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  1. /*
  2.  * Copyright (C) 2006 Ondrej Palkovsky
  3.  * All rights reserved.
  4.  *
  5.  * Redistribution and use in source and binary forms, with or without
  6.  * modification, are permitted provided that the following conditions
  7.  * are met:
  8.  *
  9.  * - Redistributions of source code must retain the above copyright
  10.  *   notice, this list of conditions and the following disclaimer.
  11.  * - Redistributions in binary form must reproduce the above copyright
  12.  *   notice, this list of conditions and the following disclaimer in the
  13.  *   documentation and/or other materials provided with the distribution.
  14.  * - The name of the author may not be used to endorse or promote products
  15.  *   derived from this software without specific prior written permission.
  16.  *
  17.  * THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``AS IS'' AND ANY EXPRESS OR
  18.  * IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES
  19.  * OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED.
  20.  * IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR ANY DIRECT, INDIRECT,
  21.  * INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT
  22.  * NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
  23.  * DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
  24.  * THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
  25.  * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF
  26.  * THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
  27.  */
  28.  
  29. /** @addtogroup genarch
  30.  * @{
  31.  */
  32. /** @file
  33.  */
  34.  
  35. #include <genarch/fb/font-8x16.h>
  36. #include <genarch/fb/visuals.h>
  37. #include <genarch/fb/fb.h>
  38. #include <console/chardev.h>
  39. #include <console/console.h>
  40. #include <sysinfo/sysinfo.h>
  41. #include <mm/slab.h>
  42. #include <align.h>
  43. #include <panic.h>
  44. #include <memstr.h>
  45. #include <config.h>
  46. #include <bitops.h>
  47. #include <print.h>
  48.  
  49. #include "helenos.xbm"
  50.  
  51. SPINLOCK_INITIALIZE(fb_lock);
  52.  
  53. static uint8_t *fbaddress = NULL;
  54.  
  55. static uint8_t *blankline = NULL;
  56. static uint8_t *dbbuffer = NULL; /* Buffer for fast scrolling console */
  57. static int dboffset;
  58.  
  59. static unsigned int xres = 0;
  60. static unsigned int yres = 0;
  61. static unsigned int scanline = 0;
  62. static unsigned int pixelbytes = 0;
  63. #ifdef FB_INVERT_COLORS
  64. static bool invert_colors = true;
  65. #else
  66. static bool invert_colors = false;
  67. #endif
  68.  
  69. static unsigned int position = 0;
  70. static unsigned int columns = 0;
  71. static unsigned int rows = 0;
  72.  
  73. #define COL_WIDTH   8
  74. #define ROW_BYTES   (scanline * FONT_SCANLINES)
  75.  
  76. #define BGCOLOR     0x000080
  77. #define FGCOLOR     0xffff00
  78. #define LOGOCOLOR   0x2020b0
  79.  
  80. #define RED(x, bits)    ((x >> (16 + 8 - bits)) & ((1 << bits) - 1))
  81. #define GREEN(x, bits)  ((x >> (8 + 8 - bits)) & ((1 << bits) - 1))
  82. #define BLUE(x, bits)   ((x >> (8 - bits)) & ((1 << bits) - 1))
  83.  
  84. #define POINTPOS(x, y)  ((y) * scanline + (x) * pixelbytes)
  85.  
  86. /***************************************************************/
  87. /* Pixel specific fuctions */
  88.  
  89. static void (*rgb2scr)(void *, int);
  90. static int (*scr2rgb)(void *);
  91.  
  92. static inline int COLOR(int color)
  93. {
  94.     return invert_colors ? ~color : color;
  95. }
  96.  
  97. /* Conversion routines between different color representations */
  98. static void rgb_byte0888(void *dst, int rgb)
  99. {
  100.     *((int *) dst) = rgb;
  101. }
  102.  
  103. static int byte0888_rgb(void *src)
  104. {
  105.     return (*((int *) src)) & 0xffffff;
  106. }
  107.  
  108. static void bgr_byte0888(void *dst, int rgb)
  109. {
  110.     *((uint32_t *) dst) = BLUE(rgb, 8) << 16 | GREEN(rgb, 8) << 8 | RED(rgb, 8);
  111. }
  112.  
  113. static int byte0888_bgr(void *src)
  114. {
  115.     int color = *(uint32_t *)(src);
  116.     return ((color & 0xff) << 16) | (((color >> 8) & 0xff) << 8) | ((color >> 16) & 0xff);
  117. }
  118.  
