source: mainline/uspace/srv/fb/ega.c@ 7e15496

lfn serial ticket/834-toolchain-update topic/msim-upgrade topic/simplify-dev-export
Last change on this file since 7e15496 was 9cd98796, checked in by Jakub Jermar <jakub@…>, 16 years ago

Use PIO in uspace EGA driver.
  • Property mode set to 100644
File size: 9.2 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 char *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
154static 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
164static 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
179static 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
189static 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
207static 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
218static unsigned int rgb_to_ega_style(uint32_t fg, uint32_t bg)
219{
220 return (fg > bg) ? NORMAL_COLOR : INVERTED_COLOR;
221}
222
223static 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
234static void ega_client_connection(ipc_callid_t iid, ipc_call_t *icall)
235{
236 int retval;
237 ipc_callid_t callid;
238 ipc_call_t call;
239 char c;
240 unsigned int row, col;
241 int bg_color, fg_color, attr;
242 uint32_t bg_rgb, fg_rgb;
243 keyfield_t *interbuf = NULL;
244 size_t intersize = 0;
245 int i;
246
247 if (client_connected) {
248 ipc_answer_0(iid, ELIMIT);
249 return;
250 }
251 client_connected = 1;
252 ipc_answer_0(iid, EOK); /* Accept connection */
253
254 while (1) {
255 callid = async_get_call(&call);
256 switch (IPC_GET_METHOD(call)) {
257 case IPC_M_PHONE_HUNGUP:
258 client_connected = 0;
259 ipc_answer_0(callid, EOK);
260 return; /* Exit thread */
261 case IPC_M_SHARE_OUT:
262 /* We accept one area for data interchange */
263 intersize = IPC_GET_ARG2(call);
264 if (intersize >= scr_width * scr_height *
265 sizeof(*interbuf)) {
266 receive_comm_area(callid, &call,
267 (void *) &interbuf);
268 continue;
269 }
270 retval = EINVAL;
271 break;
272 case FB_DRAW_TEXT_DATA:
273 if (!interbuf) {
274 retval = EINVAL;
275 break;
276 }
277 draw_text_data(interbuf);
278 retval = 0;
279 break;
280 case FB_GET_CSIZE:
281 ipc_answer_2(callid, EOK, scr_height, scr_width);
282 continue;
283 case FB_CLEAR:
284 clrscr();
285 retval = 0;
286 break;
287 case FB_PUTCHAR:
288 c = IPC_GET_ARG1(call);
289 row = IPC_GET_ARG2(call);
290 col = IPC_GET_ARG3(call);
291 if (col >= scr_width || row >= scr_height) {
292 retval = EINVAL;
293 break;
294 }
295 printchar(c, row, col);
296 retval = 0;
297 break;
298 case FB_CURSOR_GOTO:
299 row = IPC_GET_ARG1(call);
300 col = IPC_GET_ARG2(call);
301 if (row >= scr_height || col >= scr_width) {
302 retval = EINVAL;
303 break;
304 }
305 cursor_goto(row, col);
306 retval = 0;
307 break;
308 case FB_SCROLL:
309 i = IPC_GET_ARG1(call);
310 if (i > scr_height || i < -((int) scr_height)) {
311 retval = EINVAL;
312 break;
313 }
314 scroll(i);
315 retval = 0;
316 break;
317 case FB_CURSOR_VISIBILITY:
318 if (IPC_GET_ARG1(call))
319 cursor_enable();
320 else
321 cursor_disable();
322 retval = 0;
323 break;
324 case FB_SET_STYLE:
325 style = style_to_ega_style(IPC_GET_ARG1(call));
326 retval = 0;
327 break;
328 case FB_SET_COLOR:
329 fg_color = IPC_GET_ARG1(call);
330 bg_color = IPC_GET_ARG2(call);
331 attr = IPC_GET_ARG3(call);
332 style = color_to_ega_style(fg_color, bg_color, attr);
333 retval = 0;
334 break;
335 case FB_SET_RGB_COLOR:
336 fg_rgb = IPC_GET_ARG1(call);
337 bg_rgb = IPC_GET_ARG2(call);
338 style = rgb_to_ega_style(fg_rgb, bg_rgb);
339 retval = 0;
340 break;
341 case FB_VP_DRAW_PIXMAP:
342 i = IPC_GET_ARG2(call);
343 retval = print_screen(i);
344 break;
345 case FB_VP2PIXMAP:
346 retval = save_screen();
347 break;
348 case FB_DROP_PIXMAP:
349 i = IPC_GET_ARG1(call);
350 if (i >= MAX_SAVED_SCREENS) {
351 retval = EINVAL;
352 break;
353 }
354 if (saved_screens[i].data) {
355 free(saved_screens[i].data);
356 saved_screens[i].data = NULL;
357 }
358 retval = 0;
359 break;
360
361 default:
362 retval = ENOENT;
363 }
364 ipc_answer_0(callid, retval);
365 }
366}
367
368int ega_init(void)
369{
370 void *ega_ph_addr;
371 size_t sz;
372
373 ega_ph_addr = (void *) sysinfo_value("fb.address.physical");
374 scr_width = sysinfo_value("fb.width");
375 scr_height = sysinfo_value("fb.height");
376
377 if (sysinfo_value("fb.blinking")) {
378 ega_normal_color &= 0x77;
379 ega_inverted_color &= 0x77;
380 }
381
382 style = NORMAL_COLOR;
383
384 iospace_enable(task_get_id(), (void *) EGA_IO_BASE, 2);
385
386 sz = scr_width * scr_height * 2;
387 scr_addr = as_get_mappable_page(sz);
388
389 if (physmem_map(ega_ph_addr, scr_addr, ALIGN_UP(sz, PAGE_SIZE) >>
390 PAGE_WIDTH, AS_AREA_READ | AS_AREA_WRITE) != 0)
391 return -1;
392
393 async_set_client_connection(ega_client_connection);
394
395 return 0;
396}
397
398
399/**
400 * @}
401 */
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