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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

 */

#ifndef __ASM_MIPS_FLOPPY_H

#define __ASM_MIPS_FLOPPY_H

#include <asm/bootinfo.h>

#include <asm/jazz.h>

#include <asm/jazzdma.h>

#include <asm/mipsconfig.h>

#include <asm/vector.h>

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

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

#define fd_enable_dma()                 feature->fd_enable_dma()

#define fd_disable_dma()                feature->fd_disable_dma()

#define fd_request_dma()                feature->fd_request_dma()

#define fd_free_dma()                   feature->fd_free_dma()

#define fd_clear_dma_ff()               feature->fd_clear_dma_ff()

#define fd_set_dma_mode(mode)           feature->fd_set_dma_mode(mode)

#define fd_set_dma_addr(addr)           feature->fd_set_dma_addr(addr)

#define fd_set_dma_count(count)         feature->fd_set_dma_count(count)

#define fd_get_dma_residue()            feature->fd_get_dma_residue()

#define fd_enable_irq()                 feature->fd_enable_irq()

#define fd_disable_irq()                feature->fd_disable_irq()

#define fd_cacheflush(addr, size)       feature->fd_cacheflush((void *)addr, size)

#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 MAX_BUFFER_SECTORS 24

static unsigned long mips_dma_mem_alloc(unsigned long size)

{

        int order = __get_order(size);

        unsigned long mem;

        mem = __get_dma_pages(GFP_KERNEL,order);

        if(!mem)

                return 0;

        if (boot_info.machtype == MACH_ACER_PICA_61 ||

            boot_info.machtype == MACH_MIPS_MAGNUM_4000 ||

            boot_info.machtype == MACH_OLIVETTI_M700)

                vdma_alloc(PHYSADDR(mem), size);

        return mem;

}

static void mips_dma_mem_free(unsigned long addr, unsigned long size)

{

        if (boot_info.machtype == MACH_ACER_PICA_61 ||

            boot_info.machtype == MACH_MIPS_MAGNUM_4000 ||

            boot_info.machtype == MACH_OLIVETTI_M700)

                vdma_free(PHYSADDR(addr));

        free_pages(addr, __get_order(size));

}

#define fd_dma_mem_alloc(mem,size) mips_dma_mem_alloc(mem,size)

#define fd_dma_mem_free(mem) mips_dma_mem_free(mem)

/*

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

 *

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

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

 */

#define FLOPPY0_TYPE 4          /* this is wrong for the Olli M700, but who cares... */

#define FLOPPY1_TYPE 0

#define FDC1                    ((boot_info.machtype == MACH_ACER_PICA_61 || \

                                boot_info.machtype == MACH_MIPS_MAGNUM_4000 || \

                                boot_info.machtype == MACH_OLIVETTI_M700) ? \

                                0xe0003000 : 0x3f0)

static int FDC2=-1;

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

#define N_DRIVE 8

/*

 * 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)

#endif /* __ASM_MIPS_FLOPPY_H */