  119. static void rgb_byte888(void *dst, int rgb)
  120. {
  121.     uint8_t *scr = dst;
  122. #if defined(FB_INVERT_ENDIAN)
  123.     scr[0] = RED(rgb, 8);
  124.     scr[1] = GREEN(rgb, 8);
  125.     scr[2] = BLUE(rgb, 8);
  126. #else
  127.     scr[2] = RED(rgb, 8);
  128.     scr[1] = GREEN(rgb, 8);
  129.     scr[0] = BLUE(rgb, 8);
  130. #endif
  131. }
  132.  
  133. static int byte888_rgb(void *src)
  134. {
  135.     uint8_t *scr = src;
  136. #if defined(FB_INVERT_ENDIAN)
  137.     return scr[0] << 16 | scr[1] << 8 | scr[2];
  138. #else
  139.     return scr[2] << 16 | scr[1] << 8 | scr[0];
  140. #endif 
  141. }
  142.  
  143. /**  16-bit depth (5:5:5) */
  144. static void rgb_byte555(void *dst, int rgb)
  145. {
  146.     /* 5-bit, 5-bits, 5-bits */
  147.     *((uint16_t *) dst) = RED(rgb, 5) << 10 | GREEN(rgb, 5) << 5 | BLUE(rgb, 5);
  148. }
  149.  
  150. /** 16-bit depth (5:5:5) */
  151. static int byte555_rgb(void *src)
  152. {
  153.     int color = *(uint16_t *)(src);
  154.     return (((color >> 10) & 0x1f) << (16 + 3)) | (((color >> 5) & 0x1f) << (8 + 3)) | ((color & 0x1f) << 3);
  155. }
  156.  
  157. /**  16-bit depth (5:6:5) */
  158. static void rgb_byte565(void *dst, int rgb)
  159. {
  160.     /* 5-bit, 6-bits, 5-bits */
  161.     *((uint16_t *) dst) = RED(rgb, 5) << 11 | GREEN(rgb, 6) << 5 | BLUE(rgb, 5);
  162. }
  163.  
  164. /** 16-bit depth (5:6:5) */
  165. static int byte565_rgb(void *src)
  166. {
  167.     int color = *(uint16_t *)(src);
  168.     return (((color >> 11) & 0x1f) << (16 + 3)) | (((color >> 5) & 0x3f) << (8 + 2)) | ((color & 0x1f) << 3);
  169. }
  170.  
  171. /** Put pixel - 8-bit depth (color palette/3:2:3)
  172.  *
  173.  * Even though we try 3:2:3 color scheme here, an 8-bit framebuffer
  174.  * will most likely use a color palette. The color appearance
  175.  * will be pretty random and depend on the default installed
  176.  * palette. This could be fixed by supporting custom palette
  177.  * and setting it to simulate the 8-bit truecolor.
  178.  */
  179. static void rgb_byte8(void *dst, int rgb)
  180. {
  181.     *((uint8_t *) dst) = RED(rgb, 3) << 5 | GREEN(rgb, 2) << 3 | BLUE(rgb, 3);
  182. }
  183.  
  184. /** Return pixel color - 8-bit depth (color palette/3:2:3)
  185.  *
  186.  * See the comment for rgb_byte().
  187.  */
  188. static int byte8_rgb(void *src)
  189. {
  190.     int color = *(uint8_t *)src;
  191.     return (((color >> 5) & 0x7) << (16 + 5)) | (((color >> 3) & 0x3) << (8 + 6)) | ((color & 0x7) << 5);
  192. }
  193.  
  194. static void putpixel(unsigned int x, unsigned int y, int color)
  195. {
  196.     (*rgb2scr)(&fbaddress[POINTPOS(x, y)], COLOR(color));
  197.  
  198.     if (dbbuffer) {
  199.         int dline = (y + dboffset) % yres;
  200.         (*rgb2scr)(&dbbuffer[POINTPOS(x, dline)], COLOR(color));
  201.     }
  202. }
  203.  
  204. /** Get pixel from viewport */
  205. static int getpixel(unsigned int x, unsigned int y)
  206. {
  207.     if (dbbuffer) {
  208.         int dline = (y + dboffset) % yres;
  209.         return COLOR((*scr2rgb)(&dbbuffer[POINTPOS(x, dline)]));
  210.     }
  211.     return COLOR((*scr2rgb)(&fbaddress[POINTPOS(x, y)]));
  212. }
  213.  
  214.  
  215. /** Fill screen with background color */
  216. static void clear_screen(void)
  217. {
  218.     unsigned int y;
  219.  
  220.     for (y = 0; y < yres; y++) {
  221.         memcpy(&fbaddress[scanline * y], blankline, xres * pixelbytes);
  222.         if (dbbuffer)
  223.             memcpy(&dbbuffer[scanline * y], blankline, xres * pixelbytes);
  224.     }
  225. }
  226.  
  227.  
