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/init.h>
  13#include <linux/linkage.h>
  14#include <linux/types.h>
  15#include <linux/mm.h>
  16#include <asm/addrspace.h>
  17#include <asm/jazz.h>
  18#include <asm/jazzdma.h>
  19#include <asm/pgtable.h>
  20
  21static inline unsigned char fd_inb(unsigned int port)
  22{
  23        unsigned char c;
  24
  25        c = *(volatile unsigned char *) port;
  26        udelay(1);
  27
  28        return c;
  29}
  30
  31static inline void fd_outb(unsigned char value, unsigned int port)
  32{
  33        *(volatile unsigned char *) port = value;
  34}
  35
  36/*
  37 * How to access the floppy DMA functions.
  38 */
  39static inline void fd_enable_dma(void)
  40{
  41        vdma_enable(JAZZ_FLOPPY_DMA);
  42}
  43
  44static inline void fd_disable_dma(void)
  45{
  46        vdma_disable(JAZZ_FLOPPY_DMA);
  47}
  48
  49static inline int fd_request_dma(void)
  50{
  51        return 0;
  52}
  53
  54static inline void fd_free_dma(void)
  55{
  56}
  57
  58static inline void fd_clear_dma_ff(void)
  59{
  60}
  61
  62static inline void fd_set_dma_mode(char mode)
  63{
  64        vdma_set_mode(JAZZ_FLOPPY_DMA, mode);
  65}
  66
  67static inline void fd_set_dma_addr(char *a)
  68{
  69        vdma_set_addr(JAZZ_FLOPPY_DMA, vdma_phys2log(CPHYSADDR((unsigned long)a)));
  70}
  71
  72static inline void fd_set_dma_count(unsigned int count)
  73{
  74        vdma_set_count(JAZZ_FLOPPY_DMA, count);
  75}
  76
  77static inline int fd_get_dma_residue(void)
  78{
  79        return vdma_get_residue(JAZZ_FLOPPY_DMA);
  80}
  81
  82static inline void fd_enable_irq(void)
  83{
  84}
  85
  86static inline void fd_disable_irq(void)
  87{
  88}
  89
  90static inline int fd_request_irq(void)
  91{
  92        return request_irq(FLOPPY_IRQ, floppy_interrupt,
  93                           0, "floppy", NULL);
  94}
  95
  96static inline void fd_free_irq(void)
  97{
  98        free_irq(FLOPPY_IRQ, NULL);
  99}
 100
 101static inline unsigned long fd_getfdaddr1(void)
 102{
 103        return JAZZ_FDC_BASE;
 104}
 105
 106static inline unsigned long fd_dma_mem_alloc(unsigned long size)
 107{
 108        unsigned long mem;
 109
 110        mem = __get_dma_pages(GFP_KERNEL, get_order(size));
 111        if(!mem)
 112                return 0;
 113        vdma_alloc(CPHYSADDR(mem), size);       /* XXX error checking */
 114
 115        return mem;
 116}
 117
 118static inline void fd_dma_mem_free(unsigned long addr, unsigned long size)
 119{
 120        vdma_free(vdma_phys2log(CPHYSADDR(addr)));
 121        free_pages(addr, get_order(size));
 122}
 123
 124static inline unsigned long fd_drive_type(unsigned long n)
 125{
 126        /* XXX This is wrong for machines with ED 2.88mb disk drives like the
 127           Olivetti M700.  Anyway, we should suck this from the ARC
 128           firmware.  */
 129        if (n == 0)
 130                return 4;       /* 3,5", 1.44mb */
 131
 132        return 0;
 133}
 134
 135#endif /* __ASM_MACH_JAZZ_FLOPPY_H */
 136