drivers/sed13806.c

   1 /*
   2  * (C) Copyright 2002
   3  * Stäubli Faverges - <www.staubli.com>
   4  * Pierre AUBERT  p.aubert@staubli.com
   5  *
   6  * See file CREDITS for list of people who contributed to this
   7  * project.
   8  *
   9  * This program is free software; you can redistribute it and/or
  10  * modify it under the terms of the GNU General Public License as
  11  * published by the Free Software Foundation; either version 2 of
  12  * the License, or (at your option) any later version.
  13  *
  14  * This program is distributed in the hope that it will be useful,
  15  * but WITHOUT ANY WARRANTY; without even the implied warranty of
  16  * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
  17  * GNU General Public License for more details.
  18  *
  19  * You should have received a copy of the GNU General Public License
  20  * along with this program; if not, write to the Free Software
  21  * Foundation, Inc., 59 Temple Place, Suite 330, Boston,
  22  * MA 02111-1307 USA
  23  */
  24 /* Video support for Epson SED13806 chipset                                  */
  25
  26 #include <common.h>
  27
  28 #ifdef CONFIG_VIDEO_SED13806
  29
  30 #include <video_fb.h>
  31 #include <sed13806.h>
  32
  33 #define readByte(ptrReg)                \
  34     *(volatile unsigned char *)(sed13806.isaBase + ptrReg)
  35
  36 #define writeByte(ptrReg,value) \
  37     *(volatile unsigned char *)(sed13806.isaBase + ptrReg) = value
  38
  39 #define writeWord(ptrReg,value) \
  40     (*(volatile unsigned short *)(sed13806.isaBase + ptrReg) = ((value >> 8 ) & 0xff) | ((value << 8) & 0xff00))
  41
  42
  43 GraphicDevice sed13806;
  44
  45 /*-----------------------------------------------------------------------------
  46  * EpsonSetRegs --
  47  *-----------------------------------------------------------------------------
  48  */
  49 static void EpsonSetRegs (void)
  50 {
  51     /* the content of the chipset register depends on the board (clocks, ...)*/
  52     const S1D_REGS *preg = board_get_regs ();
  53     while (preg -> Index) {
  54         writeByte (preg -> Index, preg -> Value);
  55         preg ++;
  56     }
  57 }
  58
  59 /*-----------------------------------------------------------------------------
  60  * video_hw_init --
  61  *-----------------------------------------------------------------------------
  62  */
  63 void *video_hw_init (void)
  64 {
  65     unsigned int *vm, i;
  66
  67     memset (&sed13806, 0, sizeof (GraphicDevice));
  68
  69     /* Initialization of the access to the graphic chipset
  70        Retreive base address of the chipset
  71        (see board/RPXClassic/eccx.c)                                         */
  72     if ((sed13806.isaBase = board_video_init ()) == 0) {
  73         return (NULL);
  74     }
  75
  76     sed13806.frameAdrs = sed13806.isaBase + FRAME_BUFFER_OFFSET;
  77     sed13806.winSizeX = board_get_width ();
  78     sed13806.winSizeY = board_get_height ();
  79
  80 #if defined(CONFIG_VIDEO_SED13806_8BPP)
  81     sed13806.gdfIndex = GDF__8BIT_INDEX;
  82     sed13806.gdfBytesPP = 1;
  83
  84 #elif defined(CONFIG_VIDEO_SED13806_16BPP)
  85     sed13806.gdfIndex = GDF_16BIT_565RGB;
  86     sed13806.gdfBytesPP = 2;
  87
  88 #else
  89 #error Unsupported SED13806 BPP
  90 #endif
  91
  92     sed13806.memSize = sed13806.winSizeX * sed13806.winSizeY * sed13806.gdfBytesPP;
  93
  94     /* Load SED registers                                                    */
  95     EpsonSetRegs ();
  96
  97     /* (see board/RPXClassic/RPXClassic.c)                                   */
  98     board_validate_screen (sed13806.isaBase);
  99
 100     /* Clear video memory */
 101     i = sed13806.memSize/4;
 102     vm = (unsigned int *)sed13806.frameAdrs;
 103     while(i--)
 104         *vm++ = 0;