  228. /** Scroll screen one row up */
  229. static void scroll_screen(void)
  230. {
  231.     uint8_t *lastline = &fbaddress[(rows - 1) * ROW_BYTES];
  232.     int firstsz;
  233.  
  234.     if (dbbuffer) {
  235.         memcpy(&dbbuffer[dboffset * scanline], blankline, ROW_BYTES);
  236.        
  237.         dboffset = (dboffset + FONT_SCANLINES) % yres;
  238.         firstsz = yres - dboffset;
  239.  
  240.         memcpy(fbaddress, &dbbuffer[scanline * dboffset], firstsz * scanline);
  241.         memcpy(&fbaddress[firstsz * scanline], dbbuffer, dboffset * scanline);
  242.     } else {
  243.         memcpy((void *) fbaddress, (void *) &fbaddress[ROW_BYTES], scanline * yres - ROW_BYTES);
  244.         /* Clear last row */
  245.         memcpy((void *) lastline, (void *) blankline, ROW_BYTES);
  246.     }
  247. }
  248.  
  249.  
  250. static void invert_pixel(unsigned int x, unsigned int y)
  251. {
  252.     putpixel(x, y, ~getpixel(x, y));
  253. }
  254.  
  255.  
  256. /** Draw one line of glyph at a given position */
  257. static void draw_glyph_line(unsigned int glline, unsigned int x, unsigned int y)
  258. {
  259.     unsigned int i;
  260.  
  261.     for (i = 0; i < 8; i++)
  262.         if (glline & (1 << (7 - i))) {
  263.             putpixel(x + i, y, FGCOLOR);
  264.         } else
  265.             putpixel(x + i, y, BGCOLOR);
  266. }
  267.  
  268. /***************************************************************/
  269. /* Character-console functions */
  270.  
  271. /** Draw character at given position */
  272. static void draw_glyph(uint8_t glyph, unsigned int col, unsigned int row)
  273. {
  274.     unsigned int y;
  275.  
  276.     for (y = 0; y < FONT_SCANLINES; y++)
  277.         draw_glyph_line(fb_font[glyph * FONT_SCANLINES + y], col * COL_WIDTH, row * FONT_SCANLINES + y);
  278. }
  279.  
  280. /** Invert character at given position */
  281. static void invert_char(unsigned int col, unsigned int row)
  282. {
  283.     unsigned int x;
  284.     unsigned int y;
  285.  
  286.     for (x = 0; x < COL_WIDTH; x++)
  287.         for (y = 0; y < FONT_SCANLINES; y++)
  288.             invert_pixel(col * COL_WIDTH + x, row * FONT_SCANLINES + y);
  289. }
  290.  
  291. /** Draw character at default position */
  292. static void draw_char(char chr)
  293. {
  294.     draw_glyph(chr, position % columns, position / columns);
  295. }
  296.  
  297. static void draw_logo(unsigned int startx, unsigned int starty)
  298. {
  299.     unsigned int x;
  300.     unsigned int y;
  301.     unsigned int byte;
  302.     unsigned int rowbytes;
  303.  
  304.     rowbytes = (helenos_width - 1) / 8 + 1;
  305.  
  306.     for (y = 0; y < helenos_height; y++)
  307.         for (x = 0; x < helenos_width; x++) {
  308.             byte = helenos_bits[rowbytes * y + x / 8];
  309.             byte >>= x % 8;
  310.             if (byte & 1)
  311.                 putpixel(startx + x, starty + y, COLOR(LOGOCOLOR));
  312.         }
  313. }
  314.  
  315. /***************************************************************/
  316. /* Stdout specific functions */
  317.  
  318. static void invert_cursor(void)
  319. {
  320.     invert_char(position % columns, position / columns);
  321. }
  322.  
  323. /** Print character to screen
  324.  *
  325.  *  Emulate basic terminal commands
  326.  */
  327. static void fb_putchar(chardev_t *dev, char ch)
  328. {
  329.     spinlock_lock(&fb_lock);
  330.    
  331.     switch (ch) {
  332.     case '\n':
  333.         invert_cursor();
  334.         position += columns;
  335.         position -= position % columns;
  336.         break;
  337.     case '\r':
  338.         invert_cursor();
  339.         position -= position % columns;
  340.         break;
  341.     case '\b':
  342.         invert_cursor();
  343.         if (position % columns)
  344.             position--;
  345.         break;
  346.     case '\t':
  347.         invert_cursor();
  348.         do {
  349.             draw_char(' ');
  350.             position++;
  351.         } while ((position % 8) && position < columns * rows);
  352.         break;
  353.     default:
  354.         draw_char(ch);
  355.         position++;
  356.     }
  357.    
  358.     if (position >= columns * rows) {
  359.         position -= columns;
  360.         scroll_screen();
  361.     }
  362.    
  363.     invert_cursor();
  364.    
