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4419 trochtova 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>
4537 trochtova 52
#include <io/style.h>
53
#include <io/color.h>
4419 trochtova 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
 
4537 trochtova 73
#define NORMAL_COLOR        ega_normal_color
4419 trochtova 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
static uint8_t ega_glyph(wchar_t ch);
87
 
88
static void clrscr(void)
89
{
4668 trochtova 90
    unsigned i;
4419 trochtova 91
 
92
    for (i = 0; i < scr_width * scr_height; i++) {
93
        scr_addr[i * 2] = ' ';
94
        scr_addr[i * 2 + 1] = style;
95
    }
96
}
97
 
4537 trochtova 98
static void cursor_goto(unsigned int col, unsigned int row)
4419 trochtova 99
{
100
    int ega_cursor;
101
 
102
    ega_cursor = col + scr_width * row;
103
 
104
    pio_write_8(EGA_IO_BASE, 0xe);
105
    pio_write_8(EGA_IO_BASE + 1, (ega_cursor >> 8) & 0xff);
106
    pio_write_8(EGA_IO_BASE, 0xf);
107
    pio_write_8(EGA_IO_BASE + 1, ega_cursor & 0xff);
108
}
109
 
110
static void cursor_disable(void)
111
{
112
    uint8_t stat;
113
 
114
    pio_write_8(EGA_IO_BASE, 0xa);
115
    stat = pio_read_8(EGA_IO_BASE + 1);
116
    pio_write_8(EGA_IO_BASE, 0xa);
117
    pio_write_8(EGA_IO_BASE + 1, stat | (1 << 5));
118
}
119
 
120
static void cursor_enable(void)
121
{
122
    uint8_t stat;
123
 
124
    pio_write_8(EGA_IO_BASE, 0xa);
125
    stat = pio_read_8(EGA_IO_BASE + 1);
126
    pio_write_8(EGA_IO_BASE, 0xa);
127
    pio_write_8(EGA_IO_BASE + 1, stat & (~(1 << 5)));
128
}
129
 
130
static void scroll(int rows)
131
{
4668 trochtova 132
    unsigned i;
133
 
4419 trochtova 134
    if (rows > 0) {
135
        memmove(scr_addr, ((char *) scr_addr) + rows * scr_width * 2,
136
            scr_width * scr_height * 2 - rows * scr_width * 2);
137
        for (i = 0; i < rows * scr_width; i++)
138
            (((short *) scr_addr) + scr_width * scr_height - rows *
139
                scr_width)[i] = ((style << 8) + ' ');
140
    } else if (rows < 0) {
141
        memmove(((char *)scr_addr) - rows * scr_width * 2, scr_addr,
142
            scr_width * scr_height * 2 + rows * scr_width * 2);
143
        for (i = 0; i < -rows * scr_width; i++)
144
            ((short *)scr_addr)[i] = ((style << 8 ) + ' ');
145
    }
146
}
147
 
4537 trochtova 148
static void printchar(wchar_t c, unsigned int col, unsigned int row)
4419 trochtova 149
{
150
    scr_addr[(row * scr_width + col) * 2] = ega_glyph(c);
151
    scr_addr[(row * scr_width + col) * 2 + 1] = style;
152
 
4537 trochtova 153
    cursor_goto(col + 1, row);
4419 trochtova 154
}
155
 
156
/** Draw text data to viewport.
157
 *
158
 * @param vport Viewport id
159
 * @param data  Text data.
160
 * @param x Leftmost column of the area.
161
 * @param y Topmost row of the area.
162
 * @param w Number of rows.
163
 * @param h Number of columns.
164
 */
165
static void draw_text_data(keyfield_t *data, unsigned int x,
166
    unsigned int y, unsigned int w, unsigned int h)
167
{
168
    unsigned int i, j;
169
    keyfield_t *field;
170
    uint8_t *dp;
171
 
172
    for (j = 0; j < h; j++) {
173
        for (i = 0; i < w; i++) {
174
            field = &data[j * w + i];
175
            dp = &scr_addr[2 * ((y + j) * scr_width + (x + i))];
176
 
177
            dp[0] = ega_glyph(field->character);
178
            dp[1] = attr_to_ega_style(&field->attrs);
179
        }
180
    }
181
}
182
 
183
static int save_screen(void)
184
{
185
    int i;
186
 
187
    for (i = 0; (i < MAX_SAVED_SCREENS) && (saved_screens[i].data); i++)
188
        ;
189
    if (i == MAX_SAVED_SCREENS)
190
        return EINVAL;
191
    if (!(saved_screens[i].data = malloc(2 * scr_width * scr_height)))
192
        return ENOMEM;
193
    memcpy(saved_screens[i].data, scr_addr, 2 * scr_width * scr_height);
194
 
