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
53 static int vga_is_gfx;
54
55 /* this is the sti_struct used for this console */
56 static struct sti_struct *sticon_sti;
57
58 /* Software scrollback */
59 static unsigned long softback_buf, softback_curr;
60 static unsigned long softback_in;
61 static unsigned long /* softback_top, */ softback_end;
62 static int softback_lines;
63
64 /* software cursor */
65 static int cursor_drawn;
66 #define CURSOR_DRAW_DELAY (1)
67 #define DEFAULT_CURSOR_BLINK_RATE (20)
68
69 static int vbl_cursor_cnt;
70
cursor_undrawn(void)71 static inline void cursor_undrawn(void)
72 {
73 vbl_cursor_cnt = 0;
74 cursor_drawn = 0;
75 }
76
sticon_startup(void)77 static const char *sticon_startup(void)
78 {
79 return "STI console";
80 }
81
sticon_putc(struct vc_data * conp,int c,int ypos,int xpos)82 static void sticon_putc(struct vc_data *conp, int c, int ypos, int xpos)
83 {
84 int redraw_cursor = 0;
85
86 if (vga_is_gfx || console_blanked)
87 return;
88
89 if (conp->vc_mode != KD_TEXT)
90 return;
91 #if 0
92 if ((p->cursor_x == xpos) && (p->cursor_y == ypos)) {
93 cursor_undrawn();
94 redraw_cursor = 1;
95 }
96 #endif
97
98 sti_putc(sticon_sti, c, ypos, xpos);
99
100 if (redraw_cursor)
101 vbl_cursor_cnt = CURSOR_DRAW_DELAY;
102 }
103
sticon_putcs(struct vc_data * conp,const unsigned short * s,int count,int ypos,int xpos)104 static void sticon_putcs(struct vc_data *conp, const unsigned short *s,
105 int count, int ypos, int xpos)
106 {
107 int redraw_cursor = 0;
108
109 if (vga_is_gfx || console_blanked)
110 return;
111
112 if (conp->vc_mode != KD_TEXT)
113 return;
114
115 #if 0
116 if ((p->cursor_y == ypos) && (xpos <= p->cursor_x) &&
117 (p->cursor_x < (xpos + count))) {
118 cursor_undrawn();
119 redraw_cursor = 1;
120 }
121 #endif
122
123 while (count--) {
124 sti_putc(sticon_sti, scr_readw(s++), ypos, xpos++);
125 }
126
127 if (redraw_cursor)
128 vbl_cursor_cnt = CURSOR_DRAW_DELAY;
129 }
130
sticon_cursor(struct vc_data * conp,int mode)131 static void sticon_cursor(struct vc_data *conp, int mode)
132 {
133 unsigned short car1;
134
135 car1 = conp->vc_screenbuf[conp->vc_x + conp->vc_y * conp->vc_cols];
136 switch (mode) {
137 case CM_ERASE:
138 sti_putc(sticon_sti, car1, conp->vc_y, conp->vc_x);
139 break;
140 case CM_MOVE:
141 case CM_DRAW:
142 switch (conp->vc_cursor_type & 0x0f) {
143 case CUR_UNDERLINE:
144 case CUR_LOWER_THIRD:
145 case CUR_LOWER_HALF:
146 case CUR_TWO_THIRDS:
147 case CUR_BLOCK:
148 sti_putc(sticon_sti, (car1 & 255) + (0 << 8) + (7 << 11),
149 conp->vc_y, conp->vc_x);
150 break;
151 }
152 break;
153 }
154 }
155
sticon_scroll(struct vc_data * conp,int t,int b,int dir,int count)156 static int sticon_scroll(struct vc_data *conp, int t, int b, int dir, int count)
157 {
158 struct sti_struct *sti = sticon_sti;
159
160 if (vga_is_gfx)
161 return 0;
162
163 sticon_cursor(conp, CM_ERASE);
164
165 switch (dir) {
166 case SM_UP:
