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  1. /*
  2.  * Copyright (c) 2008 Martin Decky
  3.  * Copyright (c) 2006 Ondrej Palkovsky
  4.  * All rights reserved.
  5.  *
  6.  * Redistribution and use in source and binary forms, with or without
  7.  * modification, are permitted provided that the following conditions
  8.  * are met:
  9.  *
  10.  * - Redistributions of source code must retain the above copyright
  11.  *   notice, this list of conditions and the following disclaimer.
  12.  * - Redistributions in binary form must reproduce the above copyright
  13.  *   notice, this list of conditions and the following disclaimer in the
  14.  *   documentation and/or other materials provided with the distribution.
  15.  * - The name of the author may not be used to endorse or promote products
  16.  *   derived from this software without specific prior written permission.
  17.  *
  18.  * THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``AS IS'' AND ANY EXPRESS OR
  19.  * IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES
  20.  * OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED.
  21.  * IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR ANY DIRECT, INDIRECT,
  22.  * INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT
  23.  * NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
  24.  * DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
  25.  * THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
  26.  * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF
  27.  * THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
  28.  */
  29.  
  30. /** @addtogroup genarch
  31.  * @{
  32.  */
  33. /** @file
  34.  */
  35.  
  36. #include <genarch/fb/font-8x16.h>
  37. #include <genarch/fb/logo-196x66.h>
  38. #include <genarch/fb/visuals.h>
  39. #include <genarch/fb/fb.h>
  40. #include <console/chardev.h>
  41. #include <console/console.h>
  42. #include <sysinfo/sysinfo.h>
  43. #include <mm/slab.h>
  44. #include <align.h>
  45. #include <panic.h>
  46. #include <memstr.h>
  47. #include <config.h>
  48. #include <bitops.h>
  49. #include <print.h>
  50. #include <ddi/ddi.h>
  51. #include <arch/types.h>
  52.  
  53. SPINLOCK_INITIALIZE(fb_lock);
  54.  
  55. /**< Physical memory area for fb. */
  56. static parea_t fb_parea;
  57.  
  58. static uint8_t *fb_addr;
  59. static uint8_t *backbuf;
  60. static uint8_t *glyphs;
  61. static uint8_t *bgscan;
  62.  
  63. static unsigned int xres;
  64. static unsigned int yres;
  65.  
  66. static unsigned int ylogo;
  67. static unsigned int ytrim;
  68. static unsigned int rowtrim;
  69.  
  70. static unsigned int scanline;
  71. static unsigned int glyphscanline;
  72.  
  73. static unsigned int pixelbytes;
  74. static unsigned int glyphbytes;
  75. static unsigned int bgscanbytes;
  76.  
  77. static unsigned int cols;
  78. static unsigned int rows;
  79. static unsigned int position = 0;
  80.  
  81. #define BG_COLOR     0x000080
  82. #define FG_COLOR     0xffff00
  83.  
  84. #define CURSOR       219
  85.  
  86. #define RED(x, bits)         ((x >> (8 + 8 + 8 - bits)) & ((1 << bits) - 1))
  87. #define GREEN(x, bits)       ((x >> (8 + 8 - bits)) & ((1 << bits) - 1))
  88. #define BLUE(x, bits)        ((x >> (8 - bits)) & ((1 << bits) - 1))
  89.  
  90. #define COL2X(col)           ((col) * FONT_WIDTH)
  91. #define ROW2Y(row)           ((row) * FONT_SCANLINES)
  92.  
  93. #define X2COL(x)             ((x) / FONT_WIDTH)
  94. #define Y2ROW(y)             ((y) / FONT_SCANLINES)
  95.  
  96. #define FB_POS(x, y)         ((y) * scanline + (x) * pixelbytes)
  97. #define BB_POS(col, row)     ((row) * cols + (col))
  98. #define GLYPH_POS(glyph, y)  ((glyph) * glyphbytes + (y) * glyphscanline)
  99.  
  100.  
