summaryrefslogtreecommitdiffstats
path: root/drivers/video/console/sticon.c
blob: 57b21e533036983637c4fd6be89b3ba581ee042c (plain)
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
75
76
77
78
79
80
81
82
83
84
85
86
87
88
89
90
91
92
93
94
95
96
97
98
99
100
101
102
103
104
105
106
107
108
109
110
111
112
113
114
115
116
117
118
119
120
121
122
123
124
125
126
127
128
129
130
131
132
133
134
135
136
137
138
139
140
141
142
143
144
145
146
147
148
149
150
151
152
153
154
155
156
157
158
159
160
161
162
163
164
165
166
167
168
169
170
171
172
173
174
175
176
177
178
179
180
181
182
183
184
185
186
187
188
189
190
191
192
193
194
195
196
197
198
199
200
201
202
203
204
205
206
207
208
209
210
211
212
213
214
215
216
217
218
219
220
221
222
223
224
225
226
227
228
229
230
231
232
233
234
235
236
237
238
239
240
241
242
243
244
245
246
247
248
249
250
251
252
253
254
255
256
257
258
259
260
261
262
263
264
265
266
267
268
269
270
271
272
273
274
275
276
277
278
279
280
281
282
283
284
285
286
287
288
289
290
291
292
293
294
295
296
297
298
299
300
301
302
303
304
305
306
307
308
309
310
311
312
313
314
315
316
317
318
319
320
321
322
323
324
325
326
327
328
329
330
331
332
333
334
335
336
337
338
339
340
341
342
343
344
345
346
347
348
349
350
351
352
353
354
355
356
357
358
359
360
361
362
363
364
365
366
367
368
369
370
371
372
373
374
375
376
377
378
379
380
381
382
383
384
385
386
387
388
389
390
391
/*
 *  linux/drivers/video/console/sticon.c - console driver using HP's STI firmware
 *
 *	Copyright (C) 2000 Philipp Rumpf <prumpf@tux.org>
 *	Copyright (C) 2002 Helge Deller <deller@gmx.de>
 *
 *  Based on linux/drivers/video/vgacon.c and linux/drivers/video/fbcon.c,
 *  which were
 *
 *	Created 28 Sep 1997 by Geert Uytterhoeven
 *	Rewritten by Martin Mares <mj@ucw.cz>, July 1998
 *	Copyright (C) 1991, 1992  Linus Torvalds
 *			    1995  Jay Estabrook
 *	Copyright (C) 1995 Geert Uytterhoeven
 *	Copyright (C) 1993 Bjoern Brauel
 *			   Roman Hodek
 *	Copyright (C) 1993 Hamish Macdonald
 *			   Greg Harp
 *	Copyright (C) 1994 David Carter [carter@compsci.bristol.ac.uk]
 *
 *	      with work by William Rucklidge (wjr@cs.cornell.edu)
 *			   Geert Uytterhoeven
 *			   Jes Sorensen (jds@kom.auc.dk)
 *			   Martin Apel
 *	      with work by Guenther Kelleter
 *			   Martin Schaller
 *			   Andreas Schwab
 *			   Emmanuel Marty (core@ggi-project.org)
 *			   Jakub Jelinek (jj@ultra.linux.cz)
 *			   Martin Mares <mj@ucw.cz>
 *
 *  This file is subject to the terms and conditions of the GNU General Public
 *  License.  See the file COPYING in the main directory of this archive for
 *  more details.
 *
 */

#include <linux/init.h>
#include <linux/kernel.h>
#include <linux/console.h>
#include <linux/errno.h>
#include <linux/vt_kern.h>
#include <linux/kd.h>
#include <linux/selection.h>
#include <linux/module.h>

#include <asm/io.h>

#include "../sticore.h"

/* switching to graphics mode */
#define BLANK 0
static int vga_is_gfx;

/* this is the sti_struct used for this console */
static struct sti_struct *sticon_sti;

/* Software scrollback */
static unsigned long softback_buf, softback_curr;
static unsigned long softback_in;
static unsigned long /* softback_top, */ softback_end;
static int softback_lines;