195
    return i;
196
}
197
 
198
static int print_screen(int i)
199
{
200
    if (saved_screens[i].data)
201
        memcpy(scr_addr, saved_screens[i].data, 2 * scr_width *
202
            scr_height);
203
    else
204
        return EINVAL;
205
    return i;
206
}
207
 
208
static int style_to_ega_style(int style)
209
{
210
    unsigned int ega_style;
211
 
212
    switch (style) {
213
    case STYLE_NORMAL:
214
        ega_style = INVERTED_COLOR;
215
        break;
216
    case STYLE_EMPHASIS:
217
        ega_style = INVERTED_COLOR | 4;
218
        break;
219
    default:
220
        return INVERTED_COLOR;
221
    }
222
 
223
    return ega_style;
224
}
225
 
226
static unsigned int color_to_ega_style(int fg_color, int bg_color, int attr)
227
{
228
    unsigned int style;
229
 
230
    style = (fg_color & 7) | ((bg_color & 7) << 4);
231
    if (attr & CATTR_BRIGHT)
232
        style = style | 0x08;
233
 
234
    return style;
235
}
236
 
237
static unsigned int rgb_to_ega_style(uint32_t fg, uint32_t bg)
238
{
239
    return (fg > bg) ? NORMAL_COLOR : INVERTED_COLOR;
240
}
241
 
242
static unsigned attr_to_ega_style(const attrs_t *a)
243
{
244
    switch (a->t) {
4537 trochtova 245
    case at_style:
246
        return style_to_ega_style(a->a.s.style);
247
    case at_rgb:
248
        return rgb_to_ega_style(a->a.r.fg_color, a->a.r.bg_color);
249
    case at_idx:
250
        return color_to_ega_style(a->a.i.fg_color,
251
            a->a.i.bg_color, a->a.i.flags);
252
    default:
253
        return INVERTED_COLOR;
4419 trochtova 254
    }
255
}
256
 
257
static uint8_t ega_glyph(wchar_t ch)
258
{
259
    if (ch >= 0 && ch < 128)
260
        return ch;
261
 
262
    return '?';
263
}
264
 
265
static void ega_client_connection(ipc_callid_t iid, ipc_call_t *icall)
266
{
267
    int retval;
268
    ipc_callid_t callid;
269
    ipc_call_t call;
270
    wchar_t c;
271
    unsigned int row, col, w, h;
272
    int bg_color, fg_color, attr;
273
    uint32_t bg_rgb, fg_rgb;
274
    keyfield_t *interbuf = NULL;
275
    size_t intersize = 0;
276
    int i;
277
 
278
    if (client_connected) {
279
        ipc_answer_0(iid, ELIMIT);
280
        return;
281
    }
282
    client_connected = 1;
283
    ipc_answer_0(iid, EOK); /* Accept connection */
284
 
