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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. /** @defgroup egafb EGA framebuffer
  30.  * @brief   HelenOS EGA framebuffer.
  31.  * @ingroup fbs
  32.  * @{
  33.  */
  34. /** @file
  35.  */
  36.  
  37. #include <stdlib.h>
  38. #include <unistd.h>
  39. #include <align.h>
  40. #include <async.h>
  41. #include <ipc/ipc.h>
  42. #include <errno.h>
  43. #include <stdio.h>
  44. #include <ddi.h>
  45. #include <sysinfo.h>
  46. #include <as.h>
  47. #include <ipc/fb.h>
  48. #include <ipc/ipc.h>
  49. #include <ipc/ns.h>
  50. #include <ipc/services.h>
  51. #include <libarch/ddi.h>
  52. #include <io/style.h>
  53. #include <io/color.h>
  54. #include <sys/types.h>
  55.  
  56. #include "ega.h"
  57. #include "../console/screenbuffer.h"
  58. #include "main.h"
  59.  
  60. #define MAX_SAVED_SCREENS 256
  61. typedef struct saved_screen {
  62.     short *data;
  63. } saved_screen;
  64.  
  65. saved_screen saved_screens[MAX_SAVED_SCREENS];
  66.  
  67. #define EGA_IO_BASE ((ioport8_t *) 0x3d4)
  68. #define EGA_IO_SIZE 2
  69.  
  70. int ega_normal_color = 0x0f;
  71. int ega_inverted_color = 0xf0;
  72.  
  73. #define NORMAL_COLOR        ega_normal_color
  74. #define INVERTED_COLOR      ega_inverted_color
  75.  
  76. /* Allow only 1 connection */
  77. static int client_connected = 0;
  78.  
  79. static unsigned int scr_width;
  80. static unsigned int scr_height;
  81. static uint8_t *scr_addr;
  82.  
  83. static unsigned int style;
  84.  
  85. static unsigned attr_to_ega_style(const attrs_t *a);
  86. static uint8_t ega_glyph(wchar_t ch);
  87.  
  88. static void clrscr(void)
  89. {
  90.     unsigned i;
  91.    
  92.     for (i = 0; i < scr_width * scr_height; i++) {
  93.         scr_addr[i * 2] = ' ';
  94.         scr_addr[i * 2 + 1] = style;
  95.     }
  96. }
  97.  
  98. static void cursor_goto(unsigned int col, unsigned int row)
  99. {
  100.     int ega_cursor;
  101.  
  102.     ega_cursor = col + scr_width * row;
  103.    
  104.     pio_write_8(EGA_IO_BASE, 0xe);
  105.     pio_write_8(EGA_IO_BASE + 1, (ega_cursor >> 8) & 0xff);
  106.     pio_write_8(EGA_IO_BASE, 0xf);
  107.     pio_write_8(EGA_IO_BASE + 1, ega_cursor & 0xff);
  108. }
  109.  
  110. static void cursor_disable(void)
  111. {
  112.     uint8_t stat;
  113.  
  114.     pio_write_8(EGA_IO_BASE, 0xa);
  115.     stat = pio_read_8(EGA_IO_BASE + 1);
  116.     pio_write_8(EGA_IO_BASE, 0xa);
  117.     pio_write_8(EGA_IO_BASE + 1, stat | (1 << 5));
  118. }
  119.  
  120. static void cursor_enable(void)
  121. {
  122.     uint8_t stat;
  123.  
  124.     pio_write_8(EGA_IO_BASE, 0xa);
  125.     stat = pio_read_8(EGA_IO_BASE + 1);
  126.     pio_write_8(EGA_IO_BASE, 0xa);
  127.     pio_write_8(EGA_IO_BASE + 1, stat & (~(1 << 5)));
  128. }
  129.  
  130. static void scroll(int rows)
  131. {
  132.     unsigned i;
  133.  
