2 * linux/drivers/video/console/sticon.c - console driver using HP's STI firmware
7 * Based on linux/drivers/video/vgacon.c and linux/drivers/video/fbcon.c,
10 * Created 28 Sep 1997 by Geert Uytterhoeven
12 * Copyright (C) 1991, 1992 Linus Torvalds
14 * Copyright (C) 1995 Geert Uytterhoeven
15 * Copyright (C) 1993 Bjoern Brauel
17 * Copyright (C) 1993 Hamish Macdonald
25 * with work by Guenther Kelleter
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
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>
44 #include <linux/selection.h>
45 #include <linux/module.h>
49 #include "../fbdev/sticore.h"
51 /* switching to graphics mode */
53 static int vga_is_gfx;
55 /* this is the sti_struct used for this console */
56 static struct sti_struct *sticon_sti;
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;
65 static int cursor_drawn;
66 #define CURSOR_DRAW_DELAY (1)
67 #define DEFAULT_CURSOR_BLINK_RATE (20)
69 static int vbl_cursor_cnt;
71 static inline void cursor_undrawn(void)
77 static const char *sticon_startup(void)
82 static void sticon_putc(struct vc_data *conp, int c, int ypos, int xpos)
84 int redraw_cursor = 0;
86 if (vga_is_gfx || console_blanked)
89 if (conp->vc_mode != KD_TEXT)
92 if ((p->cursor_x == xpos) && (p->cursor_y == ypos)) {
98 sti_putc(sticon_sti, c, ypos, xpos);
101 vbl_cursor_cnt = CURSOR_DRAW_DELAY;
104 static void sticon_putcs(struct vc_data *conp, const unsigned short *s,
105 int count, int ypos, int xpos)
107 int redraw_cursor = 0;
109 if (vga_is_gfx || console_blanked)
112 if (conp->vc_mode != KD_TEXT)
116 if ((p->cursor_y == ypos) && (xpos <= p->cursor_x) &&
117 (p->cursor_x < (xpos + count))) {
124 sti_putc(sticon_sti, scr_readw(s++), ypos, xpos++);
128 vbl_cursor_cnt = CURSOR_DRAW_DELAY;
131 static void sticon_cursor(struct vc_data *conp, int mode)
135 car1 = conp->vc_screenbuf[conp->vc_x + conp->vc_y * conp->vc_cols];
138 sti_putc(sticon_sti, car1, conp->vc_y, conp->vc_x);
142 switch (conp->vc_cursor_type & 0x0f) {
144 case CUR_LOWER_THIRD:
148 sti_putc(sticon_sti, (car1 & 255) + (0 << 8) + (7 << 11),
149 conp->vc_y, conp->vc_x);
156 static bool sticon_scroll(struct vc_data *conp, unsigned int t,
157 unsigned int b, enum con_scroll dir, unsigned int count)
159 struct sti_struct *sti = sticon_sti;
164 sticon_cursor(conp, CM_ERASE);
168 sti_bmove(sti, t + count, 0, t, 0, b - t - count, conp->vc_cols);
169 sti_clear(sti, b - count, 0, count, conp->vc_cols, conp->vc_video_erase_char);
173 sti_bmove(sti, t, 0, t + count, 0, b - t - count, conp->vc_cols);
174 sti_clear(sti, t, 0, count, conp->vc_cols, conp->vc_video_erase_char);
181 static void sticon_init(struct vc_data *c, int init)
183 struct sti_struct *sti = sticon_sti;
184 int vc_cols, vc_rows;
186 sti_set(sti, 0, 0, sti_onscreen_y(sti), sti_onscreen_x(sti), 0);
187 vc_cols = sti_onscreen_x(sti) / sti->font_width;
188 vc_rows = sti_onscreen_y(sti) / sti->font_height;
189 c->vc_can_do_color = 1;
192 c->vc_cols = vc_cols;
193 c->vc_rows = vc_rows;
195 /* vc_rows = (c->vc_rows > vc_rows) ? vc_rows : c->vc_rows; */
196 /* vc_cols = (c->vc_cols > vc_cols) ? vc_cols : c->vc_cols; */
197 vc_resize(c, vc_cols, vc_rows);
198 /* vc_resize_con(vc_rows, vc_cols, c->vc_num); */
