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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.    
  225.     unsigned int row;
  226.    
  227.     for (row = 0; row < rows; row++) {
  228.         unsigned int y = ROW2Y(row);
  229.         unsigned int yd;
  230.        
  231.         for (yd = 0; yd < FONT_SCANLINES; yd++) {
  232.             unsigned int x;
  233.             unsigned int col;
  234.            
  235.             for (col = 0, x = 0; col < cols; col++, x += FONT_WIDTH) {
  236.                 uint8_t glyph;
  237.                
  238.                 if (row < rows - 1) {
  239.                     if (backbuf[BB_POS(col, row)] == backbuf[BB_POS(col, row + 1)])
  240.                         continue;
  241.                    
  242.                     glyph = backbuf[BB_POS(col, row + 1)];
  243.                 } else
  244.                     glyph = 0;
  245.                
  246.                 memcpy(&fb_addr[FB_POS(x, y + yd)],
  247.                     &glyphs[GLYPH_POS(glyph, yd)], glyphscanline);
  248.             }
  249.         }
  250.     }
  251.    
  252.     memcpy(backbuf, backbuf + cols, cols * (rows - 1));
  253.     memsetb(&backbuf[BB_POS(0, rows - 1)], cols, 0);
  254. }
  255.  
  256.  
  257. static void cursor_put(void)
  258. {
  259.     glyph_draw(CURSOR, position % cols, position / cols);
  260. }
  261.  
  262.  
  263. static void cursor_remove(void)
  264. {
  265.     glyph_draw(0, position % cols, position / cols);
  266. }
  267.  
  268.  
  269. /** Print character to screen
  270.  *
  271.  * Emulate basic terminal commands.
  272.  *
  273.  */
  274. static void fb_putchar(chardev_t *dev, char ch)
  275. {
  276.     spinlock_lock(&fb_lock);
  277.    
  278.     switch (ch) {
  279.     case '\n':
  280.         cursor_remove();
  281.         position += cols;
  282.         position -= position % cols;
  283.         break;
  284.     case '\r':
  285.         cursor_remove();
  286.         position -= position % cols;
  287.         break;
  288.     case '\b':
  289.         cursor_remove();
  290.         if (position % cols)
  291.             position--;
  292.         break;
  293.     case '\t':
  294.         cursor_remove();
  295.         do {
  296.             glyph_draw((uint8_t) ' ', position % cols, position / cols);
  297.             position++;
  298.         } while ((position % 8) && (position < cols * rows));
  299.         break;
  300.     default:
  301.         glyph_draw((uint8_t) ch, position % cols, position / cols);
  302.         position++;
  303.     }
  304.    
  305.     if (position >= cols * rows) {
  306.         position -= cols;
  307.         screen_scroll();
  308.     }
  309.    
  310.     cursor_put();
  311.    
  312.     spinlock_unlock(&fb_lock);
  313. }
  314.  
  315. static chardev_t framebuffer;
  316. static chardev_operations_t fb_ops = {
  317.     .write = fb_putchar,
  318. };
  319.  
  320.  
  321. /** Render glyphs
  322.  *
  323.  * Convert glyphs from device independent font
  324.  * description to current visual representation.
  325.  *
  326.  */
  327. static void glyphs_render(void)
  328. {
  329.     /* Prerender glyphs */
  330.     unsigned int glyph;
  331.    
  332.     for (glyph = 0; glyph < FONT_GLYPHS; glyph++) {
  333.         unsigned int y;
  334.        
  335.         for (y = 0; y < FONT_SCANLINES; y++) {
  336.             unsigned int x;
  337.            
  338.             for (x = 0; x < FONT_WIDTH; x++)
  339.                 rgb_conv(&glyphs[GLYPH_POS(glyph, y) + x * pixelbytes],
  340.                     (fb_font[ROW2Y(glyph) + y] & (1 << (7 - x))) ? FG_COLOR : BG_COLOR);
  341.         }
  342.     }
  343.    
  344.     /* Prerender background scanline */
  345.     unsigned int x;
  346.    
  347.     for (x = 0; x < xres; x++)
  348.         rgb_conv(&bgscan[x * pixelbytes], BG_COLOR);
  349. }
  350.  
  351.  
  352. /** Refresh the screen
  353.  *
  354.  */
  355. void fb_redraw(void)
  356. {
  357.     if (ylogo > 0) {
  358.         unsigned int y;
  359.        
  360.         for (y = 0; y < LOGO_HEIGHT; y++) {
  361.             unsigned int x;
  362.            
  363.             for (x = 0; x < xres; x++)
  364.                 rgb_conv(&fb_addr[FB_POS(x, y)],
  365.                     (x < LOGO_WIDTH) ? fb_logo[y * LOGO_WIDTH + x] : LOGO_COLOR);
  366.         }
  367.     }
  368.    
  369.     unsigned int row;
  370.    
  371.     for (row = 0; row < rowtrim; row++) {
  372.         unsigned int y = ylogo + ROW2Y(row);
  373.         unsigned int yd;
  374.        
  375.         for (yd = 0; yd < FONT_SCANLINES; yd++) {
  376.             unsigned int x;
  377.             unsigned int col;
  378.            
  379.             for (col = 0, x = 0; col < cols; col++, x += FONT_WIDTH)
  380.                 memcpy(&fb_addr[FB_POS(x, y + yd)],
  381.                 &glyphs[GLYPH_POS(backbuf[BB_POS(col, row)], yd)],
  382.                 glyphscanline);
  383.         }
  384.     }
  385.    