285
    while (1) {
286
        callid = async_get_call(&call);
287
        switch (IPC_GET_METHOD(call)) {
288
        case IPC_M_PHONE_HUNGUP:
289
            client_connected = 0;
290
            ipc_answer_0(callid, EOK);
291
            return; /* Exit thread */
292
        case IPC_M_SHARE_OUT:
293
            /* We accept one area for data interchange */
294
            intersize = IPC_GET_ARG2(call);
295
            if (intersize >= scr_width * scr_height *
296
                sizeof(*interbuf)) {
297
                receive_comm_area(callid, &call,
298
                    (void *) &interbuf);
299
                continue;
300
            }
301
            retval = EINVAL;
302
            break;
303
        case FB_DRAW_TEXT_DATA:
304
            col = IPC_GET_ARG1(call);
305
            row = IPC_GET_ARG2(call);
306
            w = IPC_GET_ARG3(call);
307
            h = IPC_GET_ARG4(call);
308
            if (!interbuf) {
309
                retval = EINVAL;
310
                break;
311
            }
312
            if (col + w > scr_width || row + h > scr_height) {
313
                retval = EINVAL;
314
                break;
315
            }
316
            draw_text_data(interbuf, col, row, w, h);
317
            retval = 0;
318
            break;
319
        case FB_GET_CSIZE:
4537 trochtova 320
            ipc_answer_2(callid, EOK, scr_width, scr_height);
4419 trochtova 321
            continue;
4668 trochtova 322
        case FB_GET_COLOR_CAP:
323
            ipc_answer_1(callid, EOK, FB_CCAP_INDEXED);
324
            continue;
4419 trochtova 325
        case FB_CLEAR:
326
            clrscr();
327
            retval = 0;
328
            break;
329
        case FB_PUTCHAR:
330
            c = IPC_GET_ARG1(call);
4537 trochtova 331
            col = IPC_GET_ARG2(call);
332
            row = IPC_GET_ARG3(call);
4419 trochtova 333
            if (col >= scr_width || row >= scr_height) {
334
                retval = EINVAL;
335
                break;
336
            }
4537 trochtova 337
            printchar(c, col, row);
4419 trochtova 338
            retval = 0;
339
            break;
340
        case FB_CURSOR_GOTO:
4537 trochtova 341
            col = IPC_GET_ARG1(call);
342
            row = IPC_GET_ARG2(call);
4419 trochtova 343
            if (row >= scr_height || col >= scr_width) {
344
                retval = EINVAL;
345
                break;
346
            }
4537 trochtova 347
            cursor_goto(col, row);
4419 trochtova 348
            retval = 0;
349
            break;
350
        case FB_SCROLL:
351
            i = IPC_GET_ARG1(call);
4668 trochtova 352
            if (i > (int) scr_height || i < -((int) scr_height)) {
4419 trochtova 353
                retval = EINVAL;
354
                break;
355
            }
356
            scroll(i);
357
            retval = 0;
358
            break;
359
        case FB_CURSOR_VISIBILITY:
360
            if (IPC_GET_ARG1(call))
361
                cursor_enable();
362
            else
363
                cursor_disable();
364
            retval = 0;
365
            break;
366
        case FB_SET_STYLE:
367
            style = style_to_ega_style(IPC_GET_ARG1(call));
368
            retval = 0;
369
            break;
370
        case FB_SET_COLOR:
371
            fg_color = IPC_GET_ARG1(call);
372
            bg_color = IPC_GET_ARG2(call);
373
            attr = IPC_GET_ARG3(call);
374
            style = color_to_ega_style(fg_color, bg_color, attr);
375
            retval = 0;
376
            break;
377
        case FB_SET_RGB_COLOR:
378
            fg_rgb = IPC_GET_ARG1(call);
379
            bg_rgb = IPC_GET_ARG2(call);
380
            style = rgb_to_ega_style(fg_rgb, bg_rgb);
381
            retval = 0;
382
            break;
383
        case FB_VP_DRAW_PIXMAP:
384
            i = IPC_GET_ARG2(call);
385
            retval = print_screen(i);
386
            break;
387
        case FB_VP2PIXMAP:
388
            retval = save_screen();
389
            break;
390
        case FB_DROP_PIXMAP:
391
            i = IPC_GET_ARG1(call);
392
            if (i >= MAX_SAVED_SCREENS) {
393
                retval = EINVAL;
394
                break;
395
            }
396
            if (saved_screens[i].data) {
397
                free(saved_screens[i].data);
398
                saved_screens[i].data = NULL;
399
            }
400
            retval = 0;
401
            break;
4420 trochtova 402
        case FB_SCREEN_YIELD:
403
        case FB_SCREEN_RECLAIM:
404
            retval = EOK;
405
            break;
4419 trochtova 406
        default:
407
            retval = EINVAL;
408
        }
409
        ipc_answer_0(callid, retval);
410
    }
411
}
412
 
413
int ega_init(void)
414
{
415
    void *ega_ph_addr;
416
    size_t sz;
417
 
418
    ega_ph_addr = (void *) sysinfo_value("fb.address.physical");
419
    scr_width = sysinfo_value("fb.width");
420
    scr_height = sysinfo_value("fb.height");
421
 
422
    if (sysinfo_value("fb.blinking")) {
423
        ega_normal_color &= 0x77;
424
        ega_inverted_color &= 0x77;
425
    }
426
 
427
    style = NORMAL_COLOR;
428
 
429
    iospace_enable(task_get_id(), (void *) EGA_IO_BASE, 2);
430
 
431
    sz = scr_width * scr_height * 2;
432
    scr_addr = as_get_mappable_page(sz);
433
 
434
    if (physmem_map(ega_ph_addr, scr_addr, ALIGN_UP(sz, PAGE_SIZE) >>
435
        PAGE_WIDTH, AS_AREA_READ | AS_AREA_WRITE) != 0)
436
        return -1;
437
 
438
    async_set_client_connection(ega_client_connection);
439
 
440
    return 0;
441
}
442
 
443
 
444
/**
445
 * @}
446
 */