/* SPDX-License-Identifier: GPL-2.0-only */
/*
 *  arch/arm/include/asm/floppy.h
 *
 *  Copyright (C) 1996-2000 Russell King
 *
 *  Note that we don't touch FLOPPY_DMA nor FLOPPY_IRQ here
 */
#ifndef __ASM_ARM_FLOPPY_H
#define __ASM_ARM_FLOPPY_H

#define fd_outb(val, base, reg)                                         \
        do {                                                            \
                int new_val = (val);                                    \
                if ((reg) == FD_DOR) {                                  \
                        if (new_val & 0xf0)                             \
                                new_val = (new_val & 0x0c) |            \
                                          floppy_selects[new_val & 3];  \
                        else                                            \
                                new_val &= 0x0c;                        \
                }                                                       \
                outb(new_val, (base) + (reg));                          \
        } while(0)

#define fd_inb(base, reg)       inb((base) + (reg))
#define fd_request_irq()        request_irq(IRQ_FLOPPYDISK,floppy_interrupt,\
                                            0,"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[4] = { 0x10, 0x21, 0x23, 0x33 };

#define FDC1 (0x3f0)

#define FLOPPY0_TYPE 4
#define FLOPPY1_TYPE 4

#define N_FDC 1
#define N_DRIVE 4

/*
 * 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)
{
        swap(floppy_selects[0], floppy_selects[1]);
}

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