include/asm-mips/floppy.h

   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 #include <asm/bootinfo.h>
  14 #include <asm/jazz.h>
  15 #include <asm/jazzdma.h>
  16
  17 struct fd_ops {
  18         unsigned char (*fd_inb)(unsigned int port);
  19         void (*fd_outb)(unsigned char value, unsigned int port);
  20
  21         /*
  22          * How to access the floppy DMA functions.
  23          */
  24         void (*fd_enable_dma)(int channel);
  25         void (*fd_disable_dma)(int channel);
  26         int (*fd_request_dma)(int channel);
  27         void (*fd_free_dma)(int channel);
  28         void (*fd_clear_dma_ff)(int channel);
  29         void (*fd_set_dma_mode)(int channel, char mode);
  30         void (*fd_set_dma_addr)(int channel, unsigned int a);
  31         void (*fd_set_dma_count)(int channel, unsigned int count);
  32         int (*fd_get_dma_residue)(int channel);
  33         void (*fd_enable_irq)(int irq);
  34         void (*fd_disable_irq)(int irq);
  35         unsigned long (*fd_getfdaddr1)(void);
  36         unsigned long (*fd_dma_mem_alloc)(unsigned long size);
  37         void (*fd_dma_mem_free)(unsigned long addr, unsigned long size);
  38         unsigned long (*fd_drive_type)(unsigned long);
  39 };
  40
  41 extern struct fd_ops *fd_ops;
  42
  43 #define fd_inb(port)            fd_ops->fd_inb(port)
  44 #define fd_outb(value,port)     fd_ops->fd_outb(value,port)
  45
  46 #define fd_enable_dma()         fd_ops->fd_enable_dma(FLOPPY_DMA)
  47 #define fd_disable_dma()        fd_ops->fd_disable_dma(FLOPPY_DMA)
  48 #define fd_request_dma()        fd_ops->fd_request_dma(FLOPPY_DMA)
  49 #define fd_free_dma()           fd_ops->fd_free_dma(FLOPPY_DMA)
  50 #define fd_clear_dma_ff()       fd_ops->fd_clear_dma_ff(FLOPPY_DMA)
  51 #define fd_set_dma_mode(mode)   fd_ops->fd_set_dma_mode(FLOPPY_DMA, mode)
  52 #define fd_set_dma_addr(addr)   fd_ops->fd_set_dma_addr(FLOPPY_DMA, \
  53                                                        virt_to_bus(addr))
  54 #define fd_set_dma_count(count) fd_ops->fd_set_dma_count(FLOPPY_DMA,count)
  55 #define fd_get_dma_residue()    fd_ops->fd_get_dma_residue(FLOPPY_DMA)
  56
  57 #define fd_enable_irq()         fd_ops->fd_enable_irq(FLOPPY_IRQ)
  58 #define fd_disable_irq()        fd_ops->fd_disable_irq(FLOPPY_IRQ)
  59 #define fd_request_irq()        request_irq(FLOPPY_IRQ, floppy_interrupt, \
  60                                             SA_INTERRUPT | SA_SAMPLE_RANDOM, \
  61                                             "floppy", NULL)
  62 #define fd_free_irq()           free_irq(FLOPPY_IRQ, NULL);
  63 #define fd_dma_mem_alloc(size)  fd_ops->fd_dma_mem_alloc(size)
  64 #define fd_dma_mem_free(mem,size) fd_ops->fd_dma_mem_free(mem,size)
  65 #define fd_drive_type(n)        fd_ops->fd_drive_type(n)
  66 #define fd_cacheflush(addr,size) dma_cache_wback_inv(addr,size)
  67
  68 #define MAX_BUFFER_SECTORS 24
  69
  70
  71 /*
  72  * And on Mips's the CMOS info fails also ...
  73  *
  74  * FIXME: This information should come from the ARC configuration tree
  75  *        or whereever a particular machine has stored this ...
  76  */
  77 #define FLOPPY0_TYPE                    fd_drive_type(0)
  78 #define FLOPPY1_TYPE                    fd_drive_type(1)
  79
  80 #define FDC1                    fd_ops->fd_getfdaddr1();
  81
  82 /*
  83  * Hack: The floppy drivrer defines this, before including fdreg.h.  We use
  84  * to define FDC2 only one and keep it a static variable in floppy.c.
  85  */
  86 #ifdef FDPATCHES
  87 static int FDC2 = -1;
  88 #endif
  89
  90 #define N_FDC 1                 /* do you *really* want a second controller? */
  91 #define N_DRIVE 8
  92
  93 #define FLOPPY_MOTOR_MASK 0xf0
  94
  95 /*
  96  * The DMA channel used by the floppy controller cannot access data at
  97  * addresses >= 16MB
  98  *
  99  * Went back to the 1MB limit, as some people had problems with the floppy
 100  * driver otherwise. It doesn't matter much for performance anyway, as most
 101  * floppy accesses go through the track buffer.
 102  *
 103  * On MIPSes using vdma, this actually means that *all* transfers go thru
 104  * the * track buffer since 0x1000000 is always smaller than KSEG0/1.
 105  * Actually this needs to be a bit more complicated since the so much different
 106  * hardware available with MIPS CPUs ...
 107  */
 108 #define CROSS_64KB(a,s) ((unsigned long)(a)/K_64 != ((unsigned long)(a) + (s) - 1) / K_64)
 109
 110 #endif /* _ASM_FLOPPY_H */