drivers/video/sed13806.c

   1 /*
   2  * (C) Copyright 2002
   3  * Stäubli Faverges - <www.staubli.com>
   4  * Pierre AUBERT  p.aubert@staubli.com
   5  *
   6  * SPDX-License-Identifier:     GPL-2.0+
   7  */
   8 /* Video support for Epson SED13806 chipset                                  */
   9
  10 #include <common.h>
  11
  12 #include <video_fb.h>
  13 #include <sed13806.h>
  14
  15 #define readByte(ptrReg)                \
  16     *(volatile unsigned char *)(sed13806.isaBase + ptrReg)
  17
  18 #define writeByte(ptrReg,value) \
  19     *(volatile unsigned char *)(sed13806.isaBase + ptrReg) = value
  20
  21 #define writeWord(ptrReg,value) \
  22     (*(volatile unsigned short *)(sed13806.isaBase + ptrReg) = ((value >> 8 ) & 0xff) | ((value << 8) & 0xff00))
  23
  24 GraphicDevice sed13806;
  25
  26 /*-----------------------------------------------------------------------------
  27  * EpsonSetRegs --
  28  *-----------------------------------------------------------------------------
  29  */
  30 static void EpsonSetRegs (void)
  31 {
  32     /* the content of the chipset register depends on the board (clocks, ...)*/
  33     const S1D_REGS *preg = board_get_regs ();
  34     while (preg -> Index) {
  35         writeByte (preg -> Index, preg -> Value);
  36         preg ++;
  37     }
  38 }
  39
  40 /*-----------------------------------------------------------------------------
  41  * video_hw_init --
  42  *-----------------------------------------------------------------------------
  43  */
  44 void *video_hw_init (void)
  45 {
  46     unsigned int *vm, i;
  47
  48     memset (&sed13806, 0, sizeof (GraphicDevice));
  49
  50     /* Initialization of the access to the graphic chipset
  51        Retreive base address of the chipset
  52        (see board/RPXClassic/eccx.c)                                         */
  53     if ((sed13806.isaBase = board_video_init ()) == 0) {
  54         return (NULL);
  55     }
  56
  57     sed13806.frameAdrs = sed13806.isaBase + FRAME_BUFFER_OFFSET;
  58     sed13806.winSizeX = board_get_width ();
  59     sed13806.winSizeY = board_get_height ();
  60
  61 #if defined(CONFIG_VIDEO_SED13806_8BPP)
  62     sed13806.gdfIndex = GDF__8BIT_INDEX;
  63     sed13806.gdfBytesPP = 1;
  64
  65 #elif defined(CONFIG_VIDEO_SED13806_16BPP)
  66     sed13806.gdfIndex = GDF_16BIT_565RGB;
  67     sed13806.gdfBytesPP = 2;
  68
  69 #else
  70 #error Unsupported SED13806 BPP
  71 #endif
  72
  73     sed13806.memSize = sed13806.winSizeX * sed13806.winSizeY * sed13806.gdfBytesPP;
  74
  75     /* Load SED registers                                                    */
  76     EpsonSetRegs ();
  77
  78     /* (see board/RPXClassic/RPXClassic.c)                                   */
  79     board_validate_screen (sed13806.isaBase);
  80
  81     /* Clear video memory */
  82     i = sed13806.memSize/4;
  83     vm = (unsigned int *)sed13806.frameAdrs;
  84     while(i--)
  85         *vm++ = 0;
  86
  87
  88     return (&sed13806);
  89 }
  90 /*-----------------------------------------------------------------------------
  91  * Epson_wait_idle -- Wait for hardware to become idle
  92  *-----------------------------------------------------------------------------
  93  */
  94 static void Epson_wait_idle (void)
  95 {
  96     while (readByte (BLT_CTRL0) & 0x80);
  97
  98     /* Read a word in the BitBLT memory area to shutdown the BitBLT engine   */
  99     *(volatile unsigned short *)(sed13806.isaBase + BLT_REG);
 100 }
 101
