppy_fiqin_start;
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fiqhandler_start = &floppy_fiqin_start;
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fiqhandler_length = &floppy_fiqin_end - &floppy_fiqin_start;
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fiqhandler_length = &floppy_fiqin_end - &floppy_fiqin_start;
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} else {
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} else {
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extern unsigned char floppy_fiqout_start, floppy_fiqout_end;
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extern unsigned char floppy_fiqout_start, floppy_fiqout_end;
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fiqhandler_start = &floppy_fiqout_start;
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fiqhandler_start = &floppy_fiqout_start;
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fiqhandler_length = &floppy_fiqout_end - &floppy_fiqout_start;
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fiqhandler_length = &floppy_fiqout_end - &floppy_fiqout_start;
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}
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}
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memcpy ((void *)0x1c, fiqhandler_start, fiqhandler_length);
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memcpy ((void *)0x1c, fiqhandler_start, fiqhandler_length);
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flush_page_to_ram(0);
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flush_page_to_ram(0);
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floppy_fiqsetup (dma->buf.length, __bus_to_virt(dma->buf.address), (int)PCIO_FLOPPYDMABASE);
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floppy_fiqsetup (dma->buf.length, __bus_to_virt(dma->buf.address), (int)PCIO_FLOPPYDMABASE);
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enable_irq (dma->dma_irq);
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enable_irq (dma->dma_irq);
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}
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}
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}
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}
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void arch_disable_dma(dmach_t channel, dma_t *dma)
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void arch_disable_dma(dmach_t channel, dma_t *dma)
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{
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{
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if (channel != DMA_VIRTUAL_FLOPPY)
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if (channel != DMA_VIRTUAL_FLOPPY)
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printk ("arch_disable_dma: invalid channel %d\n", channel);
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printk ("arch_disable_dma: invalid channel %d\n", channel);
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else
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else
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disable_irq (dma->dma_irq);
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disable_irq (dma->dma_irq);
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}
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}
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void arch_dma_init(dma_t *dma)
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void arch_dma_init(dma_t *dma)
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{
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{
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dma[DMA_VIRTUAL_FLOPPY].dma_irq = 64;
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dma[DMA_VIRTUAL_FLOPPY].dma_irq = 64;
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}
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}
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