summaryrefslogtreecommitdiffstats
path: root/drivers/video/console/sticon.c
blob: 2cea69418a83c36920d55e4980509a7d239bd4c6 (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
392
393
394
395
396
397
398
399
400
401
402
403
404
405
406
407
408
409
/*
 *  linux/drivers/video/console/sticon.c - console driver using HP's STI firmware
 *
 *	Copyright (C) 2000 Philipp Rumpf <prumpf@tux.org>
 *	Copyright (C) 2002-2020 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 <linux/slab.h>
#include <linux/font.h>
#include <linux/crc32.h>
#include <linux/fb.h>

#include <asm/io.h>

#include "../fbdev/sticore.h"

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

#define STI_DEF_FONT	sticon_sti->font

/* borrowed from fbcon.c */
#define FNTREFCOUNT(fd)	(fd->refcount)
#define FNTCRC(fd)	(fd->crc)
static struct sti_cooked_font *font_data[MAX_NR_CONSOLES];

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

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

static void sticon_putc(struct vc_data *conp, int c, int ypos, int xpos)
{
    if (vga_is_gfx || console_blanked)
	    return;

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

    sti_putc(sticon_sti, c, ypos, xpos, font_data[conp->vc_num]);
}

static void sticon_putcs(struct vc_data *conp, const unsigned short *s,
			 int count, int ypos, int xpos)
{
    if (vga_is_gfx || console_blanked)
	    return;

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

    while (count--) {
	sti_putc(sticon_sti, scr_readw(s++), ypos, xpos++,
		 font_data[conp->vc_num]);
    }
}

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

    /* no cursor update if screen is blanked */
    if (vga_is_gfx || console_blanked)
	return;

    car1 = conp->vc_screenbuf[conp->state.x + conp->state.y * conp->vc_cols];
    switch (mode) {
    case CM_ERASE:
	sti_putc(sticon_sti, car1, conp->state.y, conp->state.x,
		 font_data[conp->vc_num]);
	break;
    case CM_MOVE:
    case CM_DRAW:
	switch (CUR_SIZE(conp->vc_cursor_type)) {
	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->state.y, conp->state.x, font_data[conp->vc_num]);
	    break;
	}
	break;
    }
}

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

    if (vga_is_gfx)
        return false;

    sticon_cursor(conp, CM_ERASE);

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

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

    return false;
}

static int sticon_set_def_font(int unit, struct console_font *op)
{
	if (font_data[unit] != STI_DEF_FONT) {
		if (--FNTREFCOUNT(font_data[unit]) == 0) {
			kfree(font_data[unit]->raw_ptr);
			kfree(font_data[unit]);
		}
		font_data[unit] = STI_DEF_FONT;
	}

	return 0;
}

static int sticon_set_font(struct vc_data *vc, struct console_font *op,
			   unsigned int vpitch)
{
	struct sti_struct *sti = sticon_sti;
	int vc_cols, vc_rows, vc_old_cols, vc_old_rows;
	int unit = vc->vc_num;
	int w = op->width;
	int h = op->height;
	int size, i, bpc, pitch;
	struct sti_rom_font *new_font;
	struct sti_cooked_font *cooked_font;
	unsigned char *data = op->data, *p;

	if ((w < 6) || (h < 6) || (w > 32) || (h > 32) || (vpitch != 32)
	    || (op->charcount != 256 && op->charcount != 512))
		return -EINVAL;
	pitch = ALIGN(w, 8) / 8;
	bpc = pitch * h;
	size = bpc * op->charcount;

	new_font = kmalloc(sizeof(*new_font) + size, STI_LOWMEM);
	if (!new_font)
		return -ENOMEM;

	new_font->first_char = 0;
	new_font->last_char = op->charcount - 1;
	new_font->width = w;
	new_font->height = h;
	new_font->font_type = STI_FONT_HPROMAN8;
	new_font->bytes_per_char = bpc;
	new_font->underline_height = 0;
	new_font->underline_pos = 0;

	cooked_font = kzalloc(sizeof(*cooked_font), GFP_KERNEL);
	if (!cooked_font) {
		kfree(new_font);
		return -ENOMEM;
	}
	cooked_font->raw = new_font;
	cooked_font->raw_ptr = new_font;
	cooked_font->width = w;
	cooked_font->height = h;
	FNTREFCOUNT(cooked_font) = 0;	/* usage counter */

	p = (unsigned char *) new_font;
	p += sizeof(*new_font);
	for (i = 0; i < op->charcount; i++) {
		memcpy(p, data, bpc);
		data += pitch*32;
		p += bpc;
	}
	FNTCRC(cooked_font) = crc32(0, new_font, size + sizeof(*new_font));
	sti_font_convert_bytemode(sti, cooked_font);
	new_font = cooked_font->raw_ptr;

