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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/fb.h>
  37. #include <console/chardev.h>
  38. #include <console/console.h>
  39. #include <sysinfo/sysinfo.h>
  40. #include <mm/slab.h>
  41. #include <align.h>
  42. #include <panic.h>
  43. #include <memstr.h>
  44. #include <config.h>
  45. #include <bitops.h>
  46. #include <print.h>
  47.  
  48. #include "helenos.xbm"
  49.  
  50. SPINLOCK_INITIALIZE(fb_lock);
  51.  
  52. static uint8_t *fbaddress = NULL;
  53.  
  54. static uint8_t *blankline = NULL;
  55. static uint8_t *dbbuffer = NULL; /* Buffer for fast scrolling console */
  56. static int dboffset;
  57.  
  58. static unsigned int xres = 0;
  59. static unsigned int yres = 0;
  60. static unsigned int scanline = 0;
  61. static unsigned int bitspp = 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_4byte(void *dst, int rgb)
  99. {
  100.     *(int *)dst = rgb;
  101. }
  102.  
  103. static int byte4_rgb(void *src)
  104. {
  105.     return (*(int *)src) & 0xffffff;
  106. }
  107.  
  108. static void rgb_3byte(void *dst, int rgb)
  109. {
  110.     uint8_t *scr = dst;
  111. #if defined(FB_INVERT_ENDIAN)
  112.     scr[0] = RED(rgb, 8);
  113.     scr[1] = GREEN(rgb, 8);
  114.     scr[2] = BLUE(rgb, 8);
  115. #else
  116.     scr[2] = RED(rgb, 8);
  117.     scr[1] = GREEN(rgb, 8);
  118.     scr[0] = BLUE(rgb, 8);
  119. #endif
  120. }
  121.  
  122. static int byte3_rgb(void *src)
  123. {
  124.     uint8_t *scr = src;
  125. #if defined(FB_INVERT_ENDIAN)
  126.     return scr[0] << 16 | scr[1] << 8 | scr[2];
  127. #else
  128.     return scr[2] << 16 | scr[1] << 8 | scr[0];
  129. #endif 
  130. }
  131.  
  132. /**  16-bit depth (5:6:5) */
  133. static void rgb_2byte(void *dst, int rgb)
  134. {
  135.     /* 5-bit, 6-bits, 5-bits */
  136.     *((uint16_t *)(dst)) = RED(rgb, 5) << 11 | GREEN(rgb, 6) << 5 | BLUE(rgb, 5);
  137. }
  138.  
  139. /** 16-bit depth (5:6:5) */
  140. static int byte2_rgb(void *src)
  141. {
  142.     int color = *(uint16_t *)(src);
  143.     return (((color >> 11) & 0x1f) << (16 + 3)) | (((color >> 5) & 0x3f) << (8 + 2)) | ((color & 0x1f) << 3);
  144. }
  145.  
  146. /** Put pixel - 8-bit depth (color palette/3:2:3)
  147.  *
  148.  * Even though we try 3:2:3 color scheme here, an 8-bit framebuffer
  149.  * will most likely use a color palette. The color appearance
  150.  * will be pretty random and depend on the default installed
  151.  * palette. This could be fixed by supporting custom palette
  152.  * and setting it to simulate the 8-bit truecolor.
  153.  */
  154. static void rgb_1byte(void *dst, int rgb)
  155. {
  156.     *(uint8_t *)dst = RED(rgb, 3) << 5 | GREEN(rgb, 2) << 3 | BLUE(rgb, 3);
  157. }
  158.  
  159. /** Return pixel color - 8-bit depth (color palette/3:2:3)
  160.  *
  161.  * See the comment for rgb_1byte().
  162.  */
  163. static int byte1_rgb(void *src)
  164. {
  165.     int color = *(uint8_t *)src;
  166.     return (((color >> 5) & 0x7) << (16 + 5)) | (((color >> 3) & 0x3) << (8 + 6)) | ((color & 0x7) << 5);
  167. }
  168.  
  169. static void putpixel(unsigned int x, unsigned int y, int color)
  170. {
  171.     (*rgb2scr)(&fbaddress[POINTPOS(x,y)], COLOR(color));
  172.  
  173.     if (dbbuffer) {
  174.         int dline = (y + dboffset) % yres;
  175.         (*rgb2scr)(&dbbuffer[POINTPOS(x,dline)], COLOR(color));
  176.     }
  177. }
  178.  
  179. /** Get pixel from viewport */
  180. static int getpixel(unsigned int x, unsigned int y)
  181. {
  182.     if (dbbuffer) {
  183.         int dline = (y + dboffset) % yres;
  184.         return COLOR((*scr2rgb)(&dbbuffer[POINTPOS(x,dline)]));
  185.     }
  186.     return COLOR((*scr2rgb)(&fbaddress[POINTPOS(x,y)]));
  187. }
  188.  
