floppy.h

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    1 /*
    2  * Architecture specific parts of the Floppy driver
    3  *
    4  * This file is subject to the terms and conditions of the GNU General Public
    5  * License.  See the file "COPYING" in the main directory of this archive
    6  * for more details.
    7  *
    8  * Copyright (C) 1995 - 2000 Ralf Baechle
    9  */
   10 #ifndef _ASM_FLOPPY_H
   11 #define _ASM_FLOPPY_H
   12 
   13 struct fd_ops {
   14         unsigned char (*fd_inb)(unsigned int port);
   15         void (*fd_outb)(unsigned char value, unsigned int port);
   16 
   17         /*
   18          * How to access the floppy DMA functions.
   19          */
   20         void (*fd_enable_dma)(int channel);
   21         void (*fd_disable_dma)(int channel);
   22         int (*fd_request_dma)(int channel);
   23         void (*fd_free_dma)(int channel);
   24         void (*fd_clear_dma_ff)(int channel);
   25         void (*fd_set_dma_mode)(int channel, char mode);
   26         void (*fd_set_dma_addr)(int channel, unsigned int a);
   27         void (*fd_set_dma_count)(int channel, unsigned int count);
   28         int (*fd_get_dma_residue)(int channel);
   29         void (*fd_enable_irq)(int irq);
   30         void (*fd_disable_irq)(int irq);
   31         unsigned long (*fd_getfdaddr1)(void);
   32         unsigned long (*fd_dma_mem_alloc)(unsigned long size);
   33         void (*fd_dma_mem_free)(unsigned long addr, unsigned long size);
   34         unsigned long (*fd_drive_type)(unsigned long);
   35 };
   36 
   37 extern struct fd_ops *fd_ops;
   38 
   39 #define fd_inb(port)            fd_ops->fd_inb(port)
   40 #define fd_outb(value,port)     fd_ops->fd_outb(value,port)
   41 
   42 #define fd_enable_dma()         fd_ops->fd_enable_dma(FLOPPY_DMA)
   43 #define fd_disable_dma()        fd_ops->fd_disable_dma(FLOPPY_DMA)
   44 #define fd_request_dma()        fd_ops->fd_request_dma(FLOPPY_DMA)
   45 #define fd_free_dma()           fd_ops->fd_free_dma(FLOPPY_DMA)
   46 #define fd_clear_dma_ff()       fd_ops->fd_clear_dma_ff(FLOPPY_DMA)
   47 #define fd_set_dma_mode(mode)   fd_ops->fd_set_dma_mode(FLOPPY_DMA, mode)
   48 #define fd_set_dma_addr(addr)   fd_ops->fd_set_dma_addr(FLOPPY_DMA, \
   49                                                        virt_to_bus(addr))
   50 #define fd_set_dma_count(count) fd_ops->fd_set_dma_count(FLOPPY_DMA,count)
   51 #define fd_get_dma_residue()    fd_ops->fd_get_dma_residue(FLOPPY_DMA)
   52 
   53 #define fd_enable_irq()         fd_ops->fd_enable_irq(FLOPPY_IRQ)
   54 #define fd_disable_irq()        fd_ops->fd_disable_irq(FLOPPY_IRQ)
   55 #define fd_request_irq()        request_irq(FLOPPY_IRQ, floppy_interrupt, \
   56                                             SA_INTERRUPT | SA_SAMPLE_RANDOM, \
   57                                             "floppy", NULL)
   58 #define fd_free_irq()           free_irq(FLOPPY_IRQ, NULL);
   59 #define fd_dma_mem_alloc(size)  fd_ops->fd_dma_mem_alloc(size)
   60 #define fd_dma_mem_free(mem,size) fd_ops->fd_dma_mem_free(mem,size)
   61 #define fd_drive_type(n)        fd_ops->fd_drive_type(n)
   62 #define fd_cacheflush(addr,size) dma_cache_wback_inv(addr,size)
   63 
   64 #define MAX_BUFFER_SECTORS 24
   65 
   66 
   67 /*
   68  * And on Mips's the CMOS info fails also ...
   69  *
   70  * FIXME: This information should come from the ARC configuration tree
   71  *        or whereever a particular machine has stored this ...
   72  */
   73 #define FLOPPY0_TYPE                    fd_drive_type(0)
   74 #define FLOPPY1_TYPE                    fd_drive_type(1)
   75 
   76 #define FDC1                    fd_ops->fd_getfdaddr1();
   77 
   78 #define N_FDC 1                 /* do you *really* want a second controller? */
   79 #define N_DRIVE 8
   80 
   81 #define FLOPPY_MOTOR_MASK 0xf0
   82 
   83 /*
   84  * The DMA channel used by the floppy controller cannot access data at
   85  * addresses >= 16MB
   86  *
   87  * Went back to the 1MB limit, as some people had problems with the floppy
   88  * driver otherwise. It doesn't matter much for performance anyway, as most
   89  * floppy accesses go through the track buffer.
   90  *
   91  * On MIPSes using vdma, this actually means that *all* transfers go thru
   92  * the * track buffer since 0x1000000 is always smaller than KSEG0/1.
   93  * Actually this needs to be a bit more complicated since the so much different
   94  * hardware available with MIPS CPUs ...
   95  */
   96 #define CROSS_64KB(a,s) ((unsigned long)(a)/K_64 != ((unsigned long)(a) + (s) - 1) / K_64)
   97 
   98 #define EXTRA_FLOPPY_PARAMS
   99 
  100 #endif /* _ASM_FLOPPY_H */

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FreeBSD/Linux Kernel Cross Reference sys/include/asm-mips64/floppy.h

FreeBSD/Linux Kernel Cross Reference
sys/include/asm-mips64/floppy.h