source: mainline/uspace/srv/fb/ega.c@ cc76be3

lfn serial ticket/834-toolchain-update topic/msim-upgrade topic/simplify-dev-export
Last change on this file since cc76be3 was b74959bd, checked in by Jakub Jermar <jakub@…>, 18 years ago

Modify ipc_answer_*() to make use of all six syscall arguments. The recommended
means of answering calls is via the ipc_answer_m() macros (where m denotes the
number of return arguments) that automatically decide between the fast register
version or the slow universal version of ipc_answer().
  • Property mode set to 100644
File size: 7.7 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
53#include "ega.h"
54#include "../console/screenbuffer.h"
55#include "main.h"
56
57#define MAX_SAVED_SCREENS 256
58typedef struct saved_screen {
59 short *data;
60} saved_screen;
61
62saved_screen saved_screens[MAX_SAVED_SCREENS];
63
64#define EGA_IO_ADDRESS 0x3d4
65#define EGA_IO_SIZE 2
66
67#define NORMAL_COLOR 0x0f
68#define INVERTED_COLOR 0xf0
69
70#define EGA_STYLE(fg,bg) ((fg) > (bg) ? NORMAL_COLOR : INVERTED_COLOR)
71
72/* Allow only 1 connection */
73static int client_connected = 0;
74
75static unsigned int scr_width;
76static unsigned int scr_height;
77static char *scr_addr;
78
79static unsigned int style = NORMAL_COLOR;
80
81static void clrscr(void)
82{
83 int i;
84
85 for (i = 0; i < scr_width * scr_height; i++) {
86 scr_addr[i * 2] = ' ';
87 scr_addr[i * 2 + 1] = style;
88 }
89}
90
91static void cursor_goto(unsigned int row, unsigned int col)
92{
93 int ega_cursor;
94
95 ega_cursor = col + scr_width * row;
96
97 outb(EGA_IO_ADDRESS, 0xe);
98 outb(EGA_IO_ADDRESS + 1, (ega_cursor >> 8) & 0xff);
99 outb(EGA_IO_ADDRESS, 0xf);
100 outb(EGA_IO_ADDRESS + 1, ega_cursor & 0xff);
101}
102
103static void cursor_disable(void)
104{
105 uint8_t stat;
106
107 outb(EGA_IO_ADDRESS, 0xa);
108 stat=inb(EGA_IO_ADDRESS + 1);
109 outb(EGA_IO_ADDRESS, 0xa);
110 outb(EGA_IO_ADDRESS + 1, stat | (1 << 5));
111}
112
113static void cursor_enable(void)
114{
115 uint8_t stat;
116
117 outb(EGA_IO_ADDRESS, 0xa);
118 stat=inb(EGA_IO_ADDRESS + 1);
119 outb(EGA_IO_ADDRESS, 0xa);
120 outb(EGA_IO_ADDRESS + 1, stat & (~(1 << 5)));
121}
122
123static void scroll(int rows)
124{
125 int i;
126 if (rows > 0) {
127 memcpy(scr_addr, ((char *) scr_addr) + rows * scr_width * 2,
128 scr_width * scr_height * 2 - rows * scr_width * 2);
129 for (i = 0; i < rows * scr_width; i++)
130 (((short *) scr_addr) + scr_width * scr_height - rows *
131 scr_width)[i] = ((style << 8) + ' ');
132 } else if (rows < 0) {
133 memcpy(((char *)scr_addr) - rows * scr_width * 2, scr_addr,
134 scr_width * scr_height * 2 + rows * scr_width * 2);
135 for (i = 0; i < -rows * scr_width; i++)
136 ((short *)scr_addr)[i] = ((style << 8 ) + ' ');
137 }
138}
139
140static void printchar(char c, unsigned int row, unsigned int col)
141{
142 scr_addr[(row * scr_width + col) * 2] = c;
143 scr_addr[(row * scr_width + col) * 2 + 1] = style;
144
145 cursor_goto(row, col + 1);
146}
147
148static void draw_text_data(keyfield_t *data)
149{
150 int i;
151
152 for (i = 0; i < scr_width * scr_height; i++) {
153 scr_addr[i * 2] = data[i].character;
154 scr_addr[i * 2 + 1] = EGA_STYLE(data[i].style.fg_color,
155 data[i].style.bg_color);
156 }
157}
158
159static int save_screen(void)
160{
161 int i;
162
163 for (i = 0; (i < MAX_SAVED_SCREENS) && (saved_screens[i].data); i++)
164 ;
165 if (i == MAX_SAVED_SCREENS)
166 return EINVAL;
167 if (!(saved_screens[i].data = malloc(2 * scr_width * scr_height)))
168 return ENOMEM;
169 memcpy(saved_screens[i].data, scr_addr, 2 * scr_width * scr_height);
