149 lines
3.6 KiB
C
149 lines
3.6 KiB
C
/*
|
|
* 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
|