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[/] [or1k_old/] [trunk/] [rc203soc/] [sw/] [uClinux/] [arch/] [armnommu/] [kernel/] [dma-a5k.c] - Blame information for rev 1765

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

Line No.	Rev	Author	Line
1	1622	jcastillo	`/*`
2			`* arch/arm/kernel/dma-a5k.c`
3			`*`
4			`* Copyright (C) 1998 Russell King`
5			`*`
6			`* DMA functions specific to A5000 architecture`
7			`*/`
8			`#include <linux/sched.h>`
9
10			`#include <asm/dma.h>`
11			`#include <asm/io.h>`
12			`#include <asm/hardware.h>`
13			`#include <asm/pgtable.h>`
14
15			`#include "dma.h"`
16
17			`int arch_request_dma(dmach_t channel, dma_t dma, const char devname)`
18			`{`
19			`if (channel == DMA_VIRTUAL_FLOPPY)`
20			`return 0;`
21			`else`
22			`return -EINVAL;`
23			`}`
24
25			`void arch_free_dma(dmach_t channel, dma_t *dma)`
26			`{`
27			`if (channel != DMA_VIRTUAL_FLOPPY)`
28			`printk ("arch_free_dma: invalid channel %d\n", channel);`
29			`}`
30
31			`int arch_get_dma_residue(dmach_t channel, dma_t *dma)`
32			`{`
33			`if (channel != DMA_VIRTUAL_FLOPPY) {`
34			`printk ("arch_dma_count: invalid channel %d\n", channel);`
35			`return 0;`
36			`} else {`
37			`extern int floppy_fiqresidual(void);`
38			`return floppy_fiqresidual();`
39			`}`
40			`}`
41
42			`void arch_enable_dma(dmach_t channel, dma_t *dma)`
43			`{`
44			`if (channel != DMA_VIRTUAL_FLOPPY)`
45			`printk ("arch_enable_dma: invalid channel %d\n", channel);`
46			`else {`
47			`void *fiqhandler_start;`
48			`unsigned int fiqhandler_length;`
49			`extern void floppy_fiqsetup (unsigned long len, unsigned long addr,`
50			`unsigned long port);`
51
52			`if (dma->dma_mode == DMA_MODE_READ) {`
53			`extern unsigned char floppy_fiqin_start, floppy_fiqin_end;`
54			`fiqhandler_start = &floppy_fiqin_start;`
55			`fiqhandler_length = &floppy_fiqin_end - &floppy_fiqin_start;`
56			`} else {`
57			`extern unsigned char floppy_fiqout_start, floppy_fiqout_end;`
58			`fiqhandler_start = &floppy_fiqout_start;`
59			`fiqhandler_length = &floppy_fiqout_end - &floppy_fiqout_start;`
60			`}`
61			`memcpy ((void *)0x1c, fiqhandler_start, fiqhandler_length);`
62			`flush_page_to_ram(0);`
63			`floppy_fiqsetup (dma->buf.length, __bus_to_virt(dma->buf.address), (int)PCIO_FLOPPYDMABASE);`
64			`enable_irq (dma->dma_irq);`
65			`}`
66			`}`
67
68			`void arch_disable_dma(dmach_t channel, dma_t *dma)`
69			`{`
70			`if (channel != DMA_VIRTUAL_FLOPPY)`
71			`printk ("arch_disable_dma: invalid channel %d\n", channel);`
72			`else`
73			`disable_irq (dma->dma_irq);`
74			`}`
75
76			`void arch_dma_init(dma_t *dma)`
77			`{`
78			`dma[DMA_VIRTUAL_FLOPPY].dma_irq = 64;`
79			`}`

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[/] [or1k_old/] [trunk/] [rc203soc/] [sw/] [uClinux/] [arch/] [armnommu/] [kernel/] [dma-a5k.c] - Blame information for rev 1765