drivers/sm501.c

   1 /*
   2  * (C) Copyright 2002
   3  * Stäubli Faverges - <www.staubli.com>
   4  * Pierre AUBERT  p.aubert@staubli.com
   5  *
   6  * (C) Copyright 2005
   7  * Martin Krause TQ-Systems GmbH martin.krause@tqs.de
   8  *
   9  * See file CREDITS for list of people who contributed to this
  10  * project.
  11  *
  12  * This program is free software; you can redistribute it and/or
  13  * modify it under the terms of the GNU General Public License as
  14  * published by the Free Software Foundation; either version 2 of
  15  * the License, or (at your option) any later version.
  16  *
  17  * This program is distributed in the hope that it will be useful,
  18  * but WITHOUT ANY WARRANTY; without even the implied warranty of
  19  * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
  20  * GNU General Public License for more details.
  21  *
  22  * You should have received a copy of the GNU General Public License
  23  * along with this program; if not, write to the Free Software
  24  * Foundation, Inc., 59 Temple Place, Suite 330, Boston,
  25  * MA 02111-1307 USA
  26  */
  27
  28 /*
  29  * Basic video support for SMI SM501 "Voyager" graphic controller
  30  */
  31
  32 #include <common.h>
  33
  34 #ifdef CONFIG_VIDEO_SM501
  35
  36 #include <video_fb.h>
  37 #include <sm501.h>
  38
  39 #define read8(ptrReg)                \
  40     *(volatile unsigned char *)(sm501.isaBase + ptrReg)
  41
  42 #define write8(ptrReg,value) \
  43     *(volatile unsigned char *)(sm501.isaBase + ptrReg) = value
  44
  45 #define read16(ptrReg) \
  46     (*(volatile unsigned short *)(sm501.isaBase + ptrReg))
  47
  48 #define write16(ptrReg,value) \
  49     (*(volatile unsigned short *)(sm501.isaBase + ptrReg) = value)
  50
  51 #define read32(ptrReg) \
  52     (*(volatile unsigned int *)(sm501.isaBase + ptrReg))
  53
  54 #define write32(ptrReg, value) \
  55     (*(volatile unsigned int *)(sm501.isaBase + ptrReg) = value)
  56
  57 GraphicDevice sm501;
  58
  59 /*-----------------------------------------------------------------------------
  60  * SmiSetRegs --
  61  *-----------------------------------------------------------------------------
  62  */
  63 static void SmiSetRegs (void)
  64 {
  65         /*
  66          * The content of the chipset register depends on the board (clocks,
  67          * ...)
  68          */
  69         const SMI_REGS *preg = board_get_regs ();
  70         while (preg->Index) {
  71                 write32 (preg->Index, preg->Value);
  72                 /*
  73                  * Insert a delay between
  74                  */
  75                 udelay (1000);
  76                 preg ++;
  77         }
  78 }
  79
  80 /*-----------------------------------------------------------------------------
  81  * video_hw_init --
  82  *-----------------------------------------------------------------------------
  83  */
  84 void *video_hw_init (void)
  85 {
  86         unsigned int *vm, i;
  87
  88         memset (&sm501, 0, sizeof (GraphicDevice));
  89
  90         /*
  91          * Initialization of the access to the graphic chipset Retreive base
  92          * address of the chipset (see board/RPXClassic/eccx.c)
  93          */
  94         if ((sm501.isaBase = board_video_init ()) == 0) {
  95                 return (NULL);
  96         }
  97
  98         if ((sm501.frameAdrs = board_video_get_fb ()) == 0) {
  99                 return (NULL);
 100         }
 101
 102         sm501.winSizeX = board_get_width ();
 103         sm501.winSizeY = board_get_height ();
 104
 105 #if defined(CONFIG_VIDEO_SM501_8BPP)
 106         sm501.gdfIndex = GDF__8BIT_INDEX;
 107         sm501.gdfBytesPP = 1;
 108
 109 #elif defined(CONFIG_VIDEO_SM501_16BPP)
 110         sm501.gdfIndex = GDF_16BIT_565RGB;
 111         sm501.gdfBytesPP = 2;
 112
 113 #elif defined(CONFIG_VIDEO_SM501_32BPP)
 114         sm501.gdfIndex = GDF_32BIT_X888RGB;
 115         sm501.gdfBytesPP = 4;
 116 #else
 117 #error Unsupported SM501 BPP
 118 #endif
 119
 120         sm501.memSize = sm501.winSizeX * sm501.winSizeY * sm501.gdfBytesPP;
 121
 122         /* Load Smi registers */
 123         SmiSetRegs ();
 124
 125         /* (see board/RPXClassic/RPXClassic.c) */
 126         board_validate_screen (sm501.isaBase);
 127
 128         /* Clear video memory */
 129         i = sm501.memSize/4;
 130         vm = (unsigned int *)sm501.frameAdrs;
 131         while(i--)
 132                 *vm++ = 0;
 133
 134         return (&sm501);
 135 }
 136
 137 /*-----------------------------------------------------------------------------
 138  * video_set_lut --
 139  *-----------------------------------------------------------------------------
 140  */
 141 void video_set_lut (
 142         unsigned int index,           /* color number */
 143         unsigned char r,              /* red */
 144         unsigned char g,              /* green */
 145         unsigned char b               /* blue */
 146         )
 147 {
 148 }
 149
 150 #endif /* CONFIG_VIDEO_SM501 */