i386/linux-2.3.21/include/asm-i386/parport.h

   1 /*
   2  * parport.h: ia32-specific parport initialisation
   3  *
   4  * Copyright (C) 1999  Tim Waugh <tim@cyberelk.demon.co.uk>
   5  *
   6  * This file should only be included by drivers/parport/parport_pc.c.
   7  */
   8
   9 #ifndef _ASM_I386_PARPORT_H
  10 #define _ASM_I386_PARPORT_H 1
  11
  12 #include <linux/config.h>
  13
  14 /* Maximum number of ports to support.  It is useless to set this greater
  15    than PARPORT_MAX (in <linux/parport.h>).  */
  16 #define PARPORT_PC_MAX_PORTS  8
  17
  18 /* If parport_cs (PCMCIA) is managing ports for us, we'll need the
  19  * probing routines forever; otherwise we can lose them at boot time. */
  20 #ifdef CONFIG_PARPORT_PC_PCMCIA
  21 #define __maybe_initdata
  22 #define __maybe_init
  23 #else
  24 #define __maybe_initdata __initdata
  25 #define __maybe_init __init
  26 #endif
  27
  28 static int __maybe_init parport_pc_init_pci(int irq, int dma);
  29
  30 static int user_specified __maybe_initdata = 0;
  31 int __init
  32 parport_pc_init(int *io, int *io_hi, int *irq, int *dma)
  33 {
  34         int count = 0, i = 0;
  35
  36         if (io && *io) {
  37                 /* Only probe the ports we were given. */
  38                 user_specified = 1;
  39                 do {
  40                         if (!*io_hi) *io_hi = 0x400 + *io;
  41                         if (parport_pc_probe_port(*(io++), *(io_hi++),
  42                                                   *(irq++), *(dma++)))
  43                                 count++;
  44                 } while (*io && (++i < PARPORT_PC_MAX_PORTS));
  45         } else {
  46                 /* Probe all the likely ports. */
  47                 if (parport_pc_probe_port(0x3bc, 0x7bc, irq[0], dma[0]))
  48                         count++;
  49                 if (parport_pc_probe_port(0x378, 0x778, irq[0], dma[0]))
  50                         count++;
  51                 if (parport_pc_probe_port(0x278, 0x678, irq[0], dma[0]))
  52                         count++;
  53                 count += parport_pc_init_pci (irq[0], dma[0]);
  54         }
  55
  56         return count;
  57 }
  58
  59 #endif /* !(_ASM_I386_PARPORT_H) */