floppy.h

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/*
 *  arch/arm/include/asm/floppy.h
 *
 *  Copyright (C) 1996-2000 Russell King
 *
 * This program is free software; you can redistribute it and/or modify
 * it under the terms of the GNU General Public License version 2 as
 * published by the Free Software Foundation.
 *
 *  Note that we don't touch FLOPPY_DMA nor FLOPPY_IRQ here
 */
#ifndef __ASM_ARM_FLOPPY_H
#define __ASM_ARM_FLOPPY_H
#if 0
#include <mach/floppy.h>
#endif

#define fd_outb(val,port)           \
    do {                    \
        if ((port) == FD_DOR)       \
            fd_setdor((val));   \
        else                \
            outb((val),(port)); \
    } while(0)

#define fd_inb(port)        inb((port))
#define fd_request_irq()    request_irq(IRQ_FLOPPYDISK,floppy_interrupt,\
                        IRQF_DISABLED,"floppy",NULL)
#define fd_free_irq()       free_irq(IRQ_FLOPPYDISK,NULL)
#define fd_disable_irq()    disable_irq(IRQ_FLOPPYDISK)
#define fd_enable_irq()     enable_irq(IRQ_FLOPPYDISK)

static inline int fd_dma_setup(void *data, unsigned int length,
                   unsigned int mode, unsigned long addr)
{
    set_dma_mode(DMA_FLOPPY, mode);
    __set_dma_addr(DMA_FLOPPY, data);
    set_dma_count(DMA_FLOPPY, length);
    virtual_dma_port = addr;
    enable_dma(DMA_FLOPPY);
    return 0;
}
#define fd_dma_setup        fd_dma_setup

#define fd_request_dma()    request_dma(DMA_FLOPPY,"floppy")
#define fd_free_dma()       free_dma(DMA_FLOPPY)
#define fd_disable_dma()    disable_dma(DMA_FLOPPY)

/* need to clean up dma.h */
#define DMA_FLOPPYDISK      DMA_FLOPPY

/* Floppy_selects is the list of DOR's to select drive fd
 *
 * On initialisation, the floppy list is scanned, and the drives allocated
 * in the order that they are found.  This is done by seeking the drive
 * to a non-zero track, and then restoring it to track 0.  If an error occurs,
 * then there is no floppy drive present.       [to be put back in again]
 */
static unsigned char floppy_selects[2][4] =
{
    { 0x10, 0x21, 0x23, 0x33 },
    { 0x10, 0x21, 0x23, 0x33 }
};

#define fd_setdor(dor)                              \
do {                                        \
    int new_dor = (dor);                            \
    if (new_dor & 0xf0)                         \
        new_dor = (new_dor & 0x0c) | floppy_selects[fdc][new_dor & 3];  \
    else                                    \
        new_dor &= 0x0c;                        \
    outb(new_dor, FD_DOR);                          \
} while (0)

/*
 * Someday, we'll automatically detect which drives are present...
 */
static inline void fd_scandrives (void)
{
#if 0
    int floppy, drive_count;

    fd_disable_irq();
    raw_cmd = &default_raw_cmd;
    raw_cmd->flags = FD_RAW_SPIN | FD_RAW_NEED_SEEK;
    raw_cmd->track = 0;
    raw_cmd->rate = ?;
    drive_count = 0;
    for (floppy = 0; floppy < 4; floppy ++) {
        current_drive = drive_count;
        /*
         * Turn on floppy motor
         */
        if (start_motor(redo_fd_request))
            continue;
        /*
         * Set up FDC
         */
        fdc_specify();
        /*
         * Tell FDC to recalibrate
         */
        output_byte(FD_RECALIBRATE);
        LAST_OUT(UNIT(floppy));
        /* wait for command to complete */
        if (!successful) {
            int i;
            for (i = drive_count; i < 3; i--)
                floppy_selects[fdc][i] = floppy_selects[fdc][i + 1];
            floppy_selects[fdc][3] = 0;
            floppy -= 1;
        } else
            drive_count++;
    }
#else
    floppy_selects[0][0] = 0x10;
    floppy_selects[0][1] = 0x21;
    floppy_selects[0][2] = 0x23;
    floppy_selects[0][3] = 0x33;
#endif
}

#define FDC1 (0x3f0)

#define FLOPPY0_TYPE 4
#define FLOPPY1_TYPE 4

#define N_FDC 1
#define N_DRIVE 4

#define CROSS_64KB(a,s) (0)

/*
 * This allows people to reverse the order of
 * fd0 and fd1, in case their hardware is
 * strangely connected (as some RiscPCs
 * and A5000s seem to be).
 */
static void driveswap(int *ints, int dummy, int dummy2)
{
    floppy_selects[0][0] ^= floppy_selects[0][1];
    floppy_selects[0][1] ^= floppy_selects[0][0];
    floppy_selects[0][0] ^= floppy_selects[0][1];
}

#define EXTRA_FLOPPY_PARAMS ,{ "driveswap", &driveswap, NULL, 0, 0 }
    
#endif