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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 char *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. static void draw_text_data(keyfield_t *data)
  155. {
  156.     int i;
  157.  
  158.     for (i = 0; i < scr_width * scr_height; i++) {
  159.         scr_addr[i * 2] = data[i].character;
  160.         scr_addr[i * 2 + 1] = attr_to_ega_style(&data[i].attrs);
  161.     }
  162. }
  163.  
  164. static int save_screen(void)
  165. {
  166.     int i;
  167.  
  168.     for (i = 0; (i < MAX_SAVED_SCREENS) && (saved_screens[i].data); i++)
  169.         ;
  170.     if (i == MAX_SAVED_SCREENS)
  171.         return EINVAL;
  172.     if (!(saved_screens[i].data = malloc(2 * scr_width * scr_height)))
  173.         return ENOMEM;
  174.     memcpy(saved_screens[i].data, scr_addr, 2 * scr_width * scr_height);
  175.  
  176.     return i;
  177. }
  178.  
  179. static int print_screen(int i)
  180. {
  181.     if (saved_screens[i].data)
  182.         memcpy(scr_addr, saved_screens[i].data, 2 * scr_width *
  183.             scr_height);
  184.     else
  185.         return EINVAL;
  186.     return i;
  187. }
  188.  
  189. static int style_to_ega_style(int style)
  190. {
  191.     unsigned int ega_style;
  192.  
  193.     switch (style) {
  194.     case STYLE_NORMAL:
  195.         ega_style = INVERTED_COLOR;
  196.         break;
  197.     case STYLE_EMPHASIS:
  198.         ega_style = INVERTED_COLOR | 4;
  199.         break;
  200.     default:
  201.         return INVERTED_COLOR;
  202.     }
  203.  
  204.     return ega_style;
  205. }
  206.  
  207. static unsigned int color_to_ega_style(int fg_color, int bg_color, int attr)
  208. {
  209.     unsigned int style;
  210.  
  211.     style = (fg_color & 7) | ((bg_color & 7) << 4);
  212.     if (attr & CATTR_BRIGHT)
  213.         style = style | 0x08;
  214.  
  215.     return style;
  216. }
  217.  
  218. static unsigned int rgb_to_ega_style(uint32_t fg, uint32_t bg)
  219. {
  220.     return (fg > bg) ? NORMAL_COLOR : INVERTED_COLOR;
  221. }
  222.  
  223. static unsigned attr_to_ega_style(const attrs_t *a)
  224. {
  225.     switch (a->t) {
  226.     case at_style: return style_to_ega_style(a->a.s.style);
  227.     case at_rgb: return rgb_to_ega_style(a->a.r.fg_color, a->a.r.bg_color);
  228.     case at_idx: return color_to_ega_style(a->a.i.fg_color,
  229.         a->a.i.bg_color, a->a.i.flags);
  230.     default: return INVERTED_COLOR;
  231.     }
  232. }
  233.  
  234. #define FB_WRITE_BUF_SIZE 256
  235. static char fb_write_buf[FB_WRITE_BUF_SIZE];
  236.  
  237. static void fb_write(ipc_callid_t rid, ipc_call_t *request)
  238. {
  239.     int row, col;
  240.     ipc_callid_t callid;
  241.     size_t len;
  242.     size_t i;
  243.  
  244.     row = IPC_GET_ARG1(*request);
  245.     col = IPC_GET_ARG2(*request);
  246.  
  247.     if ((col >= scr_width) || (row >= scr_height)) {
  248.         ipc_answer_0(callid, EINVAL);
  249.         ipc_answer_0(rid, EINVAL);
  250.         return;
  251.     }
  252.  
  253.     if (!ipc_data_write_receive(&callid, &len)) {
  254.         ipc_answer_0(callid, EINVAL);
  255.         ipc_answer_0(rid, EINVAL);
  256.         return;
  257.     }
  258.  
  259.     if (len > FB_WRITE_BUF_SIZE)
  260.         len = FB_WRITE_BUF_SIZE;
  261.     if (len >= scr_width - col)
  262.         len = scr_width - col;
  263.  
  264.     (void) ipc_data_write_finalize(callid, fb_write_buf, len);
  265.  
  266.     for (i = 0; i < len; i++) {
  267.         printchar(fb_write_buf[i], row, col++);
  268.     }
  269.  
  270.     ipc_answer_1(rid, EOK, len);
  271. }
  272.  
  273. static void ega_client_connection(ipc_callid_t iid, ipc_call_t *icall)
  274. {
  275.     int retval;
  276.     ipc_callid_t callid;
  277.     ipc_call_t call;
  278.     char c;
  279.     unsigned int row, col;
  280.     int bg_color, fg_color, attr;
  281.     uint32_t bg_rgb, fg_rgb;
  282.     keyfield_t *interbuf = NULL;
  283.     size_t intersize = 0;
  284.     int i;
  285.  
  286.     if (client_connected) {
  287.         ipc_answer_0(iid, ELIMIT);
  288.         return;
  289.     }
  290.     client_connected = 1;
  291.     ipc_answer_0(iid, EOK); /* Accept connection */
  292.  
