LXR linux/arch/mips/include/asm/mach-jazz/floppy.h

   1/*
   2 * This file is subject to the terms and conditions of the GNU General Public
   3 * License.  See the file "COPYING" in the main directory of this archive
   4 * for more details.
   5 *
   6 * Copyright (C) 1998, 2003 by Ralf Baechle
   7 */
   8#ifndef __ASM_MACH_JAZZ_FLOPPY_H
   9#define __ASM_MACH_JAZZ_FLOPPY_H
  10
  11#include <linux/delay.h>
  12#include <linux/linkage.h>
  13#include <linux/types.h>
  14#include <linux/mm.h>
  15#include <asm/addrspace.h>
  16#include <asm/jazz.h>
  17#include <asm/jazzdma.h>
  18
  19static inline unsigned char fd_inb(unsigned int base, unsigned int reg)
  20{
  21        unsigned char c;
  22
  23        c = *(volatile unsigned char *) (base + reg);
  24        udelay(1);
  25
  26        return c;
  27}
  28
  29static inline void fd_outb(unsigned char value, unsigned int base, unsigned int reg)
  30{
  31        *(volatile unsigned char *) (base + reg) = value;
  32}
  33
  34/*
  35 * How to access the floppy DMA functions.
  36 */
  37static inline void fd_enable_dma(void)
  38{
  39        vdma_enable(JAZZ_FLOPPY_DMA);
  40}
  41
  42static inline void fd_disable_dma(void)
  43{
  44        vdma_disable(JAZZ_FLOPPY_DMA);
  45}
  46
  47static inline int fd_request_dma(void)
  48{
  49        return 0;
  50}
  51
  52static inline void fd_free_dma(void)
  53{
  54}
  55
  56static inline void fd_clear_dma_ff(void)
  57{
  58}
  59
  60static inline void fd_set_dma_mode(char mode)
  61{
  62        vdma_set_mode(JAZZ_FLOPPY_DMA, mode);
  63}
  64
  65static inline void fd_set_dma_addr(char *a)
  66{
  67        vdma_set_addr(JAZZ_FLOPPY_DMA, vdma_phys2log(CPHYSADDR((unsigned long)a)));
  68}
  69
  70static inline void fd_set_dma_count(unsigned int count)
  71{
  72        vdma_set_count(JAZZ_FLOPPY_DMA, count);
  73}
  74
  75static inline int fd_get_dma_residue(void)
  76{
  77        return vdma_get_residue(JAZZ_FLOPPY_DMA);
  78}
  79
  80static inline void fd_enable_irq(void)
  81{
  82}
  83
  84static inline void fd_disable_irq(void)
  85{
  86}
  87
  88static inline int fd_request_irq(void)
  89{
  90        return request_irq(FLOPPY_IRQ, floppy_interrupt,
  91                           0, "floppy", NULL);
  92}
  93
  94static inline void fd_free_irq(void)
  95{
  96        free_irq(FLOPPY_IRQ, NULL);
  97}
  98
  99static inline unsigned long fd_getfdaddr1(void)
 100{
 101        return JAZZ_FDC_BASE;
 102}
 103
 104static inline unsigned long fd_dma_mem_alloc(unsigned long size)
 105{
 106        unsigned long mem;
 107
 108        mem = __get_dma_pages(GFP_KERNEL, get_order(size));
 109        if(!mem)
 110                return 0;
 111        vdma_alloc(CPHYSADDR(mem), size);       /* XXX error checking */
 112
 113        return mem;
 114}
 115
 116static inline void fd_dma_mem_free(unsigned long addr, unsigned long size)
 117{
 118        vdma_free(vdma_phys2log(CPHYSADDR(addr)));
 119        free_pages(addr, get_order(size));
 120}
 121
 122static inline unsigned long fd_drive_type(unsigned long n)
 123{
 124        /* XXX This is wrong for machines with ED 2.88mb disk drives like the
 125           Olivetti M700.  Anyway, we should suck this from the ARC
 126           firmware.  */
 127        if (n == 0)
 128                return 4;       /* 3,5", 1.44mb */
 129
 130        return 0;
 131}
 132
 133#endif /* __ASM_MACH_JAZZ_FLOPPY_H */
 134