source: mainline/uspace/srv/fb/ega.c@ 4527fb5

lfn serial ticket/834-toolchain-update topic/msim-upgrade topic/simplify-dev-export
Last change on this file since 4527fb5 was dc033a1, checked in by Jiri Svoboda <jirik.svoboda@…>, 16 years ago

Get rid of FB_WRITE. We can use FB_DRAW_TEXT_DATA if we extend it just a little bit.
  • Property mode set to 100644
File size: 9.9 KB
Line 
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
61typedef struct saved_screen {
62 short *data;
63} saved_screen;
64
65saved_screen saved_screens[MAX_SAVED_SCREENS];
66
67#define EGA_IO_BASE ((ioport8_t *) 0x3d4)
68#define EGA_IO_SIZE 2
69
70int ega_normal_color = 0x0f;
71int 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 */
77static int client_connected = 0;
78
79static unsigned int scr_width;
80static unsigned int scr_height;
81static uint8_t *scr_addr;
82
83static unsigned int style;
84
85static unsigned attr_to_ega_style(const attrs_t *a);
86
87static 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
97static 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
109static 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
119static 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
129static 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
146static 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 */
163static 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
181static 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
196static 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
206static 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
224static 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
235static unsigned int rgb_to_ega_style(uint32_t fg, uint32_t bg)
236{
237 return (fg > bg) ? NORMAL_COLOR : INVERTED_COLOR;
238}
239
240static 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
251static 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
393int 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 */
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