  134.     if (rows > 0) {
  135.         memmove(scr_addr, ((char *) scr_addr) + rows * scr_width * 2,
  136.             scr_width * scr_height * 2 - rows * scr_width * 2);
  137.         for (i = 0; i < rows * scr_width; i++)
  138.             (((short *) scr_addr) + scr_width * scr_height - rows *
  139.                 scr_width)[i] = ((style << 8) + ' ');
  140.     } else if (rows < 0) {
  141.         memmove(((char *)scr_addr) - rows * scr_width * 2, scr_addr,
  142.             scr_width * scr_height * 2 + rows * scr_width * 2);
  143.         for (i = 0; i < -rows * scr_width; i++)
  144.             ((short *)scr_addr)[i] = ((style << 8 ) + ' ');
  145.     }
  146. }
  147.  
  148. static void printchar(wchar_t c, unsigned int col, unsigned int row)
  149. {
  150.     scr_addr[(row * scr_width + col) * 2] = ega_glyph(c);
  151.     scr_addr[(row * scr_width + col) * 2 + 1] = style;
  152.    
  153.     cursor_goto(col + 1, row);
  154. }
  155.  
  156. /** Draw text data to viewport.
  157.  *
  158.  * @param vport Viewport id
  159.  * @param data  Text data.
  160.  * @param x Leftmost column of the area.
  161.  * @param y Topmost row of the area.
  162.  * @param w Number of rows.
  163.  * @param h Number of columns.
  164.  */
  165. static void draw_text_data(keyfield_t *data, unsigned int x,
  166.     unsigned int y, unsigned int w, unsigned int h)
  167. {
  168.     unsigned int i, j;
  169.     keyfield_t *field;
  170.     uint8_t *dp;
  171.  
  172.     for (j = 0; j < h; j++) {
  173.         for (i = 0; i < w; i++) {
  174.             field = &data[j * w + i];
  175.             dp = &scr_addr[2 * ((y + j) * scr_width + (x + i))];
  176.  
  177.             dp[0] = ega_glyph(field->character);
  178.             dp[1] = attr_to_ega_style(&field->attrs);
  179.         }
  180.     }
  181. }
  182.  
  183. static int save_screen(void)
  184. {
  185.     int i;
  186.  
  187.     for (i = 0; (i < MAX_SAVED_SCREENS) && (saved_screens[i].data); i++)
  188.         ;
  189.     if (i == MAX_SAVED_SCREENS)
  190.         return EINVAL;
  191.     if (!(saved_screens[i].data = malloc(2 * scr_width * scr_height)))
  192.         return ENOMEM;
  193.     memcpy(saved_screens[i].data, scr_addr, 2 * scr_width * scr_height);
  194.  
  195.     return i;
  196. }
  197.  
  198. static int print_screen(int i)
  199. {
  200.     if (saved_screens[i].data)
  201.         memcpy(scr_addr, saved_screens[i].data, 2 * scr_width *
  202.             scr_height);
  203.     else
  204.         return EINVAL;
  205.     return i;
  206. }
  207.  
  208. static int style_to_ega_style(int style)
  209. {
  210.     unsigned int ega_style;
  211.  
  212.     switch (style) {
  213.     case STYLE_NORMAL:
  214.         ega_style = INVERTED_COLOR;
  215.         break;
  216.     case STYLE_EMPHASIS:
  217.         ega_style = INVERTED_COLOR | 4;
  218.         break;
  219.     default:
  220.         return INVERTED_COLOR;
  221.     }
  222.  
  223.     return ega_style;
  224. }
  225.  
  226. static unsigned int color_to_ega_style(int fg_color, int bg_color, int attr)
  227. {
  228.     unsigned int style;
  229.  
  230.     style = (fg_color & 7) | ((bg_color & 7) << 4);
  231.     if (attr & CATTR_BRIGHT)
  232.         style = style | 0x08;
  233.  
  234.     return style;
  235. }
  236.  
