board/BuS/EB+MCF-EV123/VCxK.c

   1 /*
   2  * (C) Copyright 2005
   3  * BuS Elektronik GmbH & Co.KG <esw@bus-elektonik.de>
   4  *
   5  * See file CREDITS for list of people who contributed to this
   6  * project.
   7  *
   8  * This program is free software; you can redistribute it and/or
   9  * modify it under the terms of the GNU General Public License as
  10  * published by the Free Software Foundation; either version 2 of
  11  * the License, or (at your option) any later version.
  12  *
  13  * This program is distributed in the hope that it will be useful,
  14  * but WITHOUT ANY WARRANTY; without even the implied warranty of
  15  * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
  16  * GNU General Public License for more details.
  17  *
  18  * You should have received a copy of the GNU General Public License
  19  * along with this program; if not, write to the Free Software
  20  * Foundation, Inc., 59 Temple Place, Suite 330, Boston,
  21  * MA 02111-1307 USA
  22  */
  23
  24 #include <common.h>
  25 #include <asm/m5282.h>
  26 #include "VCxK.h"
  27
  28 vu_char *vcxk_bws = (vu_char *)(CFG_CS3_BASE);
  29 #define VCXK_BWS vcxk_bws
  30
  31 static ulong vcxk_driver;
  32
  33
  34 ulong search_vcxk_driver(void);
  35 void vcxk_cls(void);
  36 void vcxk_setbrightness(short brightness);
  37 int vcxk_request(void);
  38 int vcxk_acknowledge_wait(void);
  39 void vcxk_clear(void);
  40
  41 int init_vcxk(void)
  42 {
  43         VIDEO_Invert_CFG &= ~VIDEO_Invert_IO;
  44         VIDEO_INVERT_PORT |= VIDEO_INVERT_PIN;
  45         VIDEO_INVERT_DDR  |= VIDEO_INVERT_PIN;
  46
  47         VIDEO_REQUEST_PORT |= VIDEO_REQUEST_PIN;
  48         VIDEO_REQUEST_DDR |= VIDEO_REQUEST_PIN;
  49
  50         VIDEO_ACKNOWLEDGE_DDR &= ~VIDEO_ACKNOWLEDGE_PIN;
  51
  52         vcxk_driver = search_vcxk_driver();
  53         if (vcxk_driver)
  54         {
  55                 /* use flash resist driver */
  56         }
  57         else
  58         {
  59                 vcxk_cls();
  60                 vcxk_cls();
  61                 vcxk_setbrightness(1000);
  62         }
  63         VIDEO_ENABLE_DDR |= VIDEO_ENABLE_PIN;
  64         VIDEO_ENABLE_PORT |= VIDEO_ENABLE_PIN;
  65         VIDEO_ENABLE_PORT &= ~VIDEO_ENABLE_PIN;
  66         return 1;
  67 }
  68
  69 void    vcxk_loadimage(ulong source)
  70 {
  71         int cnt;
  72         vcxk_acknowledge_wait();
  73         for (cnt=0; cnt<16384; cnt++)
  74         {
  75                 VCXK_BWS[cnt*2] = (*(vu_char*) source);
  76                 source++;
  77         }
  78         vcxk_request();
  79 }
  80
  81 void vcxk_cls(void)
  82 {
  83         vcxk_acknowledge_wait();
  84         vcxk_clear();
  85         vcxk_request();
  86 }
  87
  88 void vcxk_clear(void)
  89 {
  90         int cnt;
  91         for (cnt=0; cnt<16384; cnt++)
  92         {
  93                 VCXK_BWS[cnt*2] = 0x00;
  94         }
  95 }
  96
  97 void vcxk_setbrightness(short brightness)
  98 {
  99         VCXK_BWS[0x8000]=(brightness >> 4) +2;
 100         VCXK_BWS[0xC000]= (brightness + 23) >> 8;
 101         VCXK_BWS[0xC001]= (brightness + 23) & 0xFF;
 102 }
 103
 104 int vcxk_request(void)
 105 {
 106         if (vcxk_driver)
 107         {
 108                 /* use flash resist driver */
 109         }
 110         else
 111         {
 112                 VIDEO_REQUEST_PORT &= ~VIDEO_REQUEST_PIN;
 113                 VIDEO_REQUEST_PORT |= VIDEO_REQUEST_PIN;
 114         }
 115         return 1;
 116 }
 117
 118 int vcxk_acknowledge_wait(void)
 119 {
 120         if (vcxk_driver)
 121         {
 122                 /* use flash resist driver */
 123         }
 124         else
 125         {
 126                 while (!(VIDEO_ACKNOWLEDGE_PORT & VIDEO_ACKNOWLEDGE_PIN));
 127         }
 128         return 1;
 129 }
 130
 131 ulong search_vcxk_driver(void)
 132 {
 133         return 0;
 134 }
 135
 136 /* eof */