142 строки
3.6 KiB
C
142 строки
3.6 KiB
C
/*
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* linux/include/asm-arm/floppy.h
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*
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* Copyright (C) 1996-2000 Russell King
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*
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* This program is free software; you can redistribute it and/or modify
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* it under the terms of the GNU General Public License version 2 as
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* published by the Free Software Foundation.
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*
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* Note that we don't touch FLOPPY_DMA nor FLOPPY_IRQ here
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*/
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#ifndef __ASM_ARM_FLOPPY_H
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#define __ASM_ARM_FLOPPY_H
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#define fd_outb(val,port) \
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do { \
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if ((port) == FD_DOR) \
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fd_setdor((val)); \
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else \
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outb((val),(port)); \
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} while(0)
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#define fd_inb(port) inb((port))
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#define fd_request_irq() request_irq(IRQ_FLOPPYDISK,floppy_interrupt,\
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SA_INTERRUPT|SA_SAMPLE_RANDOM,"floppy",NULL)
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#define fd_free_irq() free_irq(IRQ_FLOPPYDISK,NULL)
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#define fd_disable_irq() disable_irq(IRQ_FLOPPYDISK)
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#define fd_enable_irq() enable_irq(IRQ_FLOPPYDISK)
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#define fd_request_dma() request_dma(DMA_FLOPPY,"floppy")
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#define fd_free_dma() free_dma(DMA_FLOPPY)
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#define fd_disable_dma() disable_dma(DMA_FLOPPY)
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#define fd_enable_dma() enable_dma(DMA_FLOPPY)
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#define fd_clear_dma_ff() clear_dma_ff(DMA_FLOPPY)
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#define fd_set_dma_mode(mode) set_dma_mode(DMA_FLOPPY, (mode))
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#define fd_set_dma_addr(addr) set_dma_addr(DMA_FLOPPY, virt_to_bus((addr)))
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#define fd_set_dma_count(len) set_dma_count(DMA_FLOPPY, (len))
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#define fd_cacheflush(addr,sz)
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/* need to clean up dma.h */
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#define DMA_FLOPPYDISK DMA_FLOPPY
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/* Floppy_selects is the list of DOR's to select drive fd
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*
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* On initialisation, the floppy list is scanned, and the drives allocated
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* in the order that they are found. This is done by seeking the drive
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* to a non-zero track, and then restoring it to track 0. If an error occurs,
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* then there is no floppy drive present. [to be put back in again]
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*/
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static unsigned char floppy_selects[2][4] =
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{
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{ 0x10, 0x21, 0x23, 0x33 },
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{ 0x10, 0x21, 0x23, 0x33 }
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};
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#define fd_setdor(dor) \
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do { \
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int new_dor = (dor); \
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if (new_dor & 0xf0) \
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new_dor = (new_dor & 0x0c) | floppy_selects[fdc][new_dor & 3]; \
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else \
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new_dor &= 0x0c; \
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outb(new_dor, FD_DOR); \
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} while (0)
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/*
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* Someday, we'll automatically detect which drives are present...
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*/
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static inline void fd_scandrives (void)
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{
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#if 0
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int floppy, drive_count;
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fd_disable_irq();
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raw_cmd = &default_raw_cmd;
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raw_cmd->flags = FD_RAW_SPIN | FD_RAW_NEED_SEEK;
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raw_cmd->track = 0;
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raw_cmd->rate = ?;
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drive_count = 0;
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for (floppy = 0; floppy < 4; floppy ++) {
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current_drive = drive_count;
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/*
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* Turn on floppy motor
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*/
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if (start_motor(redo_fd_request))
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continue;
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/*
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* Set up FDC
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*/
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fdc_specify();
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/*
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* Tell FDC to recalibrate
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*/
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output_byte(FD_RECALIBRATE);
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LAST_OUT(UNIT(floppy));
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/* wait for command to complete */
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if (!successful) {
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int i;
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for (i = drive_count; i < 3; i--)
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floppy_selects[fdc][i] = floppy_selects[fdc][i + 1];
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floppy_selects[fdc][3] = 0;
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floppy -= 1;
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} else
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drive_count++;
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}
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#else
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floppy_selects[0][0] = 0x10;
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floppy_selects[0][1] = 0x21;
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floppy_selects[0][2] = 0x23;
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floppy_selects[0][3] = 0x33;
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#endif
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}
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#define FDC1 (0x3f0)
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#define FLOPPY0_TYPE 4
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#define FLOPPY1_TYPE 4
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#define N_FDC 1
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#define N_DRIVE 4
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#define FLOPPY_MOTOR_MASK 0xf0
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#define CROSS_64KB(a,s) (0)
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/*
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* This allows people to reverse the order of
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* fd0 and fd1, in case their hardware is
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* strangely connected (as some RiscPCs
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* and A5000s seem to be).
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*/
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static void driveswap(int *ints, int dummy, int dummy2)
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{
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floppy_selects[0][0] ^= floppy_selects[0][1];
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floppy_selects[0][1] ^= floppy_selects[0][0];
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floppy_selects[0][0] ^= floppy_selects[0][1];
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}
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#define EXTRA_FLOPPY_PARAMS ,{ "driveswap", &driveswap, NULL, 0, 0 }
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#endif
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