 105
 106
 107     return (&sed13806);
 108 }
 109 /*-----------------------------------------------------------------------------
 110  * Epson_wait_idle -- Wait for hardware to become idle
 111  *-----------------------------------------------------------------------------
 112  */
 113 static void Epson_wait_idle (void)
 114 {
 115     while (readByte (BLT_CTRL0) & 0x80);
 116
 117     /* Read a word in the BitBLT memory area to shutdown the BitBLT engine   */
 118     *(volatile unsigned short *)(sed13806.isaBase + BLT_REG);
 119 }
 120
 121 /*-----------------------------------------------------------------------------
 122  * video_hw_bitblt --
 123  *-----------------------------------------------------------------------------
 124  */
 125 void video_hw_bitblt (
 126     unsigned int bpp,             /* bytes per pixel */
 127     unsigned int src_x,           /* source pos x */
 128     unsigned int src_y,           /* source pos y */
 129     unsigned int dst_x,           /* dest pos x */
 130     unsigned int dst_y,           /* dest pos y */
 131     unsigned int dim_x,           /* frame width */
 132     unsigned int dim_y            /* frame height */
 133     )
 134 {
 135     register GraphicDevice *pGD = (GraphicDevice *)&sed13806;
 136     unsigned long       srcAddr, dstAddr;
 137     unsigned int stride = bpp * pGD -> winSizeX;
 138
 139     srcAddr = (src_y * stride) + (src_x * bpp);
 140     dstAddr = (dst_y * stride) + (dst_x * bpp);
 141
 142     Epson_wait_idle ();
 143
 144     writeByte(BLT_ROP,0x0C);    /* source */
 145     writeByte(BLT_OP,0x02);/* move blit in positive direction with ROP */
 146     writeWord(BLT_MEM_OFF0, stride / 2);
 147     if (pGD -> gdfIndex == GDF__8BIT_INDEX) {
 148         writeByte(BLT_CTRL1,0x00);
 149     }
 150     else {
 151         writeByte(BLT_CTRL1,0x01);
 152     }
 153
 154     writeWord(BLT_WIDTH0,(dim_x - 1));
 155     writeWord(BLT_HEIGHT0,(dim_y - 1));
 156
 157     /* set up blit registers                                                 */
 158     writeByte(BLT_SRC_ADDR0,srcAddr);
 159     writeByte(BLT_SRC_ADDR1,srcAddr>>8);
 160     writeByte(BLT_SRC_ADDR2,srcAddr>>16);
 161
 162     writeByte(BLT_DST_ADDR0,dstAddr);
 163     writeByte(BLT_DST_ADDR1,dstAddr>>8);
 164     writeByte(BLT_DST_ADDR2,dstAddr>>16);
 165
 166     /* Engage the blt engine                                                 */
 167     /* rectangular region for src and dst                                    */
 168     writeByte(BLT_CTRL0,0x80);
 169
 170     /* wait untill current blits finished                                    */
 171     Epson_wait_idle ();
 172 }
 173 /*-----------------------------------------------------------------------------
 174  * video_hw_rectfill --
 175  *-----------------------------------------------------------------------------
 176  */
 177 void video_hw_rectfill (
 178     unsigned int bpp,             /* bytes per pixel */
 179     unsigned int dst_x,           /* dest pos x */
 180     unsigned int dst_y,           /* dest pos y */
 181     unsigned int dim_x,           /* frame width */
 182     unsigned int dim_y,           /* frame height */
 183     unsigned int color            /* fill color */
 184      )
 185 {
 186     register GraphicDevice *pGD = (GraphicDevice *)&sed13806;
 187     unsigned long       dstAddr;
 188     unsigned int stride = bpp * pGD -> winSizeX;
 189
 190     dstAddr = (dst_y * stride) + (dst_x * bpp);
 191
 192     Epson_wait_idle ();
 193
 194     /* set up blit registers                                                 */
 195     writeByte(BLT_DST_ADDR0,dstAddr);
 196     writeByte(BLT_DST_ADDR1,dstAddr>>8);
 197     writeByte(BLT_DST_ADDR2,dstAddr>>16);
 198
 199     writeWord(BLT_WIDTH0,(dim_x - 1));
 200     writeWord(BLT_HEIGHT0,(dim_y - 1));