  101. static void (*rgb_conv)(void *, uint32_t);
  102.  
  103.  
  104. /** ARGB 8:8:8:8 conversion
  105.  *
  106.  */
  107. static void rgb_0888(void *dst, uint32_t rgb)
  108. {
  109.     *((uint32_t *) dst) = rgb & 0xffffff;
  110. }
  111.  
  112.  
  113. /** ABGR 8:8:8:8 conversion
  114.  *
  115.  */
  116. static void bgr_0888(void *dst, uint32_t rgb)
  117. {
  118.     *((uint32_t *) dst)
  119.         = (BLUE(rgb, 8) << 16) | (GREEN(rgb, 8) << 8) | RED(rgb, 8);
  120. }
  121.  
  122.  
  123. /** BGR 8:8:8 conversion
  124.  *
  125.  */
  126. static void rgb_888(void *dst, uint32_t rgb)
  127. {
  128. #if defined(FB_INVERT_ENDIAN)
  129.     ((uint8_t *) dst)[0] = RED(rgb, 8);
  130.     ((uint8_t *) dst)[1] = GREEN(rgb, 8);
  131.     ((uint8_t *) dst)[2] = BLUE(rgb, 8);
  132. #else
  133.     ((uint8_t *) dst)[0] = BLUE(rgb, 8);
  134.     ((uint8_t *) dst)[1] = GREEN(rgb, 8);
  135.     ((uint8_t *) dst)[2] = RED(rgb, 8);
  136. #endif
  137. }
  138.  
  139.  
  140. /** RGB 5:5:5 conversion
  141.  *
  142.  */
  143. static void rgb_555(void *dst, uint32_t rgb)
  144. {
  145.     *((uint16_t *) dst)
  146.         = (RED(rgb, 5) << 10) | (GREEN(rgb, 5) << 5) | BLUE(rgb, 5);
  147. }
  148.  
  149.  
  150. /** RGB 5:6:5 conversion
  151.  *
  152.  */
  153. static void rgb_565(void *dst, uint32_t rgb)
  154. {
  155.     *((uint16_t *) dst)
  156.         = (RED(rgb, 5) << 11) | (GREEN(rgb, 6) << 5) | BLUE(rgb, 5);
  157. }
  158.  
  159.  
  160. /** RGB 3:2:3
  161.  *
  162.  * Even though we try 3:2:3 color scheme here, an 8-bit framebuffer
  163.  * will most likely use a color palette. The color appearance
  164.  * will be pretty random and depend on the default installed
  165.  * palette. This could be fixed by supporting custom palette
  166.  * and setting it to simulate the 8-bit truecolor.
  167.  *
  168.  * Currently we set the palette on the ia32, amd64 and sparc64 port.
  169.  *
  170.  * Note that the byte is being inverted by this function. The reason is
  171.  * that we would like to use a color palette where the white color code
  172.  * is 0 and the black color code is 255, as some machines (Sun Blade 1500)
  173.  * use these codes for black and white and prevent to set codes
  174.  * 0 and 255 to other colors.
  175.  *
  176.  */
  177. static void rgb_323(void *dst, uint32_t rgb)
  178. {
  179.     *((uint8_t *) dst)
  180.         = ~((RED(rgb, 3) << 5) | (GREEN(rgb, 2) << 3) | BLUE(rgb, 3));
  181. }
  182.  
  183.  
  184. /** Hide logo and refresh screen
  185.  *
  186.  */
  187. static void logo_hide(void)
  188. {
  189.     ylogo = 0;
  190.     ytrim = yres;
  191.     rowtrim = rows;
  192.     fb_redraw();
  193. }
  194.  
  195.  
  196. /** Draw character at given position
  197.  *
  198.  */
  199. static void glyph_draw(uint8_t glyph, unsigned int col, unsigned int row)
  200. {
  201.     unsigned int x = COL2X(col);
  202.     unsigned int y = ROW2Y(row);
  203.     unsigned int yd;
  204.    
