include/asm-i386/ide.h

   1 /*
   2  *  linux/include/asm-i386/ide.h
   3  *
   4  *  Copyright (C) 1994-1996  Linus Torvalds & authors
   5  */
   6
   7 /*
   8  *  This file contains the i386 architecture specific IDE code.
   9  */
  10
  11 #ifndef __ASMi386_IDE_H
  12 #define __ASMi386_IDE_H
  13
  14 #ifdef __KERNEL__
  15
  16 #ifndef MAX_HWIFS
  17 #define MAX_HWIFS       10
  18 #endif
  19
  20 #define ide__sti()      __sti()
  21
  22 static __inline__ int ide_default_irq(ide_ioreg_t base)
  23 {
  24         switch (base) {
  25                 case 0x1f0: return 14;
  26                 case 0x170: return 15;
  27                 case 0x1e8: return 11;
  28                 case 0x168: return 10;
  29                 case 0x1e0: return 8;
  30                 case 0x160: return 12;
  31                 default:
  32                         return 0;
  33         }
  34 }
  35
  36 static __inline__ ide_ioreg_t ide_default_io_base(int index)
  37 {
  38         switch (index) {
  39                 case 0: return 0x1f0;
  40                 case 1: return 0x170;
  41                 case 2: return 0x1e8;
  42                 case 3: return 0x168;
  43                 case 4: return 0x1e0;
  44                 case 5: return 0x160;
  45                 default:
  46                         return 0;
  47         }
  48 }
  49
  50 static __inline__ void ide_init_hwif_ports(hw_regs_t *hw, ide_ioreg_t data_port, ide_ioreg_t ctrl_port, int *irq)
  51 {
  52         ide_ioreg_t reg = data_port;
  53         int i;
  54
  55         for (i = IDE_DATA_OFFSET; i <= IDE_STATUS_OFFSET; i++) {
  56                 hw->io_ports[i] = reg;
  57                 reg += 1;
  58         }
  59         if (ctrl_port) {
  60                 hw->io_ports[IDE_CONTROL_OFFSET] = ctrl_port;
  61         } else {
  62                 hw->io_ports[IDE_CONTROL_OFFSET] = hw->io_ports[IDE_DATA_OFFSET] + 0x206;
  63         }
  64         if (irq != NULL)
  65                 *irq = 0;
  66 }
  67
  68 static __inline__ void ide_init_default_hwifs(void)
  69 {
  70 #ifndef CONFIG_BLK_DEV_IDEPCI
  71         hw_regs_t hw;
  72         int index;
  73
  74         for(index = 0; index < MAX_HWIFS; index++) {
  75                 ide_init_hwif_ports(&hw, ide_default_io_base(index), 0, NULL);
  76                 hw.irq = ide_default_irq(ide_default_io_base(index));
  77                 ide_register_hw(&hw, NULL);
  78         }
  79 #endif /* CONFIG_BLK_DEV_IDEPCI */
  80 }
  81
  82 typedef union {
  83         unsigned all                    : 8;    /* all of the bits together */
  84         struct {
  85                 unsigned head           : 4;    /* always zeros here */
  86                 unsigned unit           : 1;    /* drive select number, 0 or 1 */
  87                 unsigned bit5           : 1;    /* always 1 */
  88                 unsigned lba            : 1;    /* using LBA instead of CHS */
  89                 unsigned bit7           : 1;    /* always 1 */
  90         } b;
  91         } select_t;
  92
  93 #define ide_request_irq(irq,hand,flg,dev,id)    request_irq((irq),(hand),(flg),(dev),(id))
  94 #define ide_free_irq(irq,dev_id)                free_irq((irq), (dev_id))
  95 #define ide_check_region(from,extent)           check_region((from), (extent))
  96 #define ide_request_region(from,extent,name)    request_region((from), (extent), (name))
  97 #define ide_release_region(from,extent)         release_region((from), (extent))
  98
  99 /*
 100  * The following are not needed for the non-m68k ports
 101  */
 102 #define ide_ack_intr(hwif)              (1)
 103 #define ide_fix_driveid(id)             do {} while (0)
 104 #define ide_release_lock(lock)          do {} while (0)
 105 #define ide_get_lock(lock, hdlr, data)  do {} while (0)
 106
 107 #endif /* __KERNEL__ */
 108
 109 #endif /* __ASMi386_IDE_H */