  293.     while (1) {
  294.         callid = async_get_call(&call);
  295.         switch (IPC_GET_METHOD(call)) {
  296.         case IPC_M_PHONE_HUNGUP:
  297.             client_connected = 0;
  298.             ipc_answer_0(callid, EOK);
  299.             return; /* Exit thread */
  300.         case IPC_M_SHARE_OUT:
  301.             /* We accept one area for data interchange */
  302.             intersize = IPC_GET_ARG2(call);
  303.             if (intersize >= scr_width * scr_height *
  304.                 sizeof(*interbuf)) {
  305.                 receive_comm_area(callid, &call,
  306.                     (void *) &interbuf);
  307.                 continue;
  308.             }
  309.             retval = EINVAL;
  310.             break;
  311.         case FB_DRAW_TEXT_DATA:
  312.             if (!interbuf) {
  313.                 retval = EINVAL;
  314.                 break;
  315.             }
  316.             draw_text_data(interbuf);
  317.             retval = 0;
  318.             break;
  319.         case FB_GET_CSIZE:
  320.             ipc_answer_2(callid, EOK, scr_height, scr_width);
  321.             continue;
  322.         case FB_CLEAR:
  323.             clrscr();
  324.             retval = 0;
  325.             break;
  326.         case FB_PUTCHAR:
  327.             c = IPC_GET_ARG1(call);
  328.             row = IPC_GET_ARG2(call);
  329.             col = IPC_GET_ARG3(call);
  330.             if (col >= scr_width || row >= scr_height) {
  331.                 retval = EINVAL;
  332.                 break;
  333.             }
  334.             printchar(c, row, col);
  335.             retval = 0;
  336.             break;
  337.         case FB_WRITE:
  338.             fb_write(callid, &call);
  339.  
  340.             /* Message already answered */
  341.             continue;
  342.         case FB_CURSOR_GOTO:
  343.             row = IPC_GET_ARG1(call);
  344.             col = IPC_GET_ARG2(call);
  345.             if (row >= scr_height || col >= scr_width) {
  346.                 retval = EINVAL;
  347.                 break;
  348.             }
  349.             cursor_goto(row, col);
  350.             retval = 0;
  351.             break;
  352.         case FB_SCROLL:
  353.             i = IPC_GET_ARG1(call);
  354.             if (i > scr_height || i < -((int) scr_height)) {
  355.                 retval = EINVAL;
  356.                 break;
  357.             }
  358.             scroll(i);
  359.             retval = 0;
  360.             break;
  361.         case FB_CURSOR_VISIBILITY:
  362.             if (IPC_GET_ARG1(call))
  363.                 cursor_enable();
  364.             else
  365.                 cursor_disable();
  366.             retval = 0;
  367.             break;
  368.         case FB_SET_STYLE:
  369.             style = style_to_ega_style(IPC_GET_ARG1(call));
  370.             retval = 0;
  371.             break;
  372.         case FB_SET_COLOR:
  373.             fg_color = IPC_GET_ARG1(call);
  374.             bg_color = IPC_GET_ARG2(call);
  375.             attr = IPC_GET_ARG3(call);
  376.             style = color_to_ega_style(fg_color, bg_color, attr);
  377.             retval = 0;
  378.             break;
  379.         case FB_SET_RGB_COLOR:
  380.             fg_rgb = IPC_GET_ARG1(call);
  381.             bg_rgb = IPC_GET_ARG2(call);
  382.             style = rgb_to_ega_style(fg_rgb, bg_rgb);
  383.             retval = 0;
  384.             break;
  385.         case FB_VP_DRAW_PIXMAP:
  386.             i = IPC_GET_ARG2(call);
  387.             retval = print_screen(i);
  388.             break;
  389.         case FB_VP2PIXMAP:
  390.             retval = save_screen();
  391.             break;
  392.         case FB_DROP_PIXMAP:
  393.             i = IPC_GET_ARG1(call);
  394.             if (i >= MAX_SAVED_SCREENS) {
  395.                 retval = EINVAL;
  396.                 break;
  397.             }
  398.             if (saved_screens[i].data) {
  399.                 free(saved_screens[i].data);
  400.                 saved_screens[i].data = NULL;
  401.             }
  402.             retval = 0;
  403.             break;
  404.  
  405.         default:
  406.             retval = EINVAL;
  407.         }
  408.         ipc_answer_0(callid, retval);
  409.     }
  410. }
  411.  
  412. int ega_init(void)
  413. {
  414.     void *ega_ph_addr;
  415.     size_t sz;
  416.  
  417.     ega_ph_addr = (void *) sysinfo_value("fb.address.physical");
  418.     scr_width = sysinfo_value("fb.width");
  419.     scr_height = sysinfo_value("fb.height");
  420.  
  421.     if (sysinfo_value("fb.blinking")) {
  422.         ega_normal_color &= 0x77;
  423.         ega_inverted_color &= 0x77;
  424.     }
  425.  
  426.     style = NORMAL_COLOR;
  427.  
  428.     iospace_enable(task_get_id(), (void *) EGA_IO_BASE, 2);
  429.  
  430.     sz = scr_width * scr_height * 2;
  431.     scr_addr = as_get_mappable_page(sz);
  432.  
  433.     if (physmem_map(ega_ph_addr, scr_addr, ALIGN_UP(sz, PAGE_SIZE) >>
  434.         PAGE_WIDTH, AS_AREA_READ | AS_AREA_WRITE) != 0)
  435.         return -1;
  436.  
  437.     async_set_client_connection(ega_client_connection);
  438.  
  439.     return 0;
  440. }
  441.  
  442.  
  443. /**
  444.  * @}
  445.  */
  446.