  205.     if (y >= ytrim)
  206.         logo_hide();
  207.    
  208.     backbuf[BB_POS(col, row)] = glyph;
  209.    
  210.     for (yd = 0; yd < FONT_SCANLINES; yd++)
  211.         memcpy(&fb_addr[FB_POS(x, y + yd + ylogo)],
  212.             &glyphs[GLYPH_POS(glyph, yd)], glyphscanline);
  213. }
  214.  
  215.  
  216. /** Scroll screen down by one row
  217.  *
  218.  *
  219.  */
  220. static void screen_scroll(void)
  221. {
  222.     if (ylogo > 0) {
  223.         logo_hide();
  224.         return;
  225.     }
  226.    
  227.     unsigned int row;
  228.    
  229.     for (row = 0; row < rows; row++) {
  230.         unsigned int y = ROW2Y(row);
  231.         unsigned int yd;
  232.        
  233.         for (yd = 0; yd < FONT_SCANLINES; yd++) {
  234.             unsigned int x;
  235.             unsigned int col;
  236.            
  237.             for (col = 0, x = 0; col < cols; col++,
  238.                 x += FONT_WIDTH) {
  239.                 uint8_t glyph;
  240.                
  241.                 if (row < rows - 1) {
  242.                     if (backbuf[BB_POS(col, row)] ==
  243.                         backbuf[BB_POS(col, row + 1)])
  244.                         continue;
  245.                    
  246.                     glyph = backbuf[BB_POS(col, row + 1)];
  247.                 } else
  248.                     glyph = 0;
  249.                
  250.                 memcpy(&fb_addr[FB_POS(x, y + yd)],
  251.                     &glyphs[GLYPH_POS(glyph, yd)],
  252.                     glyphscanline);
  253.             }
  254.         }
  255.     }
  256.    
  257.     memmove(backbuf, backbuf + cols, cols * (rows - 1));
  258.     memsetb(&backbuf[BB_POS(0, rows - 1)], cols, 0);
  259. }
  260.  
  261.  
  262. static void cursor_put(void)
  263. {
  264.     glyph_draw(CURSOR, position % cols, position / cols);
  265. }
  266.  
  267.  
  268. static void cursor_remove(void)
  269. {
  270.     glyph_draw(0, position % cols, position / cols);
  271. }
  272.  
  273.  
  274. /** Print character to screen
  275.  *
  276.  * Emulate basic terminal commands.
  277.  *
  278.  */
  279. static void fb_putchar(chardev_t *dev, char ch)
  280. {
  281.     spinlock_lock(&fb_lock);
  282.    
  283.     switch (ch) {
  284.     case '\n':
  285.         cursor_remove();
  286.         position += cols;
  287.         position -= position % cols;
  288.         break;
  289.     case '\r':
  290.         cursor_remove();
  291.         position -= position % cols;
  292.         break;
  293.     case '\b':
  294.         cursor_remove();
  295.         if (position % cols)
  296.             position--;
  297.         break;
  298.     case '\t':
  299.         cursor_remove();
  300.         do {
  301.             glyph_draw((uint8_t) ' ', position % cols,
  302.                 position / cols);
  303.             position++;
  304.         } while ((position % 8) && (position < cols * rows));
  305.         break;
  306.     default:
  307.         glyph_draw((uint8_t) ch, position % cols, position / cols);
  308.         position++;
  309.     }
  310.    
  311.     if (position >= cols * rows) {
  312.         position -= cols;
  313.         screen_scroll();
  314.     }
  315.    
  316.     cursor_put();
  317.    
  318.     spinlock_unlock(&fb_lock);
  319. }
  320.  
  321. static chardev_t framebuffer;
  322. static chardev_operations_t fb_ops = {
  323.     .write = fb_putchar,
  324. };
  325.  
  326.  
  327. /** Render glyphs
  328.  *
  329.  * Convert glyphs from device independent font
  330.  * description to current visual representation.
