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