git.sur5r.net Git - cc65/blob - libsrc/tgi/tgi_load_driver.c

   1 /*****************************************************************************/
   2 /*                                                                           */
   3 /*                             tgi_load_driver.c                             */
   4 /*                                                                           */
   5 /*                       Loader module for TGI drivers                       */
   6 /*                                                                           */
   7 /*                                                                           */
   8 /*                                                                           */
   9 /* (C) 2002-2009, Ullrich von Bassewitz                                      */
  10 /*                Roemerstrasse 52                                           */
  11 /*                D-70794 Filderstadt                                        */
  12 /* EMail:         uz@cc65.org                                                */
  13 /*                                                                           */
  14 /*                                                                           */
  15 /* This software is provided 'as-is', without any expressed or implied       */
  16 /* warranty.  In no event will the authors be held liable for any damages    */
  17 /* arising from the use of this software.                                    */
  18 /*                                                                           */
  19 /* Permission is granted to anyone to use this software for any purpose,     */
  20 /* including commercial applications, and to alter it and redistribute it    */
  21 /* freely, subject to the following restrictions:                            */
  22 /*                                                                           */
  23 /* 1. The origin of this software must not be misrepresented; you must not   */
  24 /*    claim that you wrote the original software. If you use this software   */
  25 /*    in a product, an acknowledgment in the product documentation would be  */
  26 /*    appreciated but is not required.                                       */
  27 /* 2. Altered source versions must be plainly marked as such, and must not   */
  28 /*    be misrepresented as being the original software.                      */
  29 /* 3. This notice may not be removed or altered from any source              */
  30 /*    distribution.                                                          */
  31 /*                                                                           */
  32 /*****************************************************************************/
  33
  34
  35
  36 #include <unistd.h>
  37 #include <fcntl.h>
  38 #include <modload.h>
  39 #include <tgi.h>
  40 #include <tgi/tgi-kernel.h>
  41
  42
  43
  44 /*****************************************************************************/
  45 /*                                   Code                                    */
  46 /*****************************************************************************/
  47
  48
  49
  50 void __fastcall__ tgi_load_driver (const char* name)
  51 /* Install the given driver. This function is identical to tgi_load with the
  52  * only difference that the name of the driver is specified explicitly. You
  53  * should NOT use this function in most cases, use tgi_load() instead.
  54  */
  55 {
  56     static struct mod_ctrl ctrl = {
  57         read            /* Read from disk */
  58     };
  59     unsigned Res;
  60
  61     /* Check if we do already have a driver loaded. If so, remove it. */
  62     if (tgi_drv != 0) {
  63         tgi_unload ();
  64     }
  65
  66     /* Now open the file */
  67     ctrl.callerdata = open (name, O_RDONLY);
  68     if (ctrl.callerdata >= 0) {
  69
  70         /* Load the module */
  71         Res = mod_load (&ctrl);
  72
  73         /* Close the input file */
  74         close (ctrl.callerdata);
  75
  76         /* Check the return code */
  77         if (Res == MLOAD_OK) {
  78
  79             /* Check the driver signature, install the driver */
  80             tgi_install (ctrl.module);
  81             return;
  82
  83         }
  84     }
  85
  86     /* Error loading the driver */
  87     tgi_error = TGI_ERR_CANNOT_LOAD;
  88 }