  189.  
  190. /** Fill screen with background color */
  191. static void clear_screen(void)
  192. {
  193.     unsigned int y;
  194.  
  195.     for (y = 0; y < yres; y++) {
  196.         memcpy(&fbaddress[scanline*y], blankline, xres*pixelbytes);
  197.         if (dbbuffer)
  198.             memcpy(&dbbuffer[scanline*y], blankline, xres*pixelbytes);
  199.     }
  200. }
  201.  
  202.  
  203. /** Scroll screen one row up */
  204. static void scroll_screen(void)
  205. {
  206.     uint8_t *lastline = &fbaddress[(rows - 1) * ROW_BYTES];
  207.     int firstsz;
  208.  
  209.     if (dbbuffer) {
  210.         memcpy(&dbbuffer[dboffset*scanline], blankline, FONT_SCANLINES*scanline);
  211.        
  212.         dboffset = (dboffset + FONT_SCANLINES) % yres;
  213.         firstsz = yres-dboffset;
  214.  
  215.         memcpy(fbaddress, &dbbuffer[scanline*dboffset], firstsz*scanline);
  216.         memcpy(&fbaddress[firstsz*scanline], dbbuffer, dboffset*scanline);
  217.     } else {
  218.         memcpy((void *) fbaddress, (void *) &fbaddress[ROW_BYTES], scanline * yres - ROW_BYTES);
  219.         /* Clear last row */
  220.         memcpy((void *) lastline, (void *) blankline, ROW_BYTES);
  221.     }
  222. }
  223.  
  224.  
  225. static void invert_pixel(unsigned int x, unsigned int y)
  226. {
  227.     putpixel(x, y, ~getpixel(x, y));
  228. }
  229.  
  230.  
  231. /** Draw one line of glyph at a given position */
  232. static void draw_glyph_line(unsigned int glline, unsigned int x, unsigned int y)
  233. {
  234.     unsigned int i;
  235.  
  236.     for (i = 0; i < 8; i++)
  237.         if (glline & (1 << (7 - i))) {
  238.             putpixel(x + i, y, FGCOLOR);
  239.         } else
  240.             putpixel(x + i, y, BGCOLOR);
  241. }
  242.  
  243. /***************************************************************/
  244. /* Character-console functions */
  245.  
  246. /** Draw character at given position */
  247. static void draw_glyph(uint8_t glyph, unsigned int col, unsigned int row)
  248. {
  249.     unsigned int y;
  250.  
  251.     for (y = 0; y < FONT_SCANLINES; y++)
  252.         draw_glyph_line(fb_font[glyph * FONT_SCANLINES + y], col * COL_WIDTH, row * FONT_SCANLINES + y);
  253. }
  254.  
  255. /** Invert character at given position */
  256. static void invert_char(unsigned int col, unsigned int row)
  257. {
  258.     unsigned int x;
  259.     unsigned int y;
  260.  
  261.     for (x = 0; x < COL_WIDTH; x++)
  262.         for (y = 0; y < FONT_SCANLINES; y++)
  263.             invert_pixel(col * COL_WIDTH + x, row * FONT_SCANLINES + y);
  264. }
  265.  
  266. /** Draw character at default position */
  267. static void draw_char(char chr)
  268. {
  269.     draw_glyph(chr, position % columns, position / columns);
  270. }
  271.  
  272. static void draw_logo(unsigned int startx, unsigned int starty)
  273. {
  274.     unsigned int x;
  275.     unsigned int y;
  276.     unsigned int byte;
  277.     unsigned int rowbytes;
  278.  
  279.     rowbytes = (helenos_width - 1) / 8 + 1;
  280.  
  281.     for (y = 0; y < helenos_height; y++)
  282.         for (x = 0; x < helenos_width; x++) {
  283.             byte = helenos_bits[rowbytes * y + x / 8];
  284.             byte >>= x % 8;
  285.             if (byte & 1)
  286.                 putpixel(startx + x, starty + y, COLOR(LOGOCOLOR));
  287.         }
  288. }
  289.  
  290. /***************************************************************/
  291. /* Stdout specific functions */
  292.  
  293. static void invert_cursor(void)
  294. {
  295.     invert_char(position % columns, position / columns);
  296. }
  297.  
  298. /** Print character to screen
  299.  *
  300.  *  Emulate basic terminal commands
  301.  */
  302. static void fb_putchar(chardev_t *dev, char ch)
  303. {
  304.     spinlock_lock(&fb_lock);
  305.    
  306.     switch (ch) {
  307.     case '\n':
  308.         invert_cursor();
  309.         position += columns;
  310.         position -= position % columns;
  311.         break;
  312.     case '\r':
  313.         invert_cursor();
  314.         position -= position % columns;
  315.         break;
  316.     case '\b':
  317.         invert_cursor();
  318.         if (position % columns)
  319.             position--;
  320.         break;
  321.     case '\t':
  322.         invert_cursor();
  323.         do {
  324.             draw_char(' ');
  325.             position++;
  326.         } while ((position % 8) && position < columns * rows);
  327.         break;
  328.     default:
  329.         draw_char(ch);
  330.         position++;
  331.     }
  332.    