170
171 return i;
172}
173
174static int print_screen(int i)
175{
176 if (saved_screens[i].data)
177 memcpy(scr_addr, saved_screens[i].data, 2 * scr_width *
178 scr_height);
179 else
180 return EINVAL;
181 return i;
182}
183
184
185static void ega_client_connection(ipc_callid_t iid, ipc_call_t *icall)
186{
187 int retval;
188 ipc_callid_t callid;
189 ipc_call_t call;
190 char c;
191 unsigned int row, col;
192 int bgcolor,fgcolor;
193 keyfield_t *interbuf = NULL;
194 size_t intersize = 0;
195 int i;
196
197 if (client_connected) {
198 ipc_answer_0(iid, ELIMIT);
199 return;
200 }
201 client_connected = 1;
202 ipc_answer_0(iid, EOK); /* Accept connection */
203
204 while (1) {
205 callid = async_get_call(&call);
206 switch (IPC_GET_METHOD(call)) {
207 case IPC_M_PHONE_HUNGUP:
208 client_connected = 0;
209 ipc_answer_0(callid, EOK);
210 return; /* Exit thread */
211 case IPC_M_AS_AREA_SEND:
212 /* We accept one area for data interchange */
213 intersize = IPC_GET_ARG2(call);
214 if (intersize >= scr_width * scr_height *
215 sizeof(*interbuf)) {
216 receive_comm_area(callid, &call,
217 (void *) &interbuf);
218 continue;
219 }
220 retval = EINVAL;
221 break;
222 case FB_DRAW_TEXT_DATA:
223 if (!interbuf) {
224 retval = EINVAL;
225 break;
226 }
227 draw_text_data(interbuf);
228 retval = 0;
229 break;
230 case FB_GET_CSIZE:
231 ipc_answer_2(callid, EOK, scr_height, scr_width);
232 continue;
233 case FB_CLEAR:
234 clrscr();
235 retval = 0;
236 break;
237 case FB_PUTCHAR:
238 c = IPC_GET_ARG1(call);
239 row = IPC_GET_ARG2(call);
240 col = IPC_GET_ARG3(call);
241 if (col >= scr_width || row >= scr_height) {
242 retval = EINVAL;
243 break;
244 }
245 printchar(c, row, col);
246 retval = 0;
247 break;
248 case FB_CURSOR_GOTO:
249 row = IPC_GET_ARG1(call);
250 col = IPC_GET_ARG2(call);
251 if (row >= scr_height || col >= scr_width) {
252 retval = EINVAL;
253 break;
254 }
255 cursor_goto(row, col);
256 retval = 0;
257 break;
258 case FB_SCROLL:
259 i = IPC_GET_ARG1(call);
260 if (i > scr_height || i < -((int) scr_height)) {
261 retval = EINVAL;
262 break;
263 }
264 scroll(i);
265 retval = 0;
266 break;
267 case FB_CURSOR_VISIBILITY:
268 if(IPC_GET_ARG1(call))
269 cursor_enable();
270 else
271 cursor_disable();
272 retval = 0;
273 break;
274 case FB_SET_STYLE:
275 fgcolor = IPC_GET_ARG1(call);
276 bgcolor = IPC_GET_ARG2(call);
277 style = EGA_STYLE(fgcolor, bgcolor);
278 retval = 0;
279 break;
280 case FB_VP_DRAW_PIXMAP:
281 i = IPC_GET_ARG2(call);
282 retval = print_screen(i);
283 break;
284 case FB_VP2PIXMAP:
285 retval = save_screen();
286 break;
287 case FB_DROP_PIXMAP:
288 i = IPC_GET_ARG1(call);
289 if (i >= MAX_SAVED_SCREENS) {
290 retval = EINVAL;
291 break;
292 }
293 if (saved_screens[i].data) {
294 free(saved_screens[i].data);
295 saved_screens[i].data = NULL;
296 }
297 retval = 0;
298 break;
299
300 default:
301 retval = ENOENT;
302 }
303 ipc_answer_0(callid, retval);
304 }
305}
306
307int ega_init(void)
308{
309 void *ega_ph_addr;
310 size_t sz;
311
312 ega_ph_addr = (void *) sysinfo_value("fb.address.physical");
313 scr_width = sysinfo_value("fb.width");
314 scr_height = sysinfo_value("fb.height");
315 iospace_enable(task_get_id(), (void *) EGA_IO_ADDRESS, 2);
316
317 sz = scr_width * scr_height * 2;
318 scr_addr = as_get_mappable_page(sz);
319
320 physmem_map(ega_ph_addr, scr_addr, ALIGN_UP(sz, PAGE_SIZE) >>
321 PAGE_WIDTH, AS_AREA_READ | AS_AREA_WRITE);
322
323 async_set_client_connection(ega_client_connection);
324
325 return 0;
326}
327
328
329/**
330 * @}
331 */
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