include/asm-mips/floppy.h

   1 /* $Id: floppy.h,v 1.4 1998/05/07 18:38:41 ralf Exp $
   2  *
   3  * Architecture specific parts of the Floppy driver
   4  *
   5  * This file is subject to the terms and conditions of the GNU General Public
   6  * License.  See the file "COPYING" in the main directory of this archive
   7  * for more details.
   8  *
   9  * Copyright (C) 1995, 1996, 1997, 1998 Ralf Baechle
  10  */
  11 #ifndef __ASM_MIPS_FLOPPY_H
  12 #define __ASM_MIPS_FLOPPY_H
  13
  14 #include <asm/bootinfo.h>
  15 #include <asm/jazz.h>
  16 #include <asm/jazzdma.h>
  17 #include <asm/mipsconfig.h>
  18
  19 struct fd_ops {
  20         unsigned char (*fd_inb)(unsigned int port);
  21         void (*fd_outb)(unsigned char value, unsigned int port);
  22
  23         /*
  24          * How to access the floppy DMA functions.
  25          */
  26         void (*fd_enable_dma)(int channel);
  27         void (*fd_disable_dma)(int channel);
  28         int (*fd_request_dma)(int channel);
  29         void (*fd_free_dma)(int channel);
  30         void (*fd_clear_dma_ff)(int channel);
  31         void (*fd_set_dma_mode)(int channel, char mode);
  32         void (*fd_set_dma_addr)(int channel, unsigned int a);
  33         void (*fd_set_dma_count)(int channel, unsigned int count);
  34         int (*fd_get_dma_residue)(int channel);
  35         void (*fd_enable_irq)(int irq);
  36         void (*fd_disable_irq)(int irq);
  37         unsigned long (*fd_getfdaddr1)(void);
  38         unsigned long (*fd_dma_mem_alloc)(unsigned long size);
  39         void (*fd_dma_mem_free)(unsigned long addr, unsigned long size);
  40         unsigned long (*fd_drive_type)(unsigned long);
  41 };
  42
  43 extern struct fd_ops *fd_ops;
  44
  45 #define fd_inb(port)                    fd_ops->fd_inb(port)
  46 #define fd_outb(value,port)             fd_ops->fd_outb(value,port)
  47
  48 #define fd_enable_dma(channel)          fd_ops->fd_enable_dma(channel)
  49 #define fd_disable_dma(channel)         fd_ops->fd_disable_dma(channel)
  50 #define fd_request_dma(channel)         fd_ops->fd_request_dma(channel)
  51 #define fd_free_dma(channel)            fd_ops->fd_free_dma(channel)
  52 #define fd_clear_dma_ff(channel)        fd_ops->fd_clear_dma_ff(channel)
  53 #define fd_set_dma_mode(channel, mode)  fd_ops->fd_set_dma_mode(channel, mode)
  54 #define fd_set_dma_addr(channel, addr)  fd_ops->fd_set_dma_addr(channel, \
  55                                                  virt_to_bus(addr))
  56 #define fd_set_dma_count(channel,count) fd_ops->fd_set_dma_count(channel,count)
  57 #define fd_get_dma_residue(channel)     fd_ops->fd_get_dma_residue(channel)
  58
  59 #define fd_enable_irq(irq)              fd_ops->fd_enable_irq(irq)
  60 #define fd_disable_irq(irq)             fd_ops->fd_disable_irq(irq)
  61 #define fd_request_irq(irq)             request_irq(irq, floppy_interrupt, \
  62                                                     SA_INTERRUPT \
  63                                                     | SA_SAMPLE_RANDOM, \
  64                                                     "floppy", NULL)
  65 #define fd_free_irq(irq)                free_irq(irq, NULL);
  66 #define fd_dma_mem_alloc(size) fd_ops->fd_dma_mem_alloc(size)
  67 #define fd_dma_mem_free(mem,size) fd_ops->fd_dma_mem_free(mem,size)
  68 #define fd_drive_type(n)                fd_ops->fd_drive_type(n)
  69
  70 #define MAX_BUFFER_SECTORS 24
  71
  72
  73 /*
  74  * And on Mips's the CMOS info fails also ...
  75  *
  76  * FIXME: This information should come from the ARC configuration tree
  77  *        or whereever a particular machine has stored this ...
  78  */
  79 #define FLOPPY0_TYPE                    fd_drive_type(0)
  80 #define FLOPPY1_TYPE                    fd_drive_type(1)
  81
  82 #define FDC1                    fd_ops->fd_getfdaddr1();
  83 static int FDC2=-1;
  84
  85 #define N_FDC 1                 /* do you *really* want a second controller? */
  86 #define N_DRIVE 8
  87
  88 #define FLOPPY_MOTOR_MASK 0xf0
  89
  90 /*
  91  * The DMA channel used by the floppy controller cannot access data at
  92  * addresses >= 16MB
  93  *
  94  * Went back to the 1MB limit, as some people had problems with the floppy
  95  * driver otherwise. It doesn't matter much for performance anyway, as most
  96  * floppy accesses go through the track buffer.
  97  *
  98  * On MIPSes using vdma, this actually means that *all* transfers go thru
  99  * the * track buffer since 0x1000000 is always smaller than KSEG0/1.
 100  * Actually this needs to be a bit more complicated since the so much different
 101  * hardware available with MIPS CPUs ...
 102  */
 103 #define CROSS_64KB(a,s) ((unsigned long)(a)/K_64 != ((unsigned long)(a) + (s) - 1) / K_64)
 104
 105 #endif /* __ASM_MIPS_FLOPPY_H */