include/asm-alpha/ide.h

   1 /*
   2  *  linux/include/asm-alpha/ide.h
   3  *
   4  *  Copyright (C) 1994-1996  Linus Torvalds & authors
   5  */
   6
   7 /*
   8  *  This file contains the alpha architecture specific IDE code.
   9  */
  10
  11 #ifndef __ASMalpha_IDE_H
  12 #define __ASMalpha_IDE_H
  13
  14 #ifdef __KERNEL__
  15
  16 #include <linux/config.h>
  17
  18 #ifndef MAX_HWIFS
  19 #define MAX_HWIFS       4
  20 #endif
  21
  22 #define ide__sti()      __sti()
  23
  24 static __inline__ int ide_default_irq(ide_ioreg_t base)
  25 {
  26         switch (base) {
  27                 case 0x1f0: return 14;
  28                 case 0x170: return 15;
  29                 case 0x1e8: return 11;
  30                 case 0x168: return 10;
  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                 default:
  44                         return 0;
  45         }
  46 }
  47
  48 static __inline__ void ide_init_hwif_ports(hw_regs_t *hw, ide_ioreg_t data_port, ide_ioreg_t ctrl_port, int *irq)
  49 {
  50         ide_ioreg_t reg = data_port;
  51         int i;
  52
  53         for (i = IDE_DATA_OFFSET; i <= IDE_STATUS_OFFSET; i++) {
  54                 hw->io_ports[i] = reg;
  55                 reg += 1;
  56         }
  57         if (ctrl_port) {
  58                 hw->io_ports[IDE_CONTROL_OFFSET] = ctrl_port;
  59         } else {
  60                 hw->io_ports[IDE_CONTROL_OFFSET] = hw->io_ports[IDE_DATA_OFFSET] + 0x206;
  61         }
  62         if (irq != NULL)
  63                 *irq = 0;
  64 }
  65
  66 /*
  67  * This registers the standard ports for this architecture with the IDE
  68  * driver.
  69  */
  70 static __inline__ void ide_init_default_hwifs(void)
  71 {
  72 #ifndef CONFIG_BLK_DEV_IDEPCI
  73         hw_regs_t hw;
  74         int index;
  75
  76         for (index = 0; index < MAX_HWIFS; index++) {
  77                 memset(&hw, 0, sizeof(hw_regs_t));
  78                 ide_init_hwif_ports(&hw, ide_default_io_base(index), 0, NULL);
  79                 hw.irq = ide_default_irq(ide_default_io_base(index));
  80                 ide_register_hw(&hw, NULL);
  81         }
  82 #endif /* CONFIG_BLK_DEV_IDEPCI */
  83 }
  84
  85 typedef union {
  86         unsigned all                    : 8;    /* all of the bits together */
  87         struct {
  88                 unsigned head           : 4;    /* always zeros here */
  89                 unsigned unit           : 1;    /* drive select number, 0 or 1 */
  90                 unsigned bit5           : 1;    /* always 1 */
  91                 unsigned lba            : 1;    /* using LBA instead of CHS */
  92                 unsigned bit7           : 1;    /* always 1 */
  93         } b;
  94         } select_t;
  95
  96 #define ide_request_irq(irq,hand,flg,dev,id)    request_irq((irq),(hand),(flg),(dev),(id))
  97 #define ide_free_irq(irq,dev_id)                free_irq((irq), (dev_id))
  98 #define ide_check_region(from,extent)           check_region((from), (extent))
  99 #define ide_request_region(from,extent,name)    request_region((from), (extent), (name))
 100 #define ide_release_region(from,extent)         release_region((from), (extent))
 101
 102 /*
 103  * The following are not needed for the non-m68k ports
 104  */
 105 #define ide_ack_intr(hwif)              (1)
 106 #define ide_fix_driveid(id)             do {} while (0)
 107 #define ide_release_lock(lock)          do {} while (0)
 108 #define ide_get_lock(lock, hdlr, data)  do {} while (0)
 109
 110 #endif /* __KERNEL__ */
 111
 112 #endif /* __ASMalpha_IDE_H */