root/include/asm-mips/floppy.h

/* */

INCLUDED FROM

DEFINITIONS

1. mips_dma_mem_alloc
2. mips_dma_mem_free

   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
   9  */
  10 #ifndef __ASM_MIPS_FLOPPY_H
  11 #define __ASM_MIPS_FLOPPY_H
  12 
  13 #include <asm/bootinfo.h>
  14 #include <asm/jazz.h>
  15 #include <asm/jazzdma.h>
  16 #include <asm/mipsconfig.h>
  17 #include <asm/vector.h>
  18 
  19 #define fd_inb(port)                    feature->fd_inb(port)
  20 #define fd_outb(value,port)             feature->fd_outb(value,port)
  21 
  22 #define fd_enable_dma()                 feature->fd_enable_dma()
  23 #define fd_disable_dma()                feature->fd_disable_dma()
  24 #define fd_request_dma()                feature->fd_request_dma()
  25 #define fd_free_dma()                   feature->fd_free_dma()
  26 #define fd_clear_dma_ff()               feature->fd_clear_dma_ff()
  27 #define fd_set_dma_mode(mode)           feature->fd_set_dma_mode(mode)
  28 #define fd_set_dma_addr(addr)           feature->fd_set_dma_addr(addr)
  29 #define fd_set_dma_count(count)         feature->fd_set_dma_count(count)
  30 #define fd_get_dma_residue()            feature->fd_get_dma_residue()
  31 #define fd_enable_irq()                 feature->fd_enable_irq()
  32 #define fd_disable_irq()                feature->fd_disable_irq()
  33 #define fd_cacheflush(addr, size)       feature->fd_cacheflush((void *)addr, size)
  34 #define fd_request_irq()        request_irq(FLOPPY_IRQ, floppy_interrupt, \
  35                                             SA_INTERRUPT|SA_SAMPLE_RANDOM, \
  36                                             "floppy", NULL)
  37 #define fd_free_irq()           free_irq(FLOPPY_IRQ, NULL);
  38 
  39 #define MAX_BUFFER_SECTORS 24
  40 
  41 static unsigned long mips_dma_mem_alloc(unsigned long size)
     /*  */
  42 {
  43         int order = __get_order(size);
  44         unsigned long mem;
  45 
  46         mem = __get_dma_pages(GFP_KERNEL,order);
  47         if(!mem)
  48                 return 0;
  49         if (boot_info.machtype == MACH_ACER_PICA_61 ||
  50             boot_info.machtype == MACH_MIPS_MAGNUM_4000 ||
  51             boot_info.machtype == MACH_OLIVETTI_M700)
  52                 vdma_alloc(PHYSADDR(mem), size);
  53         return mem;
  54 }
  55 
  56 static void mips_dma_mem_free(unsigned long addr, unsigned long size)
     /*  */
  57 {       
  58         if (boot_info.machtype == MACH_ACER_PICA_61 ||
  59             boot_info.machtype == MACH_MIPS_MAGNUM_4000 ||
  60             boot_info.machtype == MACH_OLIVETTI_M700)
  61                 vdma_free(PHYSADDR(addr));
  62         free_pages(addr, __get_order(size));    
  63 }
  64 
  65 #define fd_dma_mem_alloc(mem,size) mips_dma_mem_alloc(mem,size)
  66 #define fd_dma_mem_free(mem) mips_dma_mem_free(mem)
  67 
  68 /*
  69  * And on Mips's the CMOS info fails also ...
  70  *
  71  * FIXME: This information should come from the ARC configuration tree
  72  *        or wherever a particular machine has stored this ...
  73  */
  74 #define FLOPPY0_TYPE 4          /* this is wrong for the Olli M700, but who cares... */
  75 #define FLOPPY1_TYPE 0
  76 
  77 #define FDC1                    ((boot_info.machtype == MACH_ACER_PICA_61 || \
  78                                 boot_info.machtype == MACH_MIPS_MAGNUM_4000 || \
  79                                 boot_info.machtype == MACH_OLIVETTI_M700) ? \
  80                                 0xe0003000 : 0x3f0)
  81 static int FDC2=-1;
  82 
  83 #define N_FDC 1                 /* do you *really* want a second controller? */
  84 #define N_DRIVE 8
  85 
  86 /*
  87  * The DMA channel used by the floppy controller cannot access data at
  88  * addresses >= 16MB
  89  *
  90  * Went back to the 1MB limit, as some people had problems with the floppy
  91  * driver otherwise. It doesn't matter much for performance anyway, as most
  92  * floppy accesses go through the track buffer.
  93  *
  94  * On MIPSes using vdma, this actually means that *all* transfers go thru
  95  * the * track buffer since 0x1000000 is always smaller than KSEG0/1.
  96  * Actually this needs to be a bit more complicated since the so much different
  97  * hardware available with MIPS CPUs ...
  98  */
  99 #define CROSS_64KB(a,s) ((unsigned long)(a)/K_64 != ((unsigned long)(a) + (s) - 1) / K_64)
 100 
 101 #endif /* __ASM_MIPS_FLOPPY_H */

/* */