1 /*****************************************************************************/
5 /* Loader module for TGI drivers */
9 /* (C) 2002 Ullrich von Bassewitz */
11 /* D-70597 Stuttgart */
12 /* EMail: uz@musoftware.de */
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. */
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: */
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 */
32 /*****************************************************************************/
40 #include <tgi/tgi-kernel.h>
44 void __fastcall__ tgi_load (unsigned char mode)
45 /* Install the matching driver for the given mode. Will just load the driver
46 * and check if loading was successul. Will not switch to gaphics mode.
49 const char* name = tgi_map_mode (mode);
51 /* No driver for this mode */
52 tgi_error = TGI_ERR_NO_DRIVER;
55 tgi_load_driver (name);
61 void __fastcall__ tgi_load_driver (const char* name)
62 /* Install the given driver. This function is identical to tgi_load with the
63 * only difference that the name of the driver is specified explicitly. You
64 * should NOT use this function in most cases, use tgi_load() instead.
67 static const unsigned char marker[4] = { 0x74, 0x67, 0x69, 0x00 };
69 static struct mod_ctrl ctrl = {
70 read /* Read from disk */
74 /* Check if we do already have a driver loaded. If so, remove it. */
79 /* Now open the file */
80 ctrl.callerdata = open (name, O_RDONLY);
81 if (ctrl.callerdata < 0) {
82 tgi_error = TGI_ERR_CANNOT_LOAD;
87 Res = mod_load (&ctrl);
89 /* Close the input file */
90 close (ctrl.callerdata);
92 /* Check the return code */
93 if (Res == MLOAD_OK) {
95 /* Get a pointer to the loaded driver */
96 tgi_drv = (tgi_drv_header*) ctrl.module;
98 /* Check the header */
99 if (memcmp (tgi_drv, marker, sizeof (marker)) != 0) {
103 tgi_error = TGI_ERR_INV_DRIVER;
105 /* Driver is ok do setup */
111 /* Error loading the driver */
112 tgi_error = TGI_ERR_CANNOT_LOAD;