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96 lines
3.4 KiB
96 lines
3.4 KiB
/*
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* Architecture specific parts of the Floppy driver
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*
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* This file is subject to the terms and conditions of the GNU General Public
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* License. See the file "COPYING" in the main directory of this archive
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* for more details.
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*
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* Copyright (C) 1995 - 2000 Ralf Baechle
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*/
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#ifndef _ASM_FLOPPY_H
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#define _ASM_FLOPPY_H
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struct fd_ops {
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unsigned char (*fd_inb)(unsigned int port);
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void (*fd_outb)(unsigned char value, unsigned int port);
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/*
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* How to access the floppy DMA functions.
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*/
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void (*fd_enable_dma)(int channel);
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void (*fd_disable_dma)(int channel);
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int (*fd_request_dma)(int channel);
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void (*fd_free_dma)(int channel);
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void (*fd_clear_dma_ff)(int channel);
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void (*fd_set_dma_mode)(int channel, char mode);
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void (*fd_set_dma_addr)(int channel, unsigned int a);
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void (*fd_set_dma_count)(int channel, unsigned int count);
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int (*fd_get_dma_residue)(int channel);
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void (*fd_enable_irq)(int irq);
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void (*fd_disable_irq)(int irq);
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unsigned long (*fd_getfdaddr1)(void);
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unsigned long (*fd_dma_mem_alloc)(unsigned long size);
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void (*fd_dma_mem_free)(unsigned long addr, unsigned long size);
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unsigned long (*fd_drive_type)(unsigned long);
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};
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extern struct fd_ops *fd_ops;
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#define fd_inb(port) fd_ops->fd_inb(port)
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#define fd_outb(value,port) fd_ops->fd_outb(value,port)
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#define fd_enable_dma() fd_ops->fd_enable_dma(FLOPPY_DMA)
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#define fd_disable_dma() fd_ops->fd_disable_dma(FLOPPY_DMA)
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#define fd_request_dma() fd_ops->fd_request_dma(FLOPPY_DMA)
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#define fd_free_dma() fd_ops->fd_free_dma(FLOPPY_DMA)
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#define fd_clear_dma_ff() fd_ops->fd_clear_dma_ff(FLOPPY_DMA)
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#define fd_set_dma_mode(mode) fd_ops->fd_set_dma_mode(FLOPPY_DMA, mode)
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#define fd_set_dma_addr(addr) fd_ops->fd_set_dma_addr(FLOPPY_DMA, \
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virt_to_bus(addr))
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#define fd_set_dma_count(count) fd_ops->fd_set_dma_count(FLOPPY_DMA,count)
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#define fd_get_dma_residue() fd_ops->fd_get_dma_residue(FLOPPY_DMA)
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#define fd_enable_irq() fd_ops->fd_enable_irq(FLOPPY_IRQ)
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#define fd_disable_irq() fd_ops->fd_disable_irq(FLOPPY_IRQ)
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#define fd_dma_mem_alloc(size) fd_ops->fd_dma_mem_alloc(size)
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#define fd_dma_mem_free(mem,size) fd_ops->fd_dma_mem_free(mem,size)
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#define fd_drive_type(n) fd_ops->fd_drive_type(n)
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#define fd_cacheflush(addr,size) CPU_FlushDCache(addr,size);
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#define MAX_BUFFER_SECTORS 24
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/*
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* And on Mips's the CMOS info fails also ...
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*
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* FIXME: This information should come from the ARC configuration tree
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* or whereever a particular machine has stored this ...
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*/
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#define FLOPPY0_TYPE fd_drive_type(0)
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#define FLOPPY1_TYPE fd_drive_type(1)
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#define FDC1 fd_ops->fd_getfdaddr1();
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#define N_FDC 1 /* do you *really* want a second controller? */
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#define N_DRIVE 8
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#define FLOPPY_MOTOR_MASK 0xf0
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/*
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* The DMA channel used by the floppy controller cannot access data at
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* addresses >= 16MB
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*
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* Went back to the 1MB limit, as some people had problems with the floppy
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* driver otherwise. It doesn't matter much for performance anyway, as most
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* floppy accesses go through the track buffer.
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*
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* On MIPSes using vdma, this actually means that *all* transfers go thru
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* the * track buffer since 0x1000000 is always smaller than KSEG0/1.
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* Actually this needs to be a bit more complicated since the so much different
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* hardware available with MIPS CPUs ...
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*/
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#define CROSS_64KB(a,s) ((unsigned long)(a)/K_64 != ((unsigned long)(a) + (s) - 1) / K_64)
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#define EXTRA_FLOPPY_PARAMS
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#endif /* _ASM_FLOPPY_H */
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