diff options
Diffstat (limited to 'arch/arm/include/asm/floppy.h')
-rw-r--r-- | arch/arm/include/asm/floppy.h | 83 |
1 files changed, 83 insertions, 0 deletions
diff --git a/arch/arm/include/asm/floppy.h b/arch/arm/include/asm/floppy.h new file mode 100644 index 0000000000..e1cb04ed50 --- /dev/null +++ b/arch/arm/include/asm/floppy.h @@ -0,0 +1,83 @@ +/* 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 + +#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) +{ + swap(floppy_selects[0], floppy_selects[1]); +} + +#define EXTRA_FLOPPY_PARAMS ,{ "driveswap", &driveswap, NULL, 0, 0 } + +#endif |