  331.  *
  332.  */
  333. static void glyphs_render(void)
  334. {
  335.     /* Prerender glyphs */
  336.     unsigned int glyph;
  337.    
  338.     for (glyph = 0; glyph < FONT_GLYPHS; glyph++) {
  339.         unsigned int y;
  340.        
  341.         for (y = 0; y < FONT_SCANLINES; y++) {
  342.             unsigned int x;
  343.            
  344.             for (x = 0; x < FONT_WIDTH; x++) {
  345.                 void *dst = &glyphs[GLYPH_POS(glyph, y) +
  346.                     x * pixelbytes];
  347.                 uint32_t rgb = (fb_font[ROW2Y(glyph) + y] &
  348.                     (1 << (7 - x))) ? FG_COLOR : BG_COLOR;
  349.                 rgb_conv(dst, rgb);
  350.             }
  351.         }
  352.     }
  353.    
  354.     /* Prerender background scanline */
  355.     unsigned int x;
  356.    
  357.     for (x = 0; x < xres; x++)
  358.         rgb_conv(&bgscan[x * pixelbytes], BG_COLOR);
  359. }
  360.  
  361.  
  362. /** Refresh the screen
  363.  *
  364.  */
  365. void fb_redraw(void)
  366. {
  367.     if (ylogo > 0) {
  368.         unsigned int y;
  369.        
  370.         for (y = 0; y < LOGO_HEIGHT; y++) {
  371.             unsigned int x;
  372.            
  373.             for (x = 0; x < xres; x++)
  374.                 rgb_conv(&fb_addr[FB_POS(x, y)],
  375.                     (x < LOGO_WIDTH) ?
  376.                     fb_logo[y * LOGO_WIDTH + x] :
  377.                     LOGO_COLOR);
  378.         }
  379.     }
  380.    
  381.     unsigned int row;
  382.    
  383.     for (row = 0; row < rowtrim; row++) {
  384.         unsigned int y = ylogo + ROW2Y(row);
  385.         unsigned int yd;
  386.        
  387.         for (yd = 0; yd < FONT_SCANLINES; yd++) {
  388.             unsigned int x;
  389.             unsigned int col;
  390.            
  391.             for (col = 0, x = 0; col < cols;
  392.                 col++, x += FONT_WIDTH) {
  393.                 void *d = &fb_addr[FB_POS(x, y + yd)];
  394.                 void *s = &glyphs[GLYPH_POS(backbuf[BB_POS(col,
  395.                     row)], yd)];
  396.                 memcpy(d, s, glyphscanline);
  397.             }
  398.         }
  399.     }
  400.    
  401.     if (COL2X(cols) < xres) {
  402.         unsigned int y;
  403.         unsigned int size = (xres - COL2X(cols)) * pixelbytes;
  404.        
  405.         for (y = ylogo; y < yres; y++)
  406.             memcpy(&fb_addr[FB_POS(COL2X(cols), y)], bgscan, size);
  407.     }
  408.    
  409.     if (ROW2Y(rowtrim) + ylogo < yres) {
  410.         unsigned int y;
  411.        
  412.         for (y = ROW2Y(rowtrim) + ylogo; y < yres; y++)
  413.             memcpy(&fb_addr[FB_POS(0, y)], bgscan, bgscanbytes);
  414.     }
  415. }
  416.  
  417.  