 102 /*-----------------------------------------------------------------------------
 103  * video_hw_bitblt --
 104  *-----------------------------------------------------------------------------
 105  */
 106 void video_hw_bitblt (
 107     unsigned int bpp,             /* bytes per pixel */
 108     unsigned int src_x,           /* source pos x */
 109     unsigned int src_y,           /* source pos y */
 110     unsigned int dst_x,           /* dest pos x */
 111     unsigned int dst_y,           /* dest pos y */
 112     unsigned int dim_x,           /* frame width */
 113     unsigned int dim_y            /* frame height */
 114     )
 115 {
 116     register GraphicDevice *pGD = (GraphicDevice *)&sed13806;
 117     unsigned long       srcAddr, dstAddr;
 118     unsigned int stride = bpp * pGD -> winSizeX;
 119
 120     srcAddr = (src_y * stride) + (src_x * bpp);
 121     dstAddr = (dst_y * stride) + (dst_x * bpp);
 122
 123     Epson_wait_idle ();
 124
 125     writeByte(BLT_ROP,0x0C);    /* source */
 126     writeByte(BLT_OP,0x02);/* move blit in positive direction with ROP */
 127     writeWord(BLT_MEM_OFF0, stride / 2);
 128     if (pGD -> gdfIndex == GDF__8BIT_INDEX) {
 129         writeByte(BLT_CTRL1,0x00);
 130     }
 131     else {
 132         writeByte(BLT_CTRL1,0x01);
 133     }
 134
 135     writeWord(BLT_WIDTH0,(dim_x - 1));
 136     writeWord(BLT_HEIGHT0,(dim_y - 1));
 137
 138     /* set up blit registers                                                 */
 139     writeByte(BLT_SRC_ADDR0,srcAddr);
 140     writeByte(BLT_SRC_ADDR1,srcAddr>>8);
 141     writeByte(BLT_SRC_ADDR2,srcAddr>>16);
 142
 143     writeByte(BLT_DST_ADDR0,dstAddr);
 144     writeByte(BLT_DST_ADDR1,dstAddr>>8);
 145     writeByte(BLT_DST_ADDR2,dstAddr>>16);
 146
 147     /* Engage the blt engine                                                 */
 148     /* rectangular region for src and dst                                    */
 149     writeByte(BLT_CTRL0,0x80);
 150
 151     /* wait untill current blits finished                                    */
 152     Epson_wait_idle ();
 153 }
 154 /*-----------------------------------------------------------------------------
 155  * video_hw_rectfill --
 156  *-----------------------------------------------------------------------------
 157  */
 158 void video_hw_rectfill (
 159     unsigned int bpp,             /* bytes per pixel */
 160     unsigned int dst_x,           /* dest pos x */
 161     unsigned int dst_y,           /* dest pos y */
 162     unsigned int dim_x,           /* frame width */
 163     unsigned int dim_y,           /* frame height */
 164     unsigned int color            /* fill color */
 165      )
 166 {
 167     register GraphicDevice *pGD = (GraphicDevice *)&sed13806;
 168     unsigned long       dstAddr;
 169     unsigned int stride = bpp * pGD -> winSizeX;
 170
 171     dstAddr = (dst_y * stride) + (dst_x * bpp);
 172
 173     Epson_wait_idle ();
 174
 175     /* set up blit registers                                                 */
 176     writeByte(BLT_DST_ADDR0,dstAddr);
 177     writeByte(BLT_DST_ADDR1,dstAddr>>8);
 178     writeByte(BLT_DST_ADDR2,dstAddr>>16);
 179
 180     writeWord(BLT_WIDTH0,(dim_x - 1));
 181     writeWord(BLT_HEIGHT0,(dim_y - 1));
 182     writeWord(BLT_FGCOLOR0,color);
 183
 184     writeByte(BLT_OP,0x0C);  /* solid fill                                   */
 185     writeWord(BLT_MEM_OFF0,stride / 2);
 186
 187     if (pGD -> gdfIndex == GDF__8BIT_INDEX) {
 188         writeByte(BLT_CTRL1,0x00);
 189     }