  365.     spinlock_unlock(&fb_lock);
  366. }
  367.  
  368. static chardev_t framebuffer;
  369. static chardev_operations_t fb_ops = {
  370.     .write = fb_putchar,
  371. };
  372.  
  373.  
  374. /** Initialize framebuffer as a chardev output device
  375.  *
  376.  * @param addr   Physical address of the framebuffer
  377.  * @param x      Screen width in pixels
  378.  * @param y      Screen height in pixels
  379.  * @param scan   Bytes per one scanline
  380.  * @param visual Color model
  381.  *
  382.  */
  383. void fb_init(uintptr_t addr, unsigned int x, unsigned int y, unsigned int scan, unsigned int visual)
  384. {
  385.     switch (visual) {
  386.     case VISUAL_INDIRECT_8:
  387.         rgb2scr = rgb_byte8;
  388.         scr2rgb = byte8_rgb;
  389.         pixelbytes = 1;
  390.         break;
  391.     case VISUAL_RGB_5_5_5:
  392.         rgb2scr = rgb_byte555;
  393.         scr2rgb = byte555_rgb;
  394.         pixelbytes = 2;
  395.         break;
  396.     case VISUAL_RGB_5_6_5:
  397.         rgb2scr = rgb_byte565;
  398.         scr2rgb = byte565_rgb;
  399.         pixelbytes = 2;
  400.         break;
  401.     case VISUAL_RGB_8_8_8:
  402.         rgb2scr = rgb_byte888;
  403.         scr2rgb = byte888_rgb;
  404.         pixelbytes = 3;
  405.         break;
  406.     case VISUAL_RGB_8_8_8_0:
  407.         rgb2scr = rgb_byte888;
  408.         scr2rgb = byte888_rgb;
  409.         pixelbytes = 4;
  410.         break;
  411.     case VISUAL_RGB_0_8_8_8:
  412.         rgb2scr = rgb_byte0888;
  413.         scr2rgb = byte0888_rgb;
  414.         pixelbytes = 4;
  415.         break;
  416.     case VISUAL_BGR_0_8_8_8:
  417.         rgb2scr = bgr_byte0888;
  418.         scr2rgb = byte0888_bgr;
  419.         pixelbytes = 4;
  420.         break;
  421.     default:
  422.         panic("Unsupported visual.\n");
  423.     }
  424.    
  425.     unsigned int fbsize = scan * y;
  426.    
  427.     /* Map the framebuffer */
  428.     fbaddress = (uint8_t *) hw_map((uintptr_t) addr, fbsize);
  429.    
  430.     xres = x;
  431.     yres = y;
  432.     scanline = scan;
  433.    
  434.     rows = y / FONT_SCANLINES;
  435.     columns = x / COL_WIDTH;
  436.  
  437.     sysinfo_set_item_val("fb", NULL, true);
  438.     sysinfo_set_item_val("fb.kind", NULL, 1);
  439.     sysinfo_set_item_val("fb.width", NULL, xres);
  440.     sysinfo_set_item_val("fb.height", NULL, yres);
  441.     sysinfo_set_item_val("fb.scanline", NULL, scan);
  442.     sysinfo_set_item_val("fb.visual", NULL, visual);
  443.     sysinfo_set_item_val("fb.address.physical", NULL, addr);
  444.     sysinfo_set_item_val("fb.invert-colors", NULL, invert_colors);
  445.  
  446.     /* Allocate double buffer */
  447.     unsigned int order = fnzb(SIZE2FRAMES(ALIGN_UP(fbsize, FRAME_SIZE))) + 1;
  448.     dbbuffer = (uint8_t * ) frame_alloc(order, FRAME_ATOMIC | FRAME_KA);
  449.     if (!dbbuffer)
  450.         printf("Failed to allocate scroll buffer.\n");
  451.     dboffset = 0;
  452.  
  453.     /* Initialized blank line */
  454.     blankline = (uint8_t *) malloc(ROW_BYTES, FRAME_ATOMIC);
  455.     if (!blankline)
  456.         panic("Failed to allocate blank line for framebuffer.");
  457.     for (y = 0; y < FONT_SCANLINES; y++)
  458.         for (x = 0; x < xres; x++)
  459.             (*rgb2scr)(&blankline[POINTPOS(x, y)], COLOR(BGCOLOR));
  460.    
  461.     clear_screen();
  462.  
  463.     /* Update size of screen to match text area */
  464.     yres = rows * FONT_SCANLINES;
  465.  
  466.     draw_logo(xres - helenos_width, 0);
  467.     invert_cursor();
  468.  
  469.     chardev_initialize("fb", &framebuffer, &fb_ops);
  470.     stdout = &framebuffer;
  471. }
  472.  
  473. /** @}
  474.  */
  475.