/* software cursor */
static int cursor_drawn;
#define CURSOR_DRAW_DELAY		(1)
#define DEFAULT_CURSOR_BLINK_RATE	(20)

static int vbl_cursor_cnt;

static inline void cursor_undrawn(void)
{
    vbl_cursor_cnt = 0;
    cursor_drawn = 0;
}

static const char *sticon_startup(void)
{
    return "STI console";
}

static int sticon_set_palette(struct vc_data *c, unsigned char *table)
{
    return -EINVAL;
}

static void sticon_putc(struct vc_data *conp, int c, int ypos, int xpos)
{
    int redraw_cursor = 0;

    if (vga_is_gfx || console_blanked)
	    return;

    if (conp->vc_mode != KD_TEXT)
    	    return;
#if 0
    if ((p->cursor_x == xpos) && (p->cursor_y == ypos)) {
	    cursor_undrawn();
	    redraw_cursor = 1;
    }
#endif

    sti_putc(sticon_sti, c, ypos, xpos);

    if (redraw_cursor)
	    vbl_cursor_cnt = CURSOR_DRAW_DELAY;
}

static void sticon_putcs(struct vc_data *conp, const unsigned short *s,
			 int count, int ypos, int xpos)
{
    int redraw_cursor = 0;

    if (vga_is_gfx || console_blanked)
	    return;

    if (conp->vc_mode != KD_TEXT)
    	    return;

#if 0
    if ((p->cursor_y == ypos) && (xpos <= p->cursor_x) &&
	(p->cursor_x < (xpos + count))) {
	    cursor_undrawn();
	    redraw_cursor = 1;
    }
#endif

    while (count--) {
	sti_putc(sticon_sti, scr_readw(s++), ypos, xpos++);
    }

    if (redraw_cursor)
	    vbl_cursor_cnt = CURSOR_DRAW_DELAY;
}

static void sticon_cursor(struct vc_data *conp, int mode)
{
    unsigned short car1;

    car1 = conp->vc_screenbuf[conp->vc_x + conp->vc_y * conp->vc_cols];
    switch (mode) {
    case CM_ERASE:
	sti_putc(sticon_sti, car1, conp->vc_y, conp->vc_x);
	break;
    case CM_MOVE:
    case CM_DRAW:
	switch (conp->vc_cursor_type & 0x0f) {
	case CUR_UNDERLINE:
	case CUR_LOWER_THIRD:
	case CUR_LOWER_HALF:
	case CUR_TWO_THIRDS:
	case CUR_BLOCK:
	    sti_putc(sticon_sti, (car1 & 255) + (0 << 8) + (7 << 11),
		     conp->vc_y, conp->vc_x);
	    break;
	}
	break;
    }
}

static int sticon_scroll(struct vc_data *conp, int t, int b, int dir, int count)
{
    struct sti_struct *sti = sticon_sti;

    if (vga_is_gfx)
        return 0;

    sticon_cursor(conp, CM_ERASE);

    switch (dir) {
    case SM_UP:
	sti_bmove(sti, t + count, 0, t, 0, b - t - count, conp->vc_cols);
	sti_clear(sti, b - count, 0, count, conp->vc_cols, conp->vc_video_erase_char);
	break;

    case SM_DOWN:
	sti_bmove(sti, t, 0, t + count, 0, b - t - count, conp->vc_cols);
	sti_clear(sti, t, 0, count, conp->vc_cols, conp->vc_video_erase_char);
	break;
    }

    return 0;
}

static void sticon_bmove(struct vc_data *conp, int sy, int sx, 
	int dy, int dx, int height, int width)
{
    if (!width || !height)
	    return;
#if 0
    if (((sy <= p->cursor_y) && (p->cursor_y < sy+height) &&
	(sx <= p->cursor_x) && (p->cursor_x < sx+width)) ||
	((dy <= p->cursor_y) && (p->cursor_y < dy+height) &&
	(dx <= p->cursor_x) && (p->cursor_x < dx+width)))
		sticon_cursor(p, CM_ERASE /*|CM_SOFTBACK*/);
#endif

    sti_bmove(sticon_sti, sy, sx, dy, dx, height, width);
}

static void sticon_init(struct vc_data *c, int init)
{
    struct sti_struct *sti = sticon_sti;
    int vc_cols, vc_rows;

    sti_set(sti, 0, 0, sti_onscreen_y(sti), sti_onscreen_x(sti), 0);
    vc_cols = sti_onscreen_x(sti) / sti->font_width;
    vc_rows = sti_onscreen_y(sti) / sti->font_height;
    c->vc_can_do_color = 1;
    
    if (init) {
	c->vc_cols = vc_cols;
	c->vc_rows = vc_rows;
    } else {
	/* vc_rows = (c->vc_rows > vc_rows) ? vc_rows : c->vc_rows; */
	/* vc_cols = (c->vc_cols > vc_cols) ? vc_cols : c->vc_cols; */
	vc_resize(c, vc_cols, vc_rows);
/*	vc_resize_con(vc_rows, vc_cols, c->vc_num); */
    }
}

static void sticon_deinit(struct vc_data *c)
{
}

static void sticon_clear(struct vc_data *conp, int sy, int sx, int height,
			 int width)
{
    if (!height || !width)
	return;

    sti_clear(sticon_sti, sy, sx, height, width, conp->vc_video_erase_char);
}

static int sticon_switch(struct vc_data *conp)
{
    return 1;	/* needs refreshing */
}

