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[/] [or1k/] [trunk/] [uclinux/] [uClinux-2.0.x/] [arch/] [armnommu/] [kernel/] [dma-arc.c] - Blame information for rev 1765

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/*
 * arch/arm/kernel/dma-arc.c
 *
 * Copyright (C) 1998 Dave Gilbert / Russell King
 *
 * DMA functions specific to Archimedes architecture
 */
#include <linux/sched.h>
 
#include <asm/dma.h>
#include <asm/io.h>
#include <asm/hardware.h>
 
 
#include "dma.h"
 
int arch_get_dma_residue(dmach_t channel, dma_t *dma)
{
 if (channel != DMA_VIRTUAL_FLOPPY0 &&
     channel != DMA_VIRTUAL_FLOPPY1) {
    printk ("arch_dma_count: invalid channel %d\n", channel);
    return 0;
  } else {
    extern int fdc1772_bytestogo;
    return fdc1772_bytestogo;
  }
}
 
int arch_request_dma(dmach_t channel, dma_t *dma, const char *devname)
{
        if (channel == DMA_VIRTUAL_FLOPPY0 ||
            channel == DMA_VIRTUAL_FLOPPY1)
                return 0;
        else
                return -EINVAL;
}
 
void arch_free_dma(dmach_t channel, dma_t *dma)
{
        if (channel != DMA_VIRTUAL_FLOPPY0 &&
            channel != DMA_VIRTUAL_FLOPPY1)
                return 0;
        else
                return -EINVAL;
}
 
void arch_enable_dma(dmach_t channel, dma_t *dma)
{
        switch (channel) {
        case DMA_VIRTUAL_FLOPPY0: { /* Data DMA */
                switch (dma->dma_mode) {
                case DMA_MODE_READ: /* read */
                {
                        extern unsigned char fdc1772_dma_read, fdc1772_dma_read_end;
                        extern void fdc1772_setupdma(unsigned int count,unsigned int addr);
                        unsigned long flags;
#ifdef DEBUG
                        printk("enable_dma fdc1772 data read\n");
#endif
                        save_flags(flags);
                        cliIF();
 
                        memcpy ((void *)0x1c, (void *)&fdc1772_dma_read,
                                &fdc1772_dma_read_end - &fdc1772_dma_read);
                        fdc1772_setupdma(dma->buf.length, __bus_to_virt(dma->buf.address)); /* Sets data pointer up */
                        enable_irq (64);
                        restore_flags(flags);
                }
                break;
 
                case DMA_MODE_WRITE: /* write */
                {
                        extern unsigned char fdc1772_dma_write, fdc1772_dma_write_end;
                        extern void fdc1772_setupdma(unsigned int count,unsigned int addr);
                        unsigned long flags;
 
#ifdef DEBUG
                        printk("enable_dma fdc1772 data write\n");
#endif
                        save_flags(flags);
                        cliIF();
                        memcpy ((void *)0x1c, (void *)&fdc1772_dma_write,
                                &fdc1772_dma_write_end - &fdc1772_dma_write);
                        fdc1772_setupdma(dma->buf.length, __bus_to_virt(dma->buf.address)); /* Sets data pointer up */
                        enable_irq (64);
 
                        restore_flags(flags);
                }
                break;
                default:
                        printk ("enable_dma: dma%d not initialised\n", channel);
                        return;
                }
        }
        break;
 
        case DMA_VIRTUAL_FLOPPY1: { /* Command end FIQ - actually just sets a flag */
                /* Need to build a branch at the FIQ address */
                extern void fdc1772_comendhandler(void);
                unsigned long flags;
 
                /*printk("enable_dma fdc1772 command end FIQ\n");*/
                save_flags(flags);
                cliIF();
 
                *((unsigned int *)0x1c)=0xea000000 | (((unsigned int)fdc1772_comendhandler-(0x1c+8))/4); /* B fdc1772_comendhandler */
 
                restore_flags(flags);
        }
        break;
        }
}
 
void arch_disable_dma(dmach_t channel, dma_t *dma)
{
        if (channel != DMA_VIRTUAL_FLOPPY0 &&
            channel != DMA_VIRTUAL_FLOPPY1)
                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_FLOPPY0].dma_irq = 64;
        dma[DMA_VIRTUAL_FLOPPY1].dma_irq = 65;
}