  418. /** Initialize framebuffer as a chardev output device
  419.  *
  420.  * @param addr   Physical address of the framebuffer
  421.  * @param x      Screen width in pixels
  422.  * @param y      Screen height in pixels
  423.  * @param scan   Bytes per one scanline
  424.  * @param visual Color model
  425.  *
  426.  */
  427. void fb_init(fb_properties_t *props)
  428. {
  429.     switch (props->visual) {
  430.     case VISUAL_INDIRECT_8:
  431.         rgb_conv = rgb_323;
  432.         pixelbytes = 1;
  433.         break;
  434.     case VISUAL_RGB_5_5_5:
  435.         rgb_conv = rgb_555;
  436.         pixelbytes = 2;
  437.         break;
  438.     case VISUAL_RGB_5_6_5:
  439.         rgb_conv = rgb_565;
  440.         pixelbytes = 2;
  441.         break;
  442.     case VISUAL_RGB_8_8_8:
  443.         rgb_conv = rgb_888;
  444.         pixelbytes = 3;
  445.         break;
  446.     case VISUAL_RGB_8_8_8_0:
  447.         rgb_conv = rgb_888;
  448.         pixelbytes = 4;
  449.         break;
  450.     case VISUAL_RGB_0_8_8_8:
  451.         rgb_conv = rgb_0888;
  452.         pixelbytes = 4;
  453.         break;
  454.     case VISUAL_BGR_0_8_8_8:
  455.         rgb_conv = bgr_0888;
  456.         pixelbytes = 4;
  457.         break;
  458.     default:
  459.         panic("Unsupported visual.\n");
  460.     }
  461.    
  462.     xres = props->x;
  463.     yres = props->y;
  464.     scanline = props->scan;
  465.    
  466.     cols = X2COL(xres);
  467.     rows = Y2ROW(yres);
  468.    
  469.     if (yres > ylogo) {
  470.         ylogo = LOGO_HEIGHT;
  471.         rowtrim = rows - Y2ROW(ylogo);
  472.         if (ylogo % FONT_SCANLINES > 0)
  473.             rowtrim--;
  474.         ytrim = ROW2Y(rowtrim);
  475.     } else {
  476.         ylogo = 0;
  477.         ytrim = yres;
  478.         rowtrim = rows;
  479.     }
  480.    
  481.     glyphscanline = FONT_WIDTH * pixelbytes;
  482.     glyphbytes = ROW2Y(glyphscanline);
  483.     bgscanbytes = xres * pixelbytes;
  484.    
  485.     unsigned int fbsize = scanline * yres;
  486.     unsigned int bbsize = cols * rows;
  487.     unsigned int glyphsize = FONT_GLYPHS * glyphbytes;
  488.    
  489.     backbuf = (uint8_t *) malloc(bbsize, 0);
  490.     if (!backbuf)
  491.         panic("Unable to allocate backbuffer.\n");
  492.    
  493.     glyphs = (uint8_t *) malloc(glyphsize, 0);
  494.     if (!glyphs)
  495.         panic("Unable to allocate glyphs.\n");
  496.    
  497.     bgscan = malloc(bgscanbytes, 0);
  498.     if (!bgscan)
  499.         panic("Unable to allocate background pixel.\n");
  500.    
  501.     memsetb(backbuf, bbsize, 0);
  502.    
  503.     glyphs_render();
  504.    
  505.     fb_addr = (uint8_t *) hw_map((uintptr_t) props->addr, fbsize);
  506.    
  507.     fb_parea.pbase = (uintptr_t) props->addr + props->offset;
  508.     fb_parea.vbase = (uintptr_t) fb_addr;
  509.     fb_parea.frames = SIZE2FRAMES(fbsize);
  510.     fb_parea.cacheable = false;
  511.     ddi_parea_register(&fb_parea);
  512.    
  513.     sysinfo_set_item_val("fb", NULL, true);
  514.     sysinfo_set_item_val("fb.kind", NULL, 1);
  515.     sysinfo_set_item_val("fb.width", NULL, xres);
  516.     sysinfo_set_item_val("fb.height", NULL, yres);
  517.     sysinfo_set_item_val("fb.scanline", NULL, scanline);
  518.     sysinfo_set_item_val("fb.visual", NULL, props->visual);
  519.     sysinfo_set_item_val("fb.address.physical", NULL, props->addr);
  520.    
  521.     fb_redraw();
  522.    
  523.     chardev_initialize("fb", &framebuffer, &fb_ops);
  524.     stdout = &framebuffer;
  525. }
  526.  
  527. /** @}
  528.  */
  529.