  333.     if (position >= columns * rows) {
  334.         position -= columns;
  335.         scroll_screen();
  336.     }
  337.    
  338.     invert_cursor();
  339.    
  340.     spinlock_unlock(&fb_lock);
  341. }
  342.  
  343. static chardev_t framebuffer;
  344. static chardev_operations_t fb_ops = {
  345.     .write = fb_putchar,
  346. };
  347.  
  348.  
  349. /** Initialize framebuffer as a chardev output device
  350.  *
  351.  * @param addr  Physical address of the framebuffer
  352.  * @param x     Screen width in pixels
  353.  * @param y     Screen height in pixels
  354.  * @param bpp   Bits per pixel (8, 16, 24, 32)
  355.  * @param scan  Bytes per one scanline
  356.  * @param align Request alignment for 24bpp mode.
  357.  */
  358. void fb_init(uintptr_t addr, unsigned int x, unsigned int y, unsigned int bpp, unsigned int scan, bool align)
  359. {
  360.     switch (bpp) {
  361.     case 8:
  362.         rgb2scr = rgb_1byte;
  363.         scr2rgb = byte1_rgb;
  364.         pixelbytes = 1;
  365.         break;
  366.     case 16:
  367.         rgb2scr = rgb_2byte;
  368.         scr2rgb = byte2_rgb;
  369.         pixelbytes = 2;
  370.         break;
  371.     case 24:
  372.         rgb2scr = rgb_3byte;
  373.         scr2rgb = byte3_rgb;
  374.         if (align)
  375.             pixelbytes = 4;
  376.         else
  377.             pixelbytes = 3;
  378.         break;
  379.     case 32:
  380.         rgb2scr = rgb_4byte;
  381.         scr2rgb = byte4_rgb;
  382.         pixelbytes = 4;
  383.         break;
  384.     default:
  385.         panic("Unsupported bpp");
  386.     }
  387.    
  388.     unsigned int fbsize = scan * y;
  389.    
  390.     /* Map the framebuffer */
  391.     fbaddress = (uint8_t *) hw_map((uintptr_t) addr, fbsize);
  392.    
  393.     xres = x;
  394.     yres = y;
  395.     bitspp = bpp;
  396.     scanline = scan;
  397.    
  398.     rows = y / FONT_SCANLINES;
  399.     columns = x / COL_WIDTH;
  400.  
  401.     sysinfo_set_item_val("fb", NULL, true);
  402.     sysinfo_set_item_val("fb.kind", NULL, 1);
  403.     sysinfo_set_item_val("fb.width", NULL, xres);
  404.     sysinfo_set_item_val("fb.height", NULL, yres);
  405.     sysinfo_set_item_val("fb.bpp", NULL, bpp);
  406.     sysinfo_set_item_val("fb.bpp-align", NULL, align);
  407.     sysinfo_set_item_val("fb.scanline", NULL, scan);
  408.     sysinfo_set_item_val("fb.address.physical", NULL, addr);
  409.     sysinfo_set_item_val("fb.invert-colors", NULL, invert_colors);
  410.  
  411.     /* Allocate double buffer */
  412.     int totsize = scanline * yres;
  413.     int pages = SIZE2FRAMES(totsize);
  414.     int order;
  415.     if (pages == 1)
  416.         order = 0;
  417.     else
  418.         order = fnzb(pages-1)+1;
  419.  
  420.     dbbuffer = frame_alloc(order,FRAME_ATOMIC | FRAME_KA);
  421.     if (!dbbuffer)
  422.         printf("Failed to allocate scroll buffer.\n");
  423.     dboffset = 0;
  424.  
  425.     /* Initialized blank line */
  426.     blankline = (uint8_t *) malloc(ROW_BYTES, FRAME_ATOMIC);
  427.     if (!blankline)
  428.         panic("Failed to allocate blank line for framebuffer.");
  429.     for (y=0; y < FONT_SCANLINES; y++) {
  430.         for (x=0; x < xres; x++) {
  431.             (*rgb2scr)(&blankline[POINTPOS(x,y)], COLOR(BGCOLOR));
  432.         }
  433.     }
  434.  
  435.     clear_screen();
  436.  
  437.     /* Update size of screen to match text area */
  438.     yres = rows * FONT_SCANLINES;
  439.  
  440.     draw_logo(xres - helenos_width, 0);
  441.     invert_cursor();
  442.  
  443.     chardev_initialize("fb", &framebuffer, &fb_ops);
  444.     stdout = &framebuffer;
  445.    
  446. }
  447.  
  448. /** @}
  449.  */
  450.