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1/*
2 *  linux/drivers/video/console/sticon.c - console driver using HP's STI firmware
3 *
4 *	Copyright (C) 2000 Philipp Rumpf <prumpf@tux.org>
5 *	Copyright (C) 2002 Helge Deller <deller@gmx.de>
6 *
7 *  Based on linux/drivers/video/vgacon.c and linux/drivers/video/fbcon.c,
8 *  which were
9 *
10 *	Created 28 Sep 1997 by Geert Uytterhoeven
11 *	Rewritten by Martin Mares <mj@ucw.cz>, July 1998
12 *	Copyright (C) 1991, 1992  Linus Torvalds
13 *			    1995  Jay Estabrook
14 *	Copyright (C) 1995 Geert Uytterhoeven
15 *	Copyright (C) 1993 Bjoern Brauel
16 *			   Roman Hodek
17 *	Copyright (C) 1993 Hamish Macdonald
18 *			   Greg Harp
19 *	Copyright (C) 1994 David Carter [carter@compsci.bristol.ac.uk]
20 *
21 *	      with work by William Rucklidge (wjr@cs.cornell.edu)
22 *			   Geert Uytterhoeven
23 *			   Jes Sorensen (jds@kom.auc.dk)
24 *			   Martin Apel
25 *	      with work by Guenther Kelleter
26 *			   Martin Schaller
27 *			   Andreas Schwab
28 *			   Emmanuel Marty (core@ggi-project.org)
29 *			   Jakub Jelinek (jj@ultra.linux.cz)
30 *			   Martin Mares <mj@ucw.cz>
31 *
32 *  This file is subject to the terms and conditions of the GNU General Public
33 *  License.  See the file COPYING in the main directory of this archive for
34 *  more details.
35 *
36 */
37
38#include <linux/init.h>
39#include <linux/kernel.h>
40#include <linux/console.h>
41#include <linux/errno.h>
42#include <linux/vt_kern.h>
43#include <linux/kd.h>
44#include <linux/selection.h>
45#include <linux/module.h>
46
47#include <asm/io.h>
48
49#include "../fbdev/sticore.h"
50
51/* switching to graphics mode */
52#define BLANK 0
53static int vga_is_gfx;
54
55/* this is the sti_struct used for this console */
56static struct sti_struct *sticon_sti;
57
58/* Software scrollback */
59static unsigned long softback_buf, softback_curr;
60static unsigned long softback_in;
61static unsigned long /* softback_top, */ softback_end;
62static int softback_lines;
63
64/* software cursor */
65static int cursor_drawn;
66#define CURSOR_DRAW_DELAY		(1)
67#define DEFAULT_CURSOR_BLINK_RATE	(20)
68
69static int vbl_cursor_cnt;
70
71static inline void cursor_undrawn(void)
72{
73    vbl_cursor_cnt = 0;
74    cursor_drawn = 0;
75}
76
77static const char *sticon_startup(void)
78{
79    return "STI console";
80}
81
82static int sticon_set_palette(struct vc_data *c, unsigned char *table)
83{
84    return -EINVAL;
85}
86
87static void sticon_putc(struct vc_data *conp, int c, int ypos, int xpos)
88{
89    int redraw_cursor = 0;
90
91    if (vga_is_gfx || console_blanked)
92	    return;
93
94    if (conp->vc_mode != KD_TEXT)
95    	    return;
96#if 0
97    if ((p->cursor_x == xpos) && (p->cursor_y == ypos)) {
98	    cursor_undrawn();
99	    redraw_cursor = 1;
100    }
101#endif
102
103    sti_putc(sticon_sti, c, ypos, xpos);
104
105    if (redraw_cursor)
106	    vbl_cursor_cnt = CURSOR_DRAW_DELAY;
107}
108
109static void sticon_putcs(struct vc_data *conp, const unsigned short *s,
110			 int count, int ypos, int xpos)
111{
112    int redraw_cursor = 0;
113
114    if (vga_is_gfx || console_blanked)
115	    return;
116
117    if (conp->vc_mode != KD_TEXT)
118    	    return;
119
120#if 0
121    if ((p->cursor_y == ypos) && (xpos <= p->cursor_x) &&
122	(p->cursor_x < (xpos + count))) {
123	    cursor_undrawn();
124	    redraw_cursor = 1;
125    }
126#endif
127
128    while (count--) {
129	sti_putc(sticon_sti, scr_readw(s++), ypos, xpos++);
130    }
131
132    if (redraw_cursor)
133	    vbl_cursor_cnt = CURSOR_DRAW_DELAY;
134}
135
