LXR uboot/drivers/video/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#include <video_fb.h>
  35#include <sm501.h>
  36
  37#define read8(ptrReg)                \
  38    *(volatile unsigned char *)(sm501.isaBase + ptrReg)
  39
  40#define write8(ptrReg,value) \
  41    *(volatile unsigned char *)(sm501.isaBase + ptrReg) = value
  42
  43#define read16(ptrReg) \
  44    (*(volatile unsigned short *)(sm501.isaBase + ptrReg))
  45
  46#define write16(ptrReg,value) \
  47    (*(volatile unsigned short *)(sm501.isaBase + ptrReg) = value)
  48
  49#define read32(ptrReg) \
  50    (*(volatile unsigned int *)(sm501.isaBase + ptrReg))
  51
  52#define write32(ptrReg, value) \
  53    (*(volatile unsigned int *)(sm501.isaBase + ptrReg) = value)
  54
  55GraphicDevice sm501;
  56
  57/*-----------------------------------------------------------------------------
  58 * SmiSetRegs --
  59 *-----------------------------------------------------------------------------
  60 */
  61static void SmiSetRegs (void)
  62{
  63        /*
  64         * The content of the chipset register depends on the board (clocks,
  65         * ...)
  66         */
  67        const SMI_REGS *preg = board_get_regs ();
  68        while (preg->Index) {
  69                write32 (preg->Index, preg->Value);
  70                /*
  71                 * Insert a delay between
  72                 */
  73                udelay (1000);
  74                preg ++;
  75        }
  76}
  77
  78/*-----------------------------------------------------------------------------
  79 * video_hw_init --
  80 *-----------------------------------------------------------------------------
  81 */
  82void *video_hw_init (void)
  83{
  84        unsigned int *vm, i;
  85
  86        memset (&sm501, 0, sizeof (GraphicDevice));
  87
  88        /*
  89         * Initialization of the access to the graphic chipset Retreive base
  90         * address of the chipset (see board/RPXClassic/eccx.c)
  91         */
  92        if ((sm501.isaBase = board_video_init ()) == 0) {
  93                return (NULL);
  94        }
  95
  96        if ((sm501.frameAdrs = board_video_get_fb ()) == 0) {
  97                return (NULL);
  98        }
  99
 100        sm501.winSizeX = board_get_width ();
 101        sm501.winSizeY = board_get_height ();
 102
 103#if defined(CONFIG_VIDEO_SM501_8BPP)
 104        sm501.gdfIndex = GDF__8BIT_INDEX;
 105        sm501.gdfBytesPP = 1;
 106
 107#elif defined(CONFIG_VIDEO_SM501_16BPP)
 108        sm501.gdfIndex = GDF_16BIT_565RGB;
 109        sm501.gdfBytesPP = 2;
 110
 111#elif defined(CONFIG_VIDEO_SM501_32BPP)
 112        sm501.gdfIndex = GDF_32BIT_X888RGB;
 113        sm501.gdfBytesPP = 4;
 114#else
 115#error Unsupported SM501 BPP
 116#endif
 117
 118        sm501.memSize = sm501.winSizeX * sm501.winSizeY * sm501.gdfBytesPP;
 119
 120        /* Load Smi registers */
 121        SmiSetRegs ();
 122
 123        /* (see board/RPXClassic/RPXClassic.c) */
 124        board_validate_screen (sm501.isaBase);
 125
 126        /* Clear video memory */
 127        i = sm501.memSize/4;
 128        vm = (unsigned int *)sm501.frameAdrs;
 129        while(i--)
 130                *vm++ = 0;
 131
 132        return (&sm501);
 133}
 134
 135/*-----------------------------------------------------------------------------
 136 * video_set_lut --
 137 *-----------------------------------------------------------------------------
 138 */
 139void video_set_lut (
 140        unsigned int index,           /* color number */
 141        unsigned char r,              /* red */
 142        unsigned char g,              /* green */
 143        unsigned char b               /* blue */
 144        )
 145{
 146}
 147