 190     else {
 191         writeByte(BLT_CTRL1,0x01);
 192     }
 193
 194     /* Engage the blt engine                                                 */
 195     /* rectangular region for src and dst                                    */
 196     writeByte(BLT_CTRL0,0x80);
 197
 198     /* wait untill current blits finished                                    */
 199     Epson_wait_idle ();
 200 }
 201
 202 /*-----------------------------------------------------------------------------
 203  * video_set_lut --
 204  *-----------------------------------------------------------------------------
 205  */
 206 void video_set_lut (
 207     unsigned int index,           /* color number */
 208     unsigned char r,              /* red */
 209     unsigned char g,              /* green */
 210     unsigned char b               /* blue */
 211     )
 212 {
 213     writeByte(REG_LUT_ADDR, index );
 214     writeByte(REG_LUT_DATA, r);
 215     writeByte(REG_LUT_DATA, g);
 216     writeByte(REG_LUT_DATA, b);
 217 }
 218 #ifdef CONFIG_VIDEO_HW_CURSOR
 219 /*-----------------------------------------------------------------------------
 220  * video_set_hw_cursor --
 221  *-----------------------------------------------------------------------------
 222  */
 223 void video_set_hw_cursor (int x, int y)
 224 {
 225     writeByte (LCD_CURSOR_XL, (x & 0xff));
 226     writeByte (LCD_CURSOR_XM, (x >> 8));
 227     writeByte (LCD_CURSOR_YL, (y & 0xff));
 228     writeByte (LCD_CURSOR_YM, (y >> 8));
 229 }
 230
 231 /*-----------------------------------------------------------------------------
 232  * video_init_hw_cursor --
 233  *-----------------------------------------------------------------------------
 234  */
 235 void video_init_hw_cursor (int font_width, int font_height)
 236 {
 237     volatile unsigned char *ptr;
 238     unsigned char pattern;
 239     int i;
 240
 241
 242     /* Init cursor content
 243        Cursor size is 64x64 pixels
 244        Start of the cursor memory depends on panel type (dual panel ...)     */
 245     if ((i = readByte (LCD_CURSOR_START)) == 0) {
 246         ptr = (unsigned char *)(sed13806.frameAdrs + DEFAULT_VIDEO_MEMORY_SIZE - HWCURSORSIZE);
 247     }
 248     else {
 249         ptr = (unsigned char *)(sed13806.frameAdrs + DEFAULT_VIDEO_MEMORY_SIZE - (i * 8192));
 250     }
 251
 252     /* Fill the first line and the first empty line after cursor             */
 253     for (i = 0, pattern = 0; i < 64; i++) {
 254         if (i < font_width) {
 255             /* Invert background                                             */
 256             pattern |= 0x3;
 257
 258         }
 259         else {
 260             /* Background                                                    */
 261             pattern |= 0x2;
 262         }
 263         if ((i & 3) == 3) {
 264             *ptr = pattern;
 265             *(ptr + font_height * 16) = 0xaa;
 266             ptr ++;
 267             pattern = 0;
 268         }
 269         pattern <<= 2;
 270     }
 271
 272     /* Duplicate this line                                                   */
 273     for (i = 1; i < font_height; i++) {
 274         memcpy ((void *)ptr, (void *)(ptr - 16), 16);
 275         ptr += 16;
 276     }
 277
 278     for (; i < 64; i++) {
 279         memcpy ((void *)(ptr + 16), (void *)ptr, 16);
 280         ptr += 16;
 281     }
 282
 283     /* Select cursor mode                                                    */
 284     writeByte (LCD_CURSOR_CNTL, 1);
 285 }
 286 #endif