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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. #include <ddi/ddi.h>
  49.  
  50. #include "helenos.xbm"
  51.  
  52. static parea_t fb_parea;        /**< Physical memory area for fb. */
  53.  
  54. SPINLOCK_INITIALIZE(fb_lock);
  55.  
  56. static uint8_t *fbaddress = NULL;
  57.  
  58. static uint8_t *blankline = NULL;
  59. static uint8_t *dbbuffer = NULL; /* Buffer for fast scrolling console */
  60. static int dboffset;
  61.  
  62. static unsigned int xres = 0;
  63. static unsigned int yres = 0;
  64. static unsigned int scanline = 0;
  65. static unsigned int pixelbytes = 0;
  66. #ifdef FB_INVERT_COLORS
  67. static bool invert_colors = true;
  68. #else
  69. static bool invert_colors = false;
  70. #endif
  71.  
  72. static unsigned int position = 0;
  73. static unsigned int columns = 0;
  74. static unsigned int rows = 0;
  75.  
  76. #define COL_WIDTH   8
  77. #define ROW_BYTES   (scanline * FONT_SCANLINES)
  78.  
  79. #define BGCOLOR     0x000080
  80. #define FGCOLOR     0xffff00
  81. #define LOGOCOLOR   0x2020b0
  82.  
  83. #define RED(x, bits)    ((x >> (16 + 8 - bits)) & ((1 << bits) - 1))
  84. #define GREEN(x, bits)  ((x >> (8 + 8 - bits)) & ((1 << bits) - 1))
  85. #define BLUE(x, bits)   ((x >> (8 - bits)) & ((1 << bits) - 1))
  86.  
  87. #define POINTPOS(x, y)  ((y) * scanline + (x) * pixelbytes)
  88.  
  89. /***************************************************************/
  90. /* Pixel specific fuctions */
  91.  
  92. static void (*rgb2scr)(void *, int);
  93. static int (*scr2rgb)(void *);
  94.  
  95. static inline int COLOR(int color)
  96. {
  97.     return invert_colors ? ~color : color;
  98. }
  99.  
  100. /* Conversion routines between different color representations */
  101. static void rgb_byte0888(void *dst, int rgb)
  102. {
  103.     *((int *) dst) = rgb;
  104. }
  105.  
  106. static int byte0888_rgb(void *src)
  107. {
  108.     return (*((int *) src)) & 0xffffff;
  109. }
  110.  
  111. static void bgr_byte0888(void *dst, int rgb)
  112. {
  113.     *((uint32_t *) dst) = BLUE(rgb, 8) << 16 | GREEN(rgb, 8) << 8 | RED(rgb, 8);
  114. }
  115.  
  116. static int byte0888_bgr(void *src)
  117. {
  118.     int color = *(uint32_t *)(src);
  119.     return ((color & 0xff) << 16) | (((color >> 8) & 0xff) << 8) | ((color >> 16) & 0xff);
  120. }
  121.  
  122. static void rgb_byte888(void *dst, int rgb)
  123. {
  124.     uint8_t *scr = dst;
  125. #if defined(FB_INVERT_ENDIAN)
  126.     scr[0] = RED(rgb, 8);
  127.     scr[1] = GREEN(rgb, 8);
  128.     scr[2] = BLUE(rgb, 8);
  129. #else
  130.     scr[2] = RED(rgb, 8);
  131.     scr[1] = GREEN(rgb, 8);
  132.     scr[0] = BLUE(rgb, 8);
  133. #endif
  134. }
  135.  
  136. static int byte888_rgb(void *src)
  137. {
  138.     uint8_t *scr = src;
  139. #if defined(FB_INVERT_ENDIAN)
  140.     return scr[0] << 16 | scr[1] << 8 | scr[2];
  141. #else
  142.     return scr[2] << 16 | scr[1] << 8 | scr[0];
  143. #endif 
  144. }
  145.  
  146. /**  16-bit depth (5:5:5) */
  147. static void rgb_byte555(void *dst, int rgb)
  148. {
  149.     /* 5-bit, 5-bits, 5-bits */
  150.     *((uint16_t *) dst) = RED(rgb, 5) << 10 | GREEN(rgb, 5) << 5 | BLUE(rgb, 5);
  151. }
  152.  
  153. /** 16-bit depth (5:5:5) */
  154. static int byte555_rgb(void *src)
  155. {
  156.     int color = *(uint16_t *)(src);
  157.     return (((color >> 10) & 0x1f) << (16 + 3)) | (((color >> 5) & 0x1f) << (8 + 3)) | ((color & 0x1f) << 3);
  158. }
  159.  