167 sti_bmove(sti, t + count, 0, t, 0, b - t - count, conp->vc_cols);
168 sti_clear(sti, b - count, 0, count, conp->vc_cols, conp->vc_video_erase_char);
169 break;
170
171 case SM_DOWN:
172 sti_bmove(sti, t, 0, t + count, 0, b - t - count, conp->vc_cols);
173 sti_clear(sti, t, 0, count, conp->vc_cols, conp->vc_video_erase_char);
174 break;
175 }
176
177 return 0;
178 }
179
sticon_init(struct vc_data * c,int init)180 static void sticon_init(struct vc_data *c, int init)
181 {
182 struct sti_struct *sti = sticon_sti;
183 int vc_cols, vc_rows;
184
185 sti_set(sti, 0, 0, sti_onscreen_y(sti), sti_onscreen_x(sti), 0);
186 vc_cols = sti_onscreen_x(sti) / sti->font_width;
187 vc_rows = sti_onscreen_y(sti) / sti->font_height;
188 c->vc_can_do_color = 1;
189
190 if (init) {
191 c->vc_cols = vc_cols;
192 c->vc_rows = vc_rows;
193 } else {
194 /* vc_rows = (c->vc_rows > vc_rows) ? vc_rows : c->vc_rows; */
195 /* vc_cols = (c->vc_cols > vc_cols) ? vc_cols : c->vc_cols; */
196 vc_resize(c, vc_cols, vc_rows);
197 /* vc_resize_con(vc_rows, vc_cols, c->vc_num); */
198 }
199 }
200
sticon_deinit(struct vc_data * c)201 static void sticon_deinit(struct vc_data *c)
202 {
203 }
204
sticon_clear(struct vc_data * conp,int sy,int sx,int height,int width)205 static void sticon_clear(struct vc_data *conp, int sy, int sx, int height,
206 int width)
207 {
208 if (!height || !width)
209 return;
210
211 sti_clear(sticon_sti, sy, sx, height, width, conp->vc_video_erase_char);
212 }
213
sticon_switch(struct vc_data * conp)214 static int sticon_switch(struct vc_data *conp)
215 {
216 return 1; /* needs refreshing */
217 }
218
sticon_set_origin(struct vc_data * conp)219 static int sticon_set_origin(struct vc_data *conp)
220 {
221 return 0;
222 }
223
sticon_blank(struct vc_data * c,int blank,int mode_switch)224 static int sticon_blank(struct vc_data *c, int blank, int mode_switch)
225 {
226 if (blank == 0) {
227 if (mode_switch)
228 vga_is_gfx = 0;
229 return 1;
230 }
231 sticon_set_origin(c);
232 sti_clear(sticon_sti, 0,0, c->vc_rows, c->vc_cols, BLANK);
233 if (mode_switch)
234 vga_is_gfx = 1;
235 return 1;
236 }
237
sticon_screen_pos(struct vc_data * conp,int offset)238 static u16 *sticon_screen_pos(struct vc_data *conp, int offset)
239 {
240 int line;
241 unsigned long p;
242
243 if (conp->vc_num != fg_console || !softback_lines)
244 return (u16 *)(conp->vc_origin + offset);
245 line = offset / conp->vc_size_row;
246 if (line >= softback_lines)
247 return (u16 *)(conp->vc_origin + offset - softback_lines * conp->vc_size_row);
248 p = softback_curr + offset;
249 if (p >= softback_end)
250 p += softback_buf - softback_end;
251 return (u16 *)p;
252 }
253
sticon_getxy(struct vc_data * conp,unsigned long pos,int * px,int * py)254 static unsigned long sticon_getxy(struct vc_data *conp, unsigned long pos,
255 int *px, int *py)
256 {
257 int x, y;
258 unsigned long ret;
259 if (pos >= conp->vc_origin && pos < conp->vc_scr_end) {