136static void sticon_cursor(struct vc_data *conp, int mode)
137{
138    unsigned short car1;
139
140    car1 = conp->vc_screenbuf[conp->vc_x + conp->vc_y * conp->vc_cols];
141    switch (mode) {
142    case CM_ERASE:
143	sti_putc(sticon_sti, car1, conp->vc_y, conp->vc_x);
144	break;
145    case CM_MOVE:
146    case CM_DRAW:
147	switch (conp->vc_cursor_type & 0x0f) {
148	case CUR_UNDERLINE:
149	case CUR_LOWER_THIRD:
150	case CUR_LOWER_HALF:
151	case CUR_TWO_THIRDS:
152	case CUR_BLOCK:
153	    sti_putc(sticon_sti, (car1 & 255) + (0 << 8) + (7 << 11),
154		     conp->vc_y, conp->vc_x);
155	    break;
156	}
157	break;
158    }
159}
160
161static int sticon_scroll(struct vc_data *conp, int t, int b, int dir, int count)
162{
163    struct sti_struct *sti = sticon_sti;
164
165    if (vga_is_gfx)
166        return 0;
167
168    sticon_cursor(conp, CM_ERASE);
169
170    switch (dir) {
171    case SM_UP:
172	sti_bmove(sti, t + count, 0, t, 0, b - t - count, conp->vc_cols);
173	sti_clear(sti, b - count, 0, count, conp->vc_cols, conp->vc_video_erase_char);
174	break;
175
176    case SM_DOWN:
177	sti_bmove(sti, t, 0, t + count, 0, b - t - count, conp->vc_cols);
178	sti_clear(sti, t, 0, count, conp->vc_cols, conp->vc_video_erase_char);
179	break;
180    }
181
182    return 0;
183}
184
185static void sticon_bmove(struct vc_data *conp, int sy, int sx,
186	int dy, int dx, int height, int width)
187{
188    if (!width || !height)
189	    return;
190#if 0
191    if (((sy <= p->cursor_y) && (p->cursor_y < sy+height) &&
192	(sx <= p->cursor_x) && (p->cursor_x < sx+width)) ||
193	((dy <= p->cursor_y) && (p->cursor_y < dy+height) &&
194	(dx <= p->cursor_x) && (p->cursor_x < dx+width)))
195		sticon_cursor(p, CM_ERASE /*|CM_SOFTBACK*/);
196#endif
197
198    sti_bmove(sticon_sti, sy, sx, dy, dx, height, width);
199}
200
201static void sticon_init(struct vc_data *c, int init)
202{
203    struct sti_struct *sti = sticon_sti;
204    int vc_cols, vc_rows;
205
206    sti_set(sti, 0, 0, sti_onscreen_y(sti), sti_onscreen_x(sti), 0);
207    vc_cols = sti_onscreen_x(sti) / sti->font_width;
208    vc_rows = sti_onscreen_y(sti) / sti->font_height;
209    c->vc_can_do_color = 1;
210
211    if (init) {
212	c->vc_cols = vc_cols;
213	c->vc_rows = vc_rows;
214    } else {
215	/* vc_rows = (c->vc_rows > vc_rows) ? vc_rows : c->vc_rows; */
216	/* vc_cols = (c->vc_cols > vc_cols) ? vc_cols : c->vc_cols; */
217	vc_resize(c, vc_cols, vc_rows);
218/*	vc_resize_con(vc_rows, vc_cols, c->vc_num); */
219    }
220}
221
222static void sticon_deinit(struct vc_data *c)
223{
224}
225
226static void sticon_clear(struct vc_data *conp, int sy, int sx, int height,
227			 int width)
228{
229    if (!height || !width)
230	return;
231
232    sti_clear(sticon_sti, sy, sx, height, width, conp->vc_video_erase_char);
233}
234
235static int sticon_switch(struct vc_data *conp)
236{
237    return 1;	/* needs refreshing */
238}
239
240static int sticon_set_origin(struct vc_data *conp)
241{
242    return 0;
243}
244
245static int sticon_blank(struct vc_data *c, int blank, int mode_switch)
246{
247    if (blank == 0) {
248	if (mode_switch)
249	    vga_is_gfx = 0;
250	return 1;
251    }
252    sticon_set_origin(c);
253    sti_clear(sticon_sti, 0,0, c->vc_rows, c->vc_cols, BLANK);
254    if (mode_switch)
255	vga_is_gfx = 1;
256    return 1;
257}
258
259static int sticon_scrolldelta(struct vc_data *conp, int lines)
260{
261    return 0;
262}
263
264static u16 *sticon_screen_pos(struct vc_data *conp, int offset)
265{
266    int line;
267    unsigned long p;
268
269    if (conp->vc_num != fg_console || !softback_lines)
270    	return (u16 *)(conp->vc_origin + offset);
271    line = offset / conp->vc_size_row;
272    if (line >= softback_lines)
273    	return (u16 *)(conp->vc_origin + offset - softback_lines * conp->vc_size_row);
274    p = softback_curr + offset;
275    if (p >= softback_end)
276    	p += softback_buf - softback_end;
277    return (u16 *)p;
278}
279
280static unsigned long sticon_getxy(struct vc_data *conp, unsigned long pos,
281				  int *px, int *py)
282{
283    int x, y;
284    unsigned long ret;
285    if (pos >= conp->vc_origin && pos < conp->vc_scr_end) {
286    	unsigned long offset = (pos - conp->vc_origin) / 2;
287
288    	x = offset % conp->vc_cols;
289    	y = offset / conp->vc_cols;
290    	if (conp->vc_num == fg_console)
291    	    y += softback_lines;
292    	ret = pos + (conp->vc_cols - x) * 2;
293    } else if (conp->vc_num == fg_console && softback_lines) {
294    	unsigned long offset = pos - softback_curr;
295
296    	if (pos < softback_curr)
297    	    offset += softback_end - softback_buf;
298    	offset /= 2;
299    	x = offset % conp->vc_cols;
300    	y = offset / conp->vc_cols;
301	ret = pos + (conp->vc_cols - x) * 2;
302	if (ret == softback_end)
303	    ret = softback_buf;
304	if (ret == softback_in)
305	    ret = conp->vc_origin;
306    } else {
307    	/* Should not happen */
308    	x = y = 0;
309    	ret = conp->vc_origin;
310    }
311    if (px) *px = x;
312    if (py) *py = y;
313    return ret;
314}
315
316static u8 sticon_build_attr(struct vc_data *conp, u8 color, u8 intens,
317			    u8 blink, u8 underline, u8 reverse, u8 italic)
318{
319    u8 attr = ((color & 0x70) >> 1) | ((color & 7));
320
321    if (reverse) {
322	color = ((color >> 3) & 0x7) | ((color & 0x7) << 3);
323    }
324
325    return attr;
326}
327
328static void sticon_invert_region(struct vc_data *conp, u16 *p, int count)
329{
330    int col = 1; /* vga_can_do_color; */
331
332    while (count--) {
333	u16 a = scr_readw(p);
334
335	if (col)
336		a = ((a) & 0x88ff) | (((a) & 0x7000) >> 4) | (((a) & 0x0700) << 4);
337	else
338		a = ((a & 0x0700) == 0x0100) ? 0x7000 : 0x7700;
339
340	scr_writew(a, p++);
341    }
342}
343
344static void sticon_save_screen(struct vc_data *conp)
345{
346}
347
348static const struct consw sti_con = {
349	.owner			= THIS_MODULE,
350	.con_startup		= sticon_startup,
351	.con_init		= sticon_init,
352	.con_deinit		= sticon_deinit,
353	.con_clear		= sticon_clear,
354	.con_putc		= sticon_putc,
355	.con_putcs		= sticon_putcs,
356	.con_cursor		= sticon_cursor,
357	.con_scroll		= sticon_scroll,
358	.con_bmove		= sticon_bmove,
359	.con_switch		= sticon_switch,
360	.con_blank		= sticon_blank,
361	.con_set_palette	= sticon_set_palette,
362	.con_scrolldelta	= sticon_scrolldelta,
363	.con_set_origin		= sticon_set_origin,
364	.con_save_screen	= sticon_save_screen,
365	.con_build_attr		= sticon_build_attr,
366	.con_invert_region	= sticon_invert_region,
367	.con_screen_pos		= sticon_screen_pos,
368	.con_getxy		= sticon_getxy,
369};
370
371
372
373static int __init sticonsole_init(void)
374{
375    int err;
376    /* already initialized ? */
377    if (sticon_sti)
378	 return 0;
379
380    sticon_sti = sti_get_rom(0);
381    if (!sticon_sti)
382	return -ENODEV;
383
384    if (conswitchp == &dummy_con) {
385	printk(KERN_INFO "sticon: Initializing STI text console.\n");
386	console_lock();
387	err = do_take_over_console(&sti_con, 0, MAX_NR_CONSOLES - 1, 1);
388	console_unlock();
389	return err;
390    }
391    return 0;
392}
393
394module_init(sticonsole_init);
395MODULE_LICENSE("GPL");
396