202 static void sticon_deinit(struct vc_data *c)
206 static void sticon_clear(struct vc_data *conp, int sy, int sx, int height,
209 if (!height || !width)
212 sti_clear(sticon_sti, sy, sx, height, width, conp->vc_video_erase_char);
215 static int sticon_switch(struct vc_data *conp)
217 return 1; /* needs refreshing */
220 static int sticon_set_origin(struct vc_data *conp)
225 static int sticon_blank(struct vc_data *c, int blank, int mode_switch)
232 sticon_set_origin(c);
233 sti_clear(sticon_sti, 0,0, c->vc_rows, c->vc_cols, BLANK);
239 static u16 *sticon_screen_pos(struct vc_data *conp, int offset)
244 if (conp->vc_num != fg_console || !softback_lines)
245 return (u16 *)(conp->vc_origin + offset);
246 line = offset / conp->vc_size_row;
247 if (line >= softback_lines)
248 return (u16 *)(conp->vc_origin + offset - softback_lines * conp->vc_size_row);
249 p = softback_curr + offset;
250 if (p >= softback_end)
251 p += softback_buf - softback_end;
255 static unsigned long sticon_getxy(struct vc_data *conp, unsigned long pos,
260 if (pos >= conp->vc_origin && pos < conp->vc_scr_end) {
261 unsigned long offset = (pos - conp->vc_origin) / 2;
263 x = offset % conp->vc_cols;
264 y = offset / conp->vc_cols;
265 if (conp->vc_num == fg_console)
267 ret = pos + (conp->vc_cols - x) * 2;
268 } else if (conp->vc_num == fg_console && softback_lines) {
269 unsigned long offset = pos - softback_curr;
271 if (pos < softback_curr)
272 offset += softback_end - softback_buf;
274 x = offset % conp->vc_cols;
275 y = offset / conp->vc_cols;
276 ret = pos + (conp->vc_cols - x) * 2;
277 if (ret == softback_end)
279 if (ret == softback_in)
280 ret = conp->vc_origin;
282 /* Should not happen */
284 ret = conp->vc_origin;
291 static u8 sticon_build_attr(struct vc_data *conp, u8 color, u8 intens,
292 u8 blink, u8 underline, u8 reverse, u8 italic)
294 u8 attr = ((color & 0x70) >> 1) | ((color & 7));
297 color = ((color >> 3) & 0x7) | ((color & 0x7) << 3);
303 static void sticon_invert_region(struct vc_data *conp, u16 *p, int count)
305 int col = 1; /* vga_can_do_color; */
308 u16 a = scr_readw(p);
311 a = ((a) & 0x88ff) | (((a) & 0x7000) >> 4) | (((a) & 0x0700) << 4);
313 a = ((a & 0x0700) == 0x0100) ? 0x7000 : 0x7700;
319 static void sticon_save_screen(struct vc_data *conp)
323 static const struct consw sti_con = {
324 .owner = THIS_MODULE,
325 .con_startup = sticon_startup,
326 .con_init = sticon_init,
327 .con_deinit = sticon_deinit,
328 .con_clear = sticon_clear,
329 .con_putc = sticon_putc,
330 .con_putcs = sticon_putcs,
331 .con_cursor = sticon_cursor,
332 .con_scroll = sticon_scroll,
333 .con_switch = sticon_switch,
334 .con_blank = sticon_blank,
335 .con_set_origin = sticon_set_origin,
336 .con_save_screen = sticon_save_screen,
337 .con_build_attr = sticon_build_attr,
338 .con_invert_region = sticon_invert_region,
339 .con_screen_pos = sticon_screen_pos,
340 .con_getxy = sticon_getxy,
345 static int __init sticonsole_init(void)
348 /* already initialized ? */
352 sticon_sti = sti_get_rom(0);
356 if (conswitchp == &dummy_con) {
357 printk(KERN_INFO "sticon: Initializing STI text console.\n");
359 err = do_take_over_console(&sti_con, 0, MAX_NR_CONSOLES - 1, 1);
366 module_init(sticonsole_init);
367 MODULE_LICENSE("GPL");