  386.     if (COL2X(cols) < xres) {
  387.         unsigned int y;
  388.         unsigned int size = (xres - COL2X(cols)) * pixelbytes;
  389.        
  390.         for (y = ylogo; y < yres; y++)
  391.             memcpy(&fb_addr[FB_POS(COL2X(cols), y)], bgscan, size);
  392.     }
  393.    
  394.     if (ROW2Y(rowtrim) < yres) {
  395.         unsigned int y;
  396.        
  397.         for (y = ROW2Y(rowtrim); y < yres; y++)
  398.             memcpy(&fb_addr[FB_POS(0, y)], bgscan, bgscanbytes);
  399.     }
  400. }
  401.  
  402.  
  403. /** Initialize framebuffer as a chardev output device
  404.  *
  405.  * @param addr   Physical address of the framebuffer
  406.  * @param x      Screen width in pixels
  407.  * @param y      Screen height in pixels
  408.  * @param scan   Bytes per one scanline
  409.  * @param visual Color model
  410.  *
  411.  */
  412. void fb_init(fb_properties_t *props)
  413. {
  414.     switch (props->visual) {
  415.     case VISUAL_INDIRECT_8:
  416.         rgb_conv = rgb_323;
  417.         pixelbytes = 1;
  418.         break;
  419.     case VISUAL_RGB_5_5_5:
  420.         rgb_conv = rgb_555;
  421.         pixelbytes = 2;
  422.         break;
  423.     case VISUAL_RGB_5_6_5:
  424.         rgb_conv = rgb_565;
  425.         pixelbytes = 2;
  426.         break;
  427.     case VISUAL_RGB_8_8_8:
  428.         rgb_conv = rgb_888;
  429.         pixelbytes = 3;
  430.         break;
  431.     case VISUAL_RGB_8_8_8_0:
  432.         rgb_conv = rgb_888;
  433.         pixelbytes = 4;
  434.         break;
  435.     case VISUAL_RGB_0_8_8_8:
  436.         rgb_conv = rgb_0888;
  437.         pixelbytes = 4;
  438.         break;
  439.     case VISUAL_BGR_0_8_8_8:
  440.         rgb_conv = bgr_0888;
  441.         pixelbytes = 4;
  442.         break;
  443.     default:
  444.         panic("Unsupported visual.\n");
  445.     }
  446.    
  447.     xres = props->x;
  448.     yres = props->y;
  449.     scanline = props->scan;
  450.    
  451.     cols = X2COL(xres);
  452.     rows = Y2ROW(yres);
  453.    
  454.     if (yres > ylogo) {
  455.         ylogo = LOGO_HEIGHT;
  456.         rowtrim = rows - Y2ROW(ylogo);
  457.         if (ylogo % FONT_SCANLINES > 0)
  458.             rowtrim--;
  459.         ytrim = ROW2Y(rowtrim);
  460.     } else {
  461.         ylogo = 0;
  462.         ytrim = yres;
  463.         rowtrim = rows;
  464.     }
  465.    
  466.     glyphscanline = FONT_WIDTH * pixelbytes;
  467.     glyphbytes = ROW2Y(glyphscanline);
  468.     bgscanbytes = xres * pixelbytes;
  469.    
  470.     unsigned int fbsize = scanline * yres;
  471.     unsigned int bbsize = cols * rows;
  472.     unsigned int glyphsize = FONT_GLYPHS * glyphbytes;
  473.    
  474.     backbuf = (uint8_t *) malloc(bbsize, 0);
  475.     if (!backbuf)
  476.         panic("Unable to allocate backbuffer.\n");
  477.    
  478.     glyphs = (uint8_t *) malloc(glyphsize, 0);
  479.     if (!glyphs)
  480.         panic("Unable to allocate glyphs.\n");
  481.    
  482.     bgscan = malloc(bgscanbytes, 0);
  483.     if (!bgscan)
  484.         panic("Unable to allocate background pixel.\n");
  485.    
  486.     memsetb(backbuf, bbsize, 0);
  487.    
  488.     glyphs_render();
  489.    
  490.     fb_addr = (uint8_t *) hw_map((uintptr_t) props->addr, fbsize);
  491.    
  492.     fb_parea.pbase = (uintptr_t) props->addr + props->offset;
  493.     fb_parea.vbase = (uintptr_t) fb_addr;
  494.     fb_parea.frames = SIZE2FRAMES(fbsize);
  495.     fb_parea.cacheable = false;
  496.     ddi_parea_register(&fb_parea);
  497.    
  498.     sysinfo_set_item_val("fb", NULL, true);
  499.     sysinfo_set_item_val("fb.kind", NULL, 1);
  500.     sysinfo_set_item_val("fb.width", NULL, xres);
  501.     sysinfo_set_item_val("fb.height", NULL, yres);
  502.     sysinfo_set_item_val("fb.scanline", NULL, scanline);
  503.     sysinfo_set_item_val("fb.visual", NULL, props->visual);
  504.     sysinfo_set_item_val("fb.address.physical", NULL, props->addr);
  505.    
  506.     fb_redraw();
  507.    
  508.     chardev_initialize("fb", &framebuffer, &fb_ops);
  509.     stdout = &framebuffer;
  510. }
  511.  
  512. /** @}
  513.  */
  514.