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floppy.h

/*
 *  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

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