static int sticon_set_origin(struct vc_data *conp)
{
    return 0;
}

static int sticon_blank(struct vc_data *c, int blank, int mode_switch)
{
    if (blank == 0) {
	if (mode_switch)
	    vga_is_gfx = 0;
	return 1;
    }
    sticon_set_origin(c);
    sti_clear(sticon_sti, 0,0, c->vc_rows, c->vc_cols, BLANK);
    if (mode_switch)
	vga_is_gfx = 1;
    return 1;
}

static int sticon_scrolldelta(struct vc_data *conp, int lines)
{
    return 0;
}

static u16 *sticon_screen_pos(struct vc_data *conp, int offset)
{
    int line;
    unsigned long p;

    if (conp->vc_num != fg_console || !softback_lines)
    	return (u16 *)(conp->vc_origin + offset);
    line = offset / conp->vc_size_row;
    if (line >= softback_lines)
    	return (u16 *)(conp->vc_origin + offset - softback_lines * conp->vc_size_row);
    p = softback_curr + offset;
    if (p >= softback_end)
    	p += softback_buf - softback_end;
    return (u16 *)p;
}

static unsigned long sticon_getxy(struct vc_data *conp, unsigned long pos,
				  int *px, int *py)
{
    int x, y;
    unsigned long ret;
    if (pos >= conp->vc_origin && pos < conp->vc_scr_end) {
    	unsigned long offset = (pos - conp->vc_origin) / 2;
    	
    	x = offset % conp->vc_cols;
    	y = offset / conp->vc_cols;
    	if (conp->vc_num == fg_console)
    	    y += softback_lines;
    	ret = pos + (conp->vc_cols - x) * 2;
    } else if (conp->vc_num == fg_console && softback_lines) {
    	unsigned long offset = pos - softback_curr;
    	
    	if (pos < softback_curr)
    	    offset += softback_end - softback_buf;
    	offset /= 2;
    	x = offset % conp->vc_cols;
    	y = offset / conp->vc_cols;
	ret = pos + (conp->vc_cols - x) * 2;
	if (ret == softback_end)
	    ret = softback_buf;
	if (ret == softback_in)
	    ret = conp->vc_origin;
    } else {
    	/* Should not happen */
    	x = y = 0;
    	ret = conp->vc_origin;
    }
    if (px) *px = x;
    if (py) *py = y;
    return ret;
}

static u8 sticon_build_attr(struct vc_data *conp, u8 color, u8 intens,
			    u8 blink, u8 underline, u8 reverse)
{
    u8 attr = ((color & 0x70) >> 1) | ((color & 7));

    if (reverse) {
	color = ((color >> 3) & 0x7) | ((color & 0x7) << 3);
    }

    return attr;
}

static void sticon_invert_region(struct vc_data *conp, u16 *p, int count)
{
    int col = 1; /* vga_can_do_color; */

    while (count--) {
	u16 a = scr_readw(p);

	if (col)
		a = ((a) & 0x88ff) | (((a) & 0x7000) >> 4) | (((a) & 0x0700) << 4);
	else
		a = ((a & 0x0700) == 0x0100) ? 0x7000 : 0x7700;

	scr_writew(a, p++);
    }
}

static void sticon_save_screen(struct vc_data *conp)
{
}

static const struct consw sti_con = {
	.owner			= THIS_MODULE,
	.con_startup		= sticon_startup,
	.con_init		= sticon_init,
	.con_deinit		= sticon_deinit,
	.con_clear		= sticon_clear,
	.con_putc		= sticon_putc,
	.con_putcs		= sticon_putcs,
	.con_cursor		= sticon_cursor,
	.con_scroll		= sticon_scroll,
	.con_bmove		= sticon_bmove,
	.con_switch		= sticon_switch,
	.con_blank		= sticon_blank,
	.con_set_palette	= sticon_set_palette,
	.con_scrolldelta	= sticon_scrolldelta,
	.con_set_origin		= sticon_set_origin,
	.con_save_screen	= sticon_save_screen, 
	.con_build_attr		= sticon_build_attr,
	.con_invert_region	= sticon_invert_region, 
	.con_screen_pos		= sticon_screen_pos,
	.con_getxy		= sticon_getxy,
};



int __init sticonsole_init(void)
{
    /* already initialized ? */
    if (sticon_sti)
	 return 0;

    sticon_sti = sti_get_rom(0);
    if (!sticon_sti)
	return -ENODEV;

    if (conswitchp == &dummy_con) {
	printk(KERN_INFO "sticon: Initializing STI text console.\n");
	return take_over_console(&sti_con, 0, MAX_NR_CONSOLES - 1, 1);
    }
    return 0;
}

module_init(sticonsole_init);
MODULE_LICENSE("GPL");