  160. /**  16-bit depth (5:6:5) */
  161. static void rgb_byte565(void *dst, int rgb)
  162. {
  163.     /* 5-bit, 6-bits, 5-bits */
  164.     *((uint16_t *) dst) = RED(rgb, 5) << 11 | GREEN(rgb, 6) << 5 | BLUE(rgb, 5);
  165. }
  166.  
  167. /** 16-bit depth (5:6:5) */
  168. static int byte565_rgb(void *src)
  169. {
  170.     int color = *(uint16_t *)(src);
  171.     return (((color >> 11) & 0x1f) << (16 + 3)) | (((color >> 5) & 0x3f) << (8 + 2)) | ((color & 0x1f) << 3);
  172. }
  173.  
  174. /** Put pixel - 8-bit depth (color palette/3:2:3)
  175.  *
  176.  * Even though we try 3:2:3 color scheme here, an 8-bit framebuffer
  177.  * will most likely use a color palette. The color appearance
  178.  * will be pretty random and depend on the default installed
  179.  * palette. This could be fixed by supporting custom palette
  180.  * and setting it to simulate the 8-bit truecolor.
  181.  */
  182. static void rgb_byte8(void *dst, int rgb)
  183. {
  184.     *((uint8_t *) dst) = RED(rgb, 3) << 5 | GREEN(rgb, 2) << 3 | BLUE(rgb, 3);
  185. }
  186.  
  187. /** Return pixel color - 8-bit depth (color palette/3:2:3)
  188.  *
  189.  * See the comment for rgb_byte().
  190.  */
  191. static int byte8_rgb(void *src)
  192. {
  193.     int color = *(uint8_t *)src;
  194.     return (((color >> 5) & 0x7) << (16 + 5)) | (((color >> 3) & 0x3) << (8 + 6)) | ((color & 0x7) << 5);
  195. }
  196.  
  197. static void putpixel(unsigned int x, unsigned int y, int color)
  198. {
  199.     (*rgb2scr)(&fbaddress[POINTPOS(x, y)], COLOR(color));
  200.  
  201.     if (dbbuffer) {
  202.         int dline = (y + dboffset) % yres;
  203.         (*rgb2scr)(&dbbuffer[POINTPOS(x, dline)], COLOR(color));
  204.     }
  205. }
  206.  
  207. /** Get pixel from viewport */
  208. static int getpixel(unsigned int x, unsigned int y)
  209. {
  210.     if (dbbuffer) {
  211.         int dline = (y + dboffset) % yres;
  212.         return COLOR((*scr2rgb)(&dbbuffer[POINTPOS(x, dline)]));
  213.     }
  214.     return COLOR((*scr2rgb)(&fbaddress[POINTPOS(x, y)]));
  215. }
  216.  
  217.  
  218. /** Fill screen with background color */
  219. static void clear_screen(void)
  220. {
  221.     unsigned int y;
  222.  
  223.     for (y = 0; y < yres; y++) {
  224.         memcpy(&fbaddress[scanline * y], blankline, xres * pixelbytes);
  225.         if (dbbuffer)
  226.             memcpy(&dbbuffer[scanline * y], blankline, xres * pixelbytes);
  227.     }
  228. }
  229.  
  230.  
  231. /** Scroll screen one row up */
  232. static void scroll_screen(void)
  233. {
  234.     uint8_t *lastline = &fbaddress[(rows - 1) * ROW_BYTES];
  235.     int firstsz;
  236.  
  237.     if (dbbuffer) {
  238.         memcpy(&dbbuffer[dboffset * scanline], blankline, ROW_BYTES);
  239.        
  240.         dboffset = (dboffset + FONT_SCANLINES) % yres;
  241.         firstsz = yres - dboffset;
  242.  
  243.         memcpy(fbaddress, &dbbuffer[scanline * dboffset], firstsz * scanline);
  244.         memcpy(&fbaddress[firstsz * scanline], dbbuffer, dboffset * scanline);
  245.     } else {
  246.         memcpy((void *) fbaddress, (void *) &fbaddress[ROW_BYTES], scanline * yres - ROW_BYTES);
  247.         /* Clear last row */
  248.         memcpy((void *) lastline, (void *) blankline, ROW_BYTES);
  249.     }
  250. }
  251.  
  252.  
