kernel/include/dev.h

   1 /*
   2  *  ZeX/OS
   3  *  Copyright (C) 2007  Tomas 'ZeXx86' Jedrzejek (zexx86@zexos.org)
   4  *  Copyright (C) 2009  Tomas 'ZeXx86' Jedrzejek (zexx86@zexos.org)
   5  *
   6  *  This program is free software: you can redistribute it and/or modify
   7  *  it under the terms of the GNU General Public License as published by
   8  *  the Free Software Foundation, either version 3 of the License, or
   9  *  (at your option) any later version.
  10  *
  11  *  This program is distributed in the hope that it will be useful,
  12  *  but WITHOUT ANY WARRANTY; without even the implied warranty of
  13  *  MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
  14  *  GNU General Public License for more details.
  15  *
  16  *  You should have received a copy of the GNU General Public License
  17  *  along with this program.  If not, see <http://www.gnu.org/licenses/>.
  18  */
  19
  20
  21 #ifndef _DEV_H
  22 #define _DEV_H
  23
  24 #define DEFAULT_MAX_DEVNLENGTH          15
  25 #define DEFAULT_MAX_DESCLENGTH          20
  26
  27 #define DEV_ACT_INIT            0x1
  28 #define DEV_ACT_READ            0x2
  29 #define DEV_ACT_WRITE           0x4
  30 #define DEV_ACT_RESET           0x8
  31 #define DEV_ACT_STOP            0x10
  32 #define DEV_ACT_MOUNT           0x20
  33 #define DEV_ACT_PLAY            0x20
  34 #define DEV_ACT_UPDATE          0x40
  35 #define DEV_ACT_UMOUNT          0x80
  36
  37 #define DEV_ATTR_BLOCK          0x1
  38 #define DEV_ATTR_CHAR           0x2
  39 #define DEV_ATTR_SPECIAL        0x4
  40 #define DEV_ATTR_NET            0x8
  41 #define DEV_ATTR_SOUND          0x10
  42
  43 typedef bool (dev_handler_t) (unsigned act, ...);
  44
  45 /* Device structure */
  46 typedef struct dev_context {
  47         struct dev_context *next, *prev;
  48
  49         char devname[DEFAULT_MAX_DEVNLENGTH];
  50         char desc[DEFAULT_MAX_DESCLENGTH];
  51         unsigned attrib;
  52         dev_handler_t *handler;
  53 } dev_t;
  54
  55 typedef struct {
  56         void *iomem;
  57         unsigned iolen;
  58 } dev_flags_t;
  59
  60 /* externs */
  61 extern void dev_display ();
  62 extern dev_t *dev_find (char *devname);
  63 extern bool dev_handler (dev_t *dev, unsigned act, ...);
  64 extern dev_t *dev_register (char *devname, char *desc, unsigned attrib, dev_handler_t *handler);
  65 extern unsigned int init_dev ();
  66
  67 #endif
  68