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 #include <linux/config.h>
  17
  18 #ifndef MAX_HWIFS
  19 # ifdef CONFIG_BLK_DEV_IDEPCI
  20 #define MAX_HWIFS       10
  21 # else
  22 #define MAX_HWIFS       6
  23 # endif
  24 #endif
  25
  26 #define ide__sti()      __sti()
  27
  28 static __inline__ int ide_default_irq(ide_ioreg_t base)
  29 {
  30         switch (base) {
  31                 case 0x1f0: return 14;
  32                 case 0x170: return 15;
  33                 case 0x1e8: return 11;
  34                 case 0x168: return 10;
  35                 case 0x1e0: return 8;
  36                 case 0x160: return 12;
  37                 default:
  38                         return 0;
  39         }
  40 }
  41
  42 static __inline__ ide_ioreg_t ide_default_io_base(int index)
  43 {
  44         switch (index) {
  45                 case 0: return 0x1f0;
  46                 case 1: return 0x170;
  47                 case 2: return 0x1e8;
  48                 case 3: return 0x168;
  49                 case 4: return 0x1e0;
  50                 case 5: return 0x160;
  51                 default:
  52                         return 0;
  53         }
  54 }
  55
  56 static __inline__ void ide_init_hwif_ports(hw_regs_t *hw, ide_ioreg_t data_port, ide_ioreg_t ctrl_port, int *irq)
  57 {
  58         ide_ioreg_t reg = data_port;
  59         int i;
  60
  61         for (i = IDE_DATA_OFFSET; i <= IDE_STATUS_OFFSET; i++) {
  62                 hw->io_ports[i] = reg;
  63                 reg += 1;
  64         }
  65         if (ctrl_port) {
  66                 hw->io_ports[IDE_CONTROL_OFFSET] = ctrl_port;
  67         } else {
  68                 hw->io_ports[IDE_CONTROL_OFFSET] = hw->io_ports[IDE_DATA_OFFSET] + 0x206;
  69         }
  70         if (irq != NULL)
  71                 *irq = 0;
  72         hw->io_ports[IDE_IRQ_OFFSET] = 0;
  73 }
  74
  75 static __inline__ void ide_init_default_hwifs(void)
  76 {
  77 #ifndef CONFIG_BLK_DEV_IDEPCI
  78         hw_regs_t hw;
  79         int index;
  80
  81         for(index = 0; index < MAX_HWIFS; index++) {
  82                 ide_init_hwif_ports(&hw, ide_default_io_base(index), 0, NULL);
  83                 hw.irq = ide_default_irq(ide_default_io_base(index));
  84                 ide_register_hw(&hw, NULL);
  85         }
  86 #endif /* CONFIG_BLK_DEV_IDEPCI */
  87 }
  88
  89 typedef union {
  90         unsigned all                    : 8;    /* all of the bits together */
  91         struct {
  92                 unsigned head           : 4;    /* always zeros here */
  93                 unsigned unit           : 1;    /* drive select number, 0 or 1 */
  94                 unsigned bit5           : 1;    /* always 1 */
  95                 unsigned lba            : 1;    /* using LBA instead of CHS */
  96                 unsigned bit7           : 1;    /* always 1 */
  97         } b;
  98         } select_t;
  99
 100 #define ide_request_irq(irq,hand,flg,dev,id)    request_irq((irq),(hand),(flg),(dev),(id))
 101 #define ide_free_irq(irq,dev_id)                free_irq((irq), (dev_id))
 102 #define ide_check_region(from,extent)           check_region((from), (extent))
 103 #define ide_request_region(from,extent,name)    request_region((from), (extent), (name))
 104 #define ide_release_region(from,extent)         release_region((from), (extent))
 105
 106 /*
 107  * The following are not needed for the non-m68k ports
 108  */
 109 #define ide_ack_intr(hwif)              (1)
 110 #define ide_fix_driveid(id)             do {} while (0)
 111 #define ide_release_lock(lock)          do {} while (0)
 112 #define ide_get_lock(lock, hdlr, data)  do {} while (0)
 113
 114 #endif /* __KERNEL__ */
 115
 116 #endif /* __ASMi386_IDE_H */