	/* check if font is already used by other console */
	for (i = 0; i < MAX_NR_CONSOLES; i++) {
		if (font_data[i] != STI_DEF_FONT
		    && (FNTCRC(font_data[i]) == FNTCRC(cooked_font))) {
			kfree(new_font);
			kfree(cooked_font);
			/* current font is the same as the new one */
			if (i == unit)
				return 0;
			cooked_font = font_data[i];
			new_font = cooked_font->raw_ptr;
			break;
		}
	}

	/* clear screen with old font: we now may have less rows */
	vc_old_rows = vc->vc_rows;
	vc_old_cols = vc->vc_cols;
	sti_clear(sticon_sti, 0, 0, vc_old_rows, vc_old_cols,
		  vc->vc_video_erase_char, font_data[vc->vc_num]);

	/* delete old font in case it is a user font */
	sticon_set_def_font(unit, NULL);

	FNTREFCOUNT(cooked_font)++;
	font_data[unit] = cooked_font;

	vc_cols = sti_onscreen_x(sti) / cooked_font->width;
	vc_rows = sti_onscreen_y(sti) / cooked_font->height;
	vc_resize(vc, vc_cols, vc_rows);

	/* need to repaint screen if cols & rows are same as old font */
	if (vc_cols == vc_old_cols && vc_rows == vc_old_rows)
		update_screen(vc);

	return 0;
}

static int sticon_font_default(struct vc_data *vc, struct console_font *op, char *name)
{
	return sticon_set_def_font(vc->vc_num, op);
}

static int sticon_font_set(struct vc_data *vc, struct console_font *font,
			   unsigned int vpitch, unsigned int flags)
{
	return sticon_set_font(vc, font, vpitch);
}

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_resize(c, vc_cols, vc_rows);
    }
}

static void sticon_deinit(struct vc_data *c)
{
    int i;

    /* free memory used by user font */
    for (i = 0; i < MAX_NR_CONSOLES; i++)
	sticon_set_def_font(i, NULL);
}

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, font_data[conp->vc_num]);
}

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

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;
    }
    sti_clear(sticon_sti, 0, 0, c->vc_rows, c->vc_cols, BLANK,
	      font_data[c->vc_num]);
    if (mode_switch)
	vga_is_gfx = 1;
    return 1;
}

static u8 sticon_build_attr(struct vc_data *conp, u8 color,
			    enum vc_intensity intens,
			    bool blink, bool underline, bool reverse,
			    bool italic)
{
	u8 fg = color & 7;
	u8 bg = (color & 0x70) >> 4;

	if (reverse)
		return (fg << 3) | bg;
	else
		return (bg << 3) | fg;
}

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 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_switch		= sticon_switch,
	.con_blank		= sticon_blank,
	.con_font_set		= sticon_font_set,
	.con_font_default	= sticon_font_default,
	.con_build_attr		= sticon_build_attr,
	.con_invert_region	= sticon_invert_region, 
};



static int __init sticonsole_init(void)
{
    int err, i;

    /* already initialized ? */
    if (sticon_sti)
	 return 0;

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

    for (i = 0; i < MAX_NR_CONSOLES; i++)
	font_data[i] = STI_DEF_FONT;

    pr_info("sticon: Initializing STI text console on %s at [%s]\n",
	sticon_sti->sti_data->inq_outptr.dev_name,
	sticon_sti->pa_path);
    console_lock();
    err = do_take_over_console(&sti_con, 0, MAX_NR_CONSOLES - 1,
		PAGE0->mem_cons.cl_class != CL_DUPLEX);
    console_unlock();

    return err;
}

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