 201     writeWord(BLT_FGCOLOR0,color);
 202
 203     writeByte(BLT_OP,0x0C);  /* solid fill                                   */
 204     writeWord(BLT_MEM_OFF0,stride / 2);
 205
 206     if (pGD -> gdfIndex == GDF__8BIT_INDEX) {
 207         writeByte(BLT_CTRL1,0x00);
 208     }
 209     else {
 210         writeByte(BLT_CTRL1,0x01);
 211     }
 212
 213     /* Engage the blt engine                                                 */
 214     /* rectangular region for src and dst                                    */
 215     writeByte(BLT_CTRL0,0x80);
 216
 217     /* wait untill current blits finished                                    */
 218     Epson_wait_idle ();
 219 }
 220
 221 /*-----------------------------------------------------------------------------
 222  * video_set_lut --
 223  *-----------------------------------------------------------------------------
 224  */
 225 void video_set_lut (
 226     unsigned int index,           /* color number */
 227     unsigned char r,              /* red */
 228     unsigned char g,              /* green */
 229     unsigned char b               /* blue */
 230     )
 231 {
 232     writeByte(REG_LUT_ADDR, index );
 233     writeByte(REG_LUT_DATA, r);
 234     writeByte(REG_LUT_DATA, g);
 235     writeByte(REG_LUT_DATA, b);
 236 }
 237 #ifdef CONFIG_VIDEO_HW_CURSOR
 238 /*-----------------------------------------------------------------------------
 239  * video_set_hw_cursor --
 240  *-----------------------------------------------------------------------------
 241  */
 242 void video_set_hw_cursor (int x, int y)
 243 {
 244     writeByte (LCD_CURSOR_XL, (x & 0xff));
 245     writeByte (LCD_CURSOR_XM, (x >> 8));
 246     writeByte (LCD_CURSOR_YL, (y & 0xff));
 247     writeByte (LCD_CURSOR_YM, (y >> 8));
 248 }
 249
 250 /*-----------------------------------------------------------------------------
 251  * video_init_hw_cursor --
 252  *-----------------------------------------------------------------------------
 253  */
 254 void video_init_hw_cursor (int font_width, int font_height)
 255 {
 256     volatile unsigned char *ptr;
 257     unsigned char pattern;
 258     int i;
 259
 260
 261     /* Init cursor content
 262        Cursor size is 64x64 pixels
 263        Start of the cursor memory depends on panel type (dual panel ...)     */
 264     if ((i = readByte (LCD_CURSOR_START)) == 0) {
 265         ptr = (unsigned char *)(sed13806.frameAdrs + DEFAULT_VIDEO_MEMORY_SIZE - HWCURSORSIZE);
 266     }
 267     else {
 268         ptr = (unsigned char *)(sed13806.frameAdrs + DEFAULT_VIDEO_MEMORY_SIZE - (i * 8192));
 269     }
 270
 271     /* Fill the first line and the first empty line after cursor             */
 272     for (i = 0, pattern = 0; i < 64; i++) {
 273         if (i < font_width) {
 274             /* Invert background                                             */
 275             pattern |= 0x3;
 276
 277         }
 278         else {
 279             /* Background                                                    */
 280             pattern |= 0x2;
 281         }
 282         if ((i & 3) == 3) {
 283             *ptr = pattern;
 284             *(ptr + font_height * 16) = 0xaa;
 285             ptr ++;
 286             pattern = 0;
 287         }
 288         pattern <<= 2;
 289     }
 290
 291     /* Duplicate this line                                                   */
 292     for (i = 1; i < font_height; i++) {
 293         memcpy ((void *)ptr, (void *)(ptr - 16), 16);
 294         ptr += 16;
 295     }
 296
 297     for (; i < 64; i++) {
 298         memcpy ((void *)(ptr + 16), (void *)ptr, 16);
 299         ptr += 16;
 300     }
 301
 302     /* Select cursor mode                                                    */
 303     writeByte (LCD_CURSOR_CNTL, 1);
 304 }
 305 #endif
 306 #endif