  237. static unsigned int rgb_to_ega_style(uint32_t fg, uint32_t bg)
  238. {
  239.     return (fg > bg) ? NORMAL_COLOR : INVERTED_COLOR;
  240. }
  241.  
  242. static unsigned attr_to_ega_style(const attrs_t *a)
  243. {
  244.     switch (a->t) {
  245.     case at_style:
  246.         return style_to_ega_style(a->a.s.style);
  247.     case at_rgb:
  248.         return rgb_to_ega_style(a->a.r.fg_color, a->a.r.bg_color);
  249.     case at_idx:
  250.         return color_to_ega_style(a->a.i.fg_color,
  251.             a->a.i.bg_color, a->a.i.flags);
  252.     default:
  253.         return INVERTED_COLOR;
  254.     }
  255. }
  256.  
  257. static uint8_t ega_glyph(wchar_t ch)
  258. {
  259.     if (ch >= 0 && ch < 128)
  260.         return ch;
  261.  
  262.     return '?';
  263. }
  264.  
  265. static void ega_client_connection(ipc_callid_t iid, ipc_call_t *icall)
  266. {
  267.     int retval;
  268.     ipc_callid_t callid;
  269.     ipc_call_t call;
  270.     wchar_t c;
  271.     unsigned int row, col, w, h;
  272.     int bg_color, fg_color, attr;
  273.     uint32_t bg_rgb, fg_rgb;
  274.     keyfield_t *interbuf = NULL;
  275.     size_t intersize = 0;
  276.     int i;
  277.  
  278.     if (client_connected) {
  279.         ipc_answer_0(iid, ELIMIT);
  280.         return;
  281.     }
  282.     client_connected = 1;
  283.     ipc_answer_0(iid, EOK); /* Accept connection */
  284.  
  285.     while (1) {
  286.         callid = async_get_call(&call);
  287.         switch (IPC_GET_METHOD(call)) {
  288.         case IPC_M_PHONE_HUNGUP:
  289.             client_connected = 0;
  290.             ipc_answer_0(callid, EOK);
  291.             return; /* Exit thread */
  292.         case IPC_M_SHARE_OUT:
  293.             /* We accept one area for data interchange */
  294.             intersize = IPC_GET_ARG2(call);
  295.             if (intersize >= scr_width * scr_height *
  296.                 sizeof(*interbuf)) {
  297.                 receive_comm_area(callid, &call,
  298.                     (void *) &interbuf);
  299.                 continue;
  300.             }
  301.             retval = EINVAL;
  302.             break;
  303.         case FB_DRAW_TEXT_DATA:
  304.             col = IPC_GET_ARG1(call);
  305.             row = IPC_GET_ARG2(call);
  306.             w = IPC_GET_ARG3(call);
  307.             h = IPC_GET_ARG4(call);
  308.             if (!interbuf) {
  309.                 retval = EINVAL;
  310.                 break;
  311.             }
  312.             if (col + w > scr_width || row + h > scr_height) {
  313.                 retval = EINVAL;
  314.                 break;
  315.             }
  316.             draw_text_data(interbuf, col, row, w, h);
  317.             retval = 0;
  318.             break;
  319.         case FB_GET_CSIZE:
  320.             ipc_answer_2(callid, EOK, scr_width, scr_height);
  321.             continue;
  322.         case FB_GET_COLOR_CAP:
  323.             ipc_answer_1(callid, EOK, FB_CCAP_INDEXED);
  324.             continue;
  325.         case FB_CLEAR:
  326.             clrscr();
  327.             retval = 0;
  328.             break;
  329.         case FB_PUTCHAR:
  330.             c = IPC_GET_ARG1(call);
  331.             col = IPC_GET_ARG2(call);
  332.             row = IPC_GET_ARG3(call);
  333.             if (col >= scr_width || row >= scr_height) {
  334.                 retval = EINVAL;
  335.                 break;
  336.             }
  337.             printchar(c, col, row);
  338.             retval = 0;
  339.             break;