  253. static void invert_pixel(unsigned int x, unsigned int y)
  254. {
  255.     putpixel(x, y, ~getpixel(x, y));
  256. }
  257.  
  258.  
  259. /** Draw one line of glyph at a given position */
  260. static void draw_glyph_line(unsigned int glline, unsigned int x, unsigned int y)
  261. {
  262.     unsigned int i;
  263.  
  264.     for (i = 0; i < 8; i++)
  265.         if (glline & (1 << (7 - i))) {
  266.             putpixel(x + i, y, FGCOLOR);
  267.         } else
  268.             putpixel(x + i, y, BGCOLOR);
  269. }
  270.  
  271. /***************************************************************/
  272. /* Character-console functions */
  273.  
  274. /** Draw character at given position */
  275. static void draw_glyph(uint8_t glyph, unsigned int col, unsigned int row)
  276. {
  277.     unsigned int y;
  278.  
  279.     for (y = 0; y < FONT_SCANLINES; y++)
  280.         draw_glyph_line(fb_font[glyph * FONT_SCANLINES + y], col * COL_WIDTH, row * FONT_SCANLINES + y);
  281. }
  282.  
  283. /** Invert character at given position */
  284. static void invert_char(unsigned int col, unsigned int row)
  285. {
  286.     unsigned int x;
  287.     unsigned int y;
  288.  
  289.     for (x = 0; x < COL_WIDTH; x++)
  290.         for (y = 0; y < FONT_SCANLINES; y++)
  291.             invert_pixel(col * COL_WIDTH + x, row * FONT_SCANLINES + y);
  292. }
  293.  
  294. /** Draw character at default position */
  295. static void draw_char(char chr)
  296. {
  297.     draw_glyph(chr, position % columns, position / columns);
  298. }
  299.  
  300. static void draw_logo(unsigned int startx, unsigned int starty)
  301. {
  302.     unsigned int x;
  303.     unsigned int y;
  304.     unsigned int byte;
  305.     unsigned int rowbytes;
  306.  
  307.     rowbytes = (helenos_width - 1) / 8 + 1;
  308.  
  309.     for (y = 0; y < helenos_height; y++)
  310.         for (x = 0; x < helenos_width; x++) {
  311.             byte = helenos_bits[rowbytes * y + x / 8];
  312.             byte >>= x % 8;
  313.             if (byte & 1)
  314.                 putpixel(startx + x, starty + y, COLOR(LOGOCOLOR));
  315.         }
  316. }
  317.  
  318. /***************************************************************/
  319. /* Stdout specific functions */
  320.  
  321. static void invert_cursor(void)
  322. {
  323.     invert_char(position % columns, position / columns);
  324. }
  325.  
  326. /** Print character to screen
  327.  *
  328.  *  Emulate basic terminal commands
  329.  */
  330. static void fb_putchar(chardev_t *dev, char ch)
  331. {
  332.     spinlock_lock(&fb_lock);
  333.    
  334.     switch (ch) {
  335.     case '\n':
  336.         invert_cursor();
  337.         position += columns;
  338.         position -= position % columns;
  339.         break;
  340.     case '\r':
  341.         invert_cursor();
  342.         position -= position % columns;
  343.         break;
  344.     case '\b':
  345.         invert_cursor();
  346.         if (position % columns)
  347.             position--;
  348.         break;
  349.     case '\t':
  350.         invert_cursor();
  351.         do {
  352.             draw_char(' ');
  353.             position++;
  354.         } while ((position % 8) && position < columns * rows);
  355.         break;
  356.     default:
  357.         draw_char(ch);
  358.         position++;
  359.     }
  360.    
  361.     if (position >= columns * rows) {
  362.         position -= columns;
  363.         scroll_screen();
  364.     }
  365.    
  366.     invert_cursor();
  367.    
  368.     spinlock_unlock(&fb_lock);
  369. }
  370.  
  371. static chardev_t framebuffer;
  372. static chardev_operations_t fb_ops = {
  373.     .write = fb_putchar,
  374. };
  375.  
  376.  
