floppy.h
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上传日期:2009-04-28
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文件大小:4k
- /*
- * linux/include/asm-arm/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 <asm/arch/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,
- SA_INTERRUPT|SA_SAMPLE_RANDOM,"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)
- #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)
- #define fd_enable_dma() enable_dma(DMA_FLOPPY)
- #define fd_clear_dma_ff() clear_dma_ff(DMA_FLOPPY)
- #define fd_set_dma_mode(mode) set_dma_mode(DMA_FLOPPY, (mode))
- #define fd_set_dma_addr(addr) set_dma_addr(DMA_FLOPPY, virt_to_bus((addr)))
- #define fd_set_dma_count(len) set_dma_count(DMA_FLOPPY, (len))
- #define fd_cacheflush(addr,sz)
- /* 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 FLOPPY_MOTOR_MASK 0xf0
- #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