  340.         case FB_CURSOR_GOTO:
  341.             col = IPC_GET_ARG1(call);
  342.             row = IPC_GET_ARG2(call);
  343.             if (row >= scr_height || col >= scr_width) {
  344.                 retval = EINVAL;
  345.                 break;
  346.             }
  347.             cursor_goto(col, row);
  348.             retval = 0;
  349.             break;
  350.         case FB_SCROLL:
  351.             i = IPC_GET_ARG1(call);
  352.             if (i > (int) scr_height || i < -((int) scr_height)) {
  353.                 retval = EINVAL;
  354.                 break;
  355.             }
  356.             scroll(i);
  357.             retval = 0;
  358.             break;
  359.         case FB_CURSOR_VISIBILITY:
  360.             if (IPC_GET_ARG1(call))
  361.                 cursor_enable();
  362.             else
  363.                 cursor_disable();
  364.             retval = 0;
  365.             break;
  366.         case FB_SET_STYLE:
  367.             style = style_to_ega_style(IPC_GET_ARG1(call));
  368.             retval = 0;
  369.             break;
  370.         case FB_SET_COLOR:
  371.             fg_color = IPC_GET_ARG1(call);
  372.             bg_color = IPC_GET_ARG2(call);
  373.             attr = IPC_GET_ARG3(call);
  374.             style = color_to_ega_style(fg_color, bg_color, attr);
  375.             retval = 0;
  376.             break;
  377.         case FB_SET_RGB_COLOR:
  378.             fg_rgb = IPC_GET_ARG1(call);
  379.             bg_rgb = IPC_GET_ARG2(call);
  380.             style = rgb_to_ega_style(fg_rgb, bg_rgb);
  381.             retval = 0;
  382.             break;
  383.         case FB_VP_DRAW_PIXMAP:
  384.             i = IPC_GET_ARG2(call);
  385.             retval = print_screen(i);
  386.             break;
  387.         case FB_VP2PIXMAP:
  388.             retval = save_screen();
  389.             break;
  390.         case FB_DROP_PIXMAP:
  391.             i = IPC_GET_ARG1(call);
  392.             if (i >= MAX_SAVED_SCREENS) {
  393.                 retval = EINVAL;
  394.                 break;
  395.             }
  396.             if (saved_screens[i].data) {
  397.                 free(saved_screens[i].data);
  398.                 saved_screens[i].data = NULL;
  399.             }
  400.             retval = 0;
  401.             break;
  402.         case FB_SCREEN_YIELD:
  403.         case FB_SCREEN_RECLAIM:
  404.             retval = EOK;
  405.             break;
  406.         default:
  407.             retval = EINVAL;
  408.         }
  409.         ipc_answer_0(callid, retval);
  410.     }
  411. }
  412.  
  413. int ega_init(void)
  414. {
  415.     void *ega_ph_addr;
  416.     size_t sz;
  417.  
  418.     ega_ph_addr = (void *) sysinfo_value("fb.address.physical");
  419.     scr_width = sysinfo_value("fb.width");
  420.     scr_height = sysinfo_value("fb.height");
  421.  
  422.     if (sysinfo_value("fb.blinking")) {
  423.         ega_normal_color &= 0x77;
  424.         ega_inverted_color &= 0x77;
  425.     }
  426.  
  427.     style = NORMAL_COLOR;
  428.  
  429.     iospace_enable(task_get_id(), (void *) EGA_IO_BASE, 2);
  430.  
  431.     sz = scr_width * scr_height * 2;
  432.     scr_addr = as_get_mappable_page(sz);
  433.  
  434.     if (physmem_map(ega_ph_addr, scr_addr, ALIGN_UP(sz, PAGE_SIZE) >>
  435.         PAGE_WIDTH, AS_AREA_READ | AS_AREA_WRITE) != 0)
  436.         return -1;
  437.  
  438.     async_set_client_connection(ega_client_connection);
  439.  
  440.     return 0;
  441. }
  442.  
  443.  
  444. /**
  445.  * @}
  446.  */
  447.