Line No.	Rev	Author	Line
1	199	simons	`/*`
2			`* arch/arm/kernel/dma-arc.c`
3			`*`
4			`* Copyright (C) 1998 Dave Gilbert / Russell King`
5			`*`
6			`* DMA functions specific to Archimedes architecture`
7			`*/`
8			`#include <linux/sched.h>`
9
10			`#include <asm/dma.h>`
11			`#include <asm/io.h>`
12			`#include <asm/hardware.h>`
13
14
15			`#include "dma.h"`
16
17			`int arch_get_dma_residue(dmach_t channel, dma_t *dma)`
18			`{`
19			`if (channel != DMA_VIRTUAL_FLOPPY0 &&`
20			`channel != DMA_VIRTUAL_FLOPPY1) {`
21			`printk ("arch_dma_count: invalid channel %d\n", channel);`
22			`return 0;`
23			`} else {`
24			`extern int fdc1772_bytestogo;`
25			`return fdc1772_bytestogo;`
26			`}`
27			`}`
28
29			`int arch_request_dma(dmach_t channel, dma_t dma, const char devname)`
30			`{`
31			`if (channel == DMA_VIRTUAL_FLOPPY0 \|\|`
32			`channel == DMA_VIRTUAL_FLOPPY1)`
33			`return 0;`
34			`else`
35			`return -EINVAL;`
36			`}`
37
38			`void arch_free_dma(dmach_t channel, dma_t *dma)`
39			`{`
40			`if (channel != DMA_VIRTUAL_FLOPPY0 &&`
41			`channel != DMA_VIRTUAL_FLOPPY1)`
42			`return 0;`
43			`else`
44			`return -EINVAL;`
45			`}`
46
47			`void arch_enable_dma(dmach_t channel, dma_t *dma)`
48			`{`
49			`switch (channel) {`
50			`case DMA_VIRTUAL_FLOPPY0: { /* Data DMA */`
51			`switch (dma->dma_mode) {`
52			`case DMA_MODE_READ: /* read */`
53			`{`
54			`extern unsigned char fdc1772_dma_read, fdc1772_dma_read_end;`
55			`extern void fdc1772_setupdma(unsigned int count,unsigned int addr);`
56			`unsigned long flags;`
57			`#ifdef DEBUG`
58			`printk("enable_dma fdc1772 data read\n");`
59			`#endif`
60			`save_flags(flags);`
61			`cliIF();`
62
63			`memcpy ((void )0x1c, (void )&fdc1772_dma_read,`
64			`&fdc1772_dma_read_end - &fdc1772_dma_read);`
65			`fdc1772_setupdma(dma->buf.length, __bus_to_virt(dma->buf.address)); /* Sets data pointer up */`
66			`enable_irq (64);`
67			`restore_flags(flags);`
68			`}`
69			`break;`
70
71			`case DMA_MODE_WRITE: /* write */`
72			`{`
73			`extern unsigned char fdc1772_dma_write, fdc1772_dma_write_end;`
74			`extern void fdc1772_setupdma(unsigned int count,unsigned int addr);`
75			`unsigned long flags;`
76
77			`#ifdef DEBUG`
78			`printk("enable_dma fdc1772 data write\n");`
79			`#endif`
80			`save_flags(flags);`
81			`cliIF();`
82			`memcpy ((void )0x1c, (void )&fdc1772_dma_write,`
83			`&fdc1772_dma_write_end - &fdc1772_dma_write);`
84			`fdc1772_setupdma(dma->buf.length, __bus_to_virt(dma->buf.address)); /* Sets data pointer up */`
85			`enable_irq (64);`
86
87			`restore_flags(flags);`
88			`}`
89			`break;`
90			`default:`
91			`printk ("enable_dma: dma%d not initialised\n", channel);`
92			`return;`
93			`}`
94			`}`
95			`break;`
96
97			`case DMA_VIRTUAL_FLOPPY1: { /* Command end FIQ - actually just sets a flag */`
98			`/* Need to build a branch at the FIQ address */`
99			`extern void fdc1772_comendhandler(void);`
100			`unsigned long flags;`
101
102			`/printk("enable_dma fdc1772 command end FIQ\n");/`
103			`save_flags(flags);`
104			`cliIF();`
105
106			`((unsigned int )0x1c)=0xea000000 \| (((unsigned int)fdc1772_comendhandler-(0x1c+8))/4); /* B fdc1772_comendhandler */`
107
108			`restore_flags(flags);`
109			`}`
110			`break;`
111			`}`
112			`}`
113
114			`void arch_disable_dma(dmach_t channel, dma_t *dma)`
115			`{`
116			`if (channel != DMA_VIRTUAL_FLOPPY0 &&`
117			`channel != DMA_VIRTUAL_FLOPPY1)`
118			`printk("arch_disable_dma: invalid channel %d\n", channel);`
119			`else`
120			`disable_irq(dma->dma_irq);`
121			`}`
122
123			`void arch_dma_init(dma_t *dma)`
124			`{`
125			`dma[DMA_VIRTUAL_FLOPPY0].dma_irq = 64;`
126			`dma[DMA_VIRTUAL_FLOPPY1].dma_irq = 65;`
127			`}`

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[/] [or1k/] [trunk/] [uclinux/] [uClinux-2.0.x/] [arch/] [armnommu/] [kernel/] [dma-arc.c] - Blame information for rev 1765