  377. /** Initialize framebuffer as a chardev output device
  378.  *
  379.  * @param addr   Physical address of the framebuffer
  380.  * @param x      Screen width in pixels
  381.  * @param y      Screen height in pixels
  382.  * @param scan   Bytes per one scanline
  383.  * @param visual Color model
  384.  *
  385.  */
  386. void fb_init(uintptr_t addr, unsigned int x, unsigned int y, unsigned int scan, unsigned int visual)
  387. {
  388.     switch (visual) {
  389.     case VISUAL_INDIRECT_8:
  390.         rgb2scr = rgb_byte8;
  391.         scr2rgb = byte8_rgb;
  392.         pixelbytes = 1;
  393.         break;
  394.     case VISUAL_RGB_5_5_5:
  395.         rgb2scr = rgb_byte555;
  396.         scr2rgb = byte555_rgb;
  397.         pixelbytes = 2;
  398.         break;
  399.     case VISUAL_RGB_5_6_5:
  400.         rgb2scr = rgb_byte565;
  401.         scr2rgb = byte565_rgb;
  402.         pixelbytes = 2;
  403.         break;
  404.     case VISUAL_RGB_8_8_8:
  405.         rgb2scr = rgb_byte888;
  406.         scr2rgb = byte888_rgb;
  407.         pixelbytes = 3;
  408.         break;
  409.     case VISUAL_RGB_8_8_8_0:
  410.         rgb2scr = rgb_byte888;
  411.         scr2rgb = byte888_rgb;
  412.         pixelbytes = 4;
  413.         break;
  414.     case VISUAL_RGB_0_8_8_8:
  415.         rgb2scr = rgb_byte0888;
  416.         scr2rgb = byte0888_rgb;
  417.         pixelbytes = 4;
  418.         break;
  419.     case VISUAL_BGR_0_8_8_8:
  420.         rgb2scr = bgr_byte0888;
  421.         scr2rgb = byte0888_bgr;
  422.         pixelbytes = 4;
  423.         break;
  424.     default:
  425.         panic("Unsupported visual.\n");
  426.     }
  427.    
  428.     unsigned int fbsize = scan * y;
  429.    
  430.     /* Map the framebuffer */
  431.     fbaddress = (uint8_t *) hw_map((uintptr_t) addr, fbsize);
  432.    
  433.     xres = x;
  434.     yres = y;
  435.     scanline = scan;
  436.    
  437.     rows = y / FONT_SCANLINES;
  438.     columns = x / COL_WIDTH;
  439.  
  440.     fb_parea.pbase = (uintptr_t) addr;
  441.     fb_parea.vbase = (uintptr_t) fbaddress;
  442.     fb_parea.frames = SIZE2FRAMES(fbsize);
  443.     fb_parea.cacheable = false;
  444.     ddi_parea_register(&fb_parea);
  445.  
  446.     sysinfo_set_item_val("fb", NULL, true);
  447.     sysinfo_set_item_val("fb.kind", NULL, 1);
  448.     sysinfo_set_item_val("fb.width", NULL, xres);
  449.     sysinfo_set_item_val("fb.height", NULL, yres);
  450.     sysinfo_set_item_val("fb.scanline", NULL, scan);
  451.     sysinfo_set_item_val("fb.visual", NULL, visual);
  452.     sysinfo_set_item_val("fb.address.physical", NULL, addr);
  453.     sysinfo_set_item_val("fb.address.color", NULL, PAGE_COLOR((uintptr_t)
  454.         fbaddress));
  455.     sysinfo_set_item_val("fb.invert-colors", NULL, invert_colors);
  456.  
  457.     /* Allocate double buffer */
  458.     unsigned int order = fnzb(SIZE2FRAMES(ALIGN_UP(fbsize, FRAME_SIZE))) + 1;
  459.     dbbuffer = (uint8_t * ) frame_alloc(order, FRAME_ATOMIC | FRAME_KA);
  460.     if (!dbbuffer)
  461.         printf("Failed to allocate scroll buffer.\n");
  462.     dboffset = 0;
  463.  
  464.     /* Initialized blank line */
  465.     blankline = (uint8_t *) malloc(ROW_BYTES, FRAME_ATOMIC);
  466.     if (!blankline)
  467.         panic("Failed to allocate blank line for framebuffer.");
  468.     for (y = 0; y < FONT_SCANLINES; y++)
  469.         for (x = 0; x < xres; x++)
  470.             (*rgb2scr)(&blankline[POINTPOS(x, y)], COLOR(BGCOLOR));
  471.    
  472.     clear_screen();
  473.  
  474.     /* Update size of screen to match text area */
  475.     yres = rows * FONT_SCANLINES;
  476.  
  477.     draw_logo(xres - helenos_width, 0);
  478.     invert_cursor();
  479.  
  480.     chardev_initialize("fb", &framebuffer, &fb_ops);
  481.     stdout = &framebuffer;
  482. }
  483.  
  484. /** @}
  485.  */
  486.