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/*

 * Architecture specific parts of the Floppy driver

 *

 * This file is subject to the terms and conditions of the GNU General Public

 * License.  See the file "COPYING" in the main directory of this archive

 * for more details.

 *

 * Copyright (C) 1995 - 2000 Ralf Baechle

 */

#ifndef _ASM_FLOPPY_H

#define _ASM_FLOPPY_H

struct fd_ops {

        unsigned char (*fd_inb)(unsigned int port);

        void (*fd_outb)(unsigned char value, unsigned int port);

        /*

         * How to access the floppy DMA functions.

         */

        void (*fd_enable_dma)(int channel);

        void (*fd_disable_dma)(int channel);

        int (*fd_request_dma)(int channel);

        void (*fd_free_dma)(int channel);

        void (*fd_clear_dma_ff)(int channel);

        void (*fd_set_dma_mode)(int channel, char mode);

        void (*fd_set_dma_addr)(int channel, unsigned int a);

        void (*fd_set_dma_count)(int channel, unsigned int count);

        int (*fd_get_dma_residue)(int channel);

        void (*fd_enable_irq)(int irq);

        void (*fd_disable_irq)(int irq);

        unsigned long (*fd_getfdaddr1)(void);

        unsigned long (*fd_dma_mem_alloc)(unsigned long size);

        void (*fd_dma_mem_free)(unsigned long addr, unsigned long size);

        unsigned long (*fd_drive_type)(unsigned long);

};

extern struct fd_ops *fd_ops;

#define fd_inb(port)            fd_ops->fd_inb(port)

#define fd_outb(value,port)     fd_ops->fd_outb(value,port)

#define fd_enable_dma()         fd_ops->fd_enable_dma(FLOPPY_DMA)

#define fd_disable_dma()        fd_ops->fd_disable_dma(FLOPPY_DMA)

#define fd_request_dma()        fd_ops->fd_request_dma(FLOPPY_DMA)

#define fd_free_dma()           fd_ops->fd_free_dma(FLOPPY_DMA)

#define fd_clear_dma_ff()       fd_ops->fd_clear_dma_ff(FLOPPY_DMA)

#define fd_set_dma_mode(mode)   fd_ops->fd_set_dma_mode(FLOPPY_DMA, mode)

#define fd_set_dma_addr(addr)   fd_ops->fd_set_dma_addr(FLOPPY_DMA, \

                                                       virt_to_bus(addr))

#define fd_set_dma_count(count) fd_ops->fd_set_dma_count(FLOPPY_DMA,count)

#define fd_get_dma_residue()    fd_ops->fd_get_dma_residue(FLOPPY_DMA)

#define fd_enable_irq()         fd_ops->fd_enable_irq(FLOPPY_IRQ)

#define fd_disable_irq()        fd_ops->fd_disable_irq(FLOPPY_IRQ)

#define fd_request_irq()        request_irq(FLOPPY_IRQ, floppy_interrupt, \

                                            SA_INTERRUPT | SA_SAMPLE_RANDOM, \

                                            "floppy", NULL)

#define fd_free_irq()           free_irq(FLOPPY_IRQ, NULL);

#define fd_dma_mem_alloc(size)  fd_ops->fd_dma_mem_alloc(size)

#define fd_dma_mem_free(mem,size) fd_ops->fd_dma_mem_free(mem,size)

#define fd_drive_type(n)        fd_ops->fd_drive_type(n)

#define fd_cacheflush(addr,size) dma_cache_wback_inv(addr,size)

#define MAX_BUFFER_SECTORS 24

/*

 * And on Mips's the CMOS info fails also ...

 *

 * FIXME: This information should come from the ARC configuration tree

 *        or whereever a particular machine has stored this ...

 */

#define FLOPPY0_TYPE                    fd_drive_type(0)

#define FLOPPY1_TYPE                    fd_drive_type(1)

#define FDC1                    fd_ops->fd_getfdaddr1();

#define N_FDC 1                 /* do you *really* want a second controller? */

#define N_DRIVE 8

#define FLOPPY_MOTOR_MASK 0xf0

/*

 * The DMA channel used by the floppy controller cannot access data at

 * addresses >= 16MB

 *

 * Went back to the 1MB limit, as some people had problems with the floppy

 * driver otherwise. It doesn't matter much for performance anyway, as most

 * floppy accesses go through the track buffer.

 *

 * On MIPSes using vdma, this actually means that *all* transfers go thru

 * the * track buffer since 0x1000000 is always smaller than KSEG0/1.

 * Actually this needs to be a bit more complicated since the so much different

 * hardware available with MIPS CPUs ...

 */

#define CROSS_64KB(a,s) ((unsigned long)(a)/K_64 != ((unsigned long)(a) + (s) - 1) / K_64)

#define EXTRA_FLOPPY_PARAMS

#endif /* _ASM_FLOPPY_H */