260 unsigned long offset = (pos - conp->vc_origin) / 2;
261
262 x = offset % conp->vc_cols;
263 y = offset / conp->vc_cols;
264 if (conp->vc_num == fg_console)
265 y += softback_lines;
266 ret = pos + (conp->vc_cols - x) * 2;
267 } else if (conp->vc_num == fg_console && softback_lines) {
268 unsigned long offset = pos - softback_curr;
269
270 if (pos < softback_curr)
271 offset += softback_end - softback_buf;
272 offset /= 2;
273 x = offset % conp->vc_cols;
274 y = offset / conp->vc_cols;
275 ret = pos + (conp->vc_cols - x) * 2;
276 if (ret == softback_end)
277 ret = softback_buf;
278 if (ret == softback_in)
279 ret = conp->vc_origin;
280 } else {
281 /* Should not happen */
282 x = y = 0;
283 ret = conp->vc_origin;
284 }
285 if (px) *px = x;
286 if (py) *py = y;
287 return ret;
288 }
289
sticon_build_attr(struct vc_data * conp,u8 color,u8 intens,u8 blink,u8 underline,u8 reverse,u8 italic)290 static u8 sticon_build_attr(struct vc_data *conp, u8 color, u8 intens,
291 u8 blink, u8 underline, u8 reverse, u8 italic)
292 {
293 u8 attr = ((color & 0x70) >> 1) | ((color & 7));
294
295 if (reverse) {
296 color = ((color >> 3) & 0x7) | ((color & 0x7) << 3);
297 }
298
299 return attr;
300 }
301
sticon_invert_region(struct vc_data * conp,u16 * p,int count)302 static void sticon_invert_region(struct vc_data *conp, u16 *p, int count)
303 {
304 int col = 1; /* vga_can_do_color; */
305
306 while (count--) {
307 u16 a = scr_readw(p);
308
309 if (col)
310 a = ((a) & 0x88ff) | (((a) & 0x7000) >> 4) | (((a) & 0x0700) << 4);
311 else
312 a = ((a & 0x0700) == 0x0100) ? 0x7000 : 0x7700;
313
314 scr_writew(a, p++);
315 }
316 }
317
sticon_save_screen(struct vc_data * conp)318 static void sticon_save_screen(struct vc_data *conp)
319 {
320 }
321
322 static const struct consw sti_con = {
323 .owner = THIS_MODULE,
324 .con_startup = sticon_startup,
325 .con_init = sticon_init,
326 .con_deinit = sticon_deinit,
327 .con_clear = sticon_clear,
328 .con_putc = sticon_putc,
329 .con_putcs = sticon_putcs,
330 .con_cursor = sticon_cursor,
331 .con_scroll = sticon_scroll,
332 .con_switch = sticon_switch,
333 .con_blank = sticon_blank,
334 .con_set_origin = sticon_set_origin,
335 .con_save_screen = sticon_save_screen,
336 .con_build_attr = sticon_build_attr,
337 .con_invert_region = sticon_invert_region,
338 .con_screen_pos = sticon_screen_pos,
339 .con_getxy = sticon_getxy,
340 };
341
342
343
sticonsole_init(void)344 static int __init sticonsole_init(void)
345 {
346 int err;
347 /* already initialized ? */
348 if (sticon_sti)
349 return 0;
350
351 sticon_sti = sti_get_rom(0);
352 if (!sticon_sti)
353 return -ENODEV;
354
355 if (conswitchp == &dummy_con) {
356 printk(KERN_INFO "sticon: Initializing STI text console.\n");
357 console_lock();
358 err = do_take_over_console(&sti_con, 0, MAX_NR_CONSOLES - 1, 1);
359 console_unlock();
360 return err;
361 }
362 return 0;
363 }
364
365 module_init(sticonsole_init